publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2023-09-05 | Energy and morphology of martensite-twinned martensite interface in CuAlNi shape memory alloy: a phase-field study | Needle-like twins are observed experimentally within the transition layer at
the martensite-twinned martensite interface. We utilize a phase-field approach
to investigate this microstructure. Our goal is to simulate the morphology of
the transition layer and to perform a detailed analysis to characterize its
interfacia... | 2309.02039v1 |
2023-09-15 | A collinear-spin machine learned interatomic potential for Fe$_{7}$Cr$_{2}$Ni alloy | We have developed a new machine learned interatomic potential for the
prototypical austenitic steel Fe$_{7}$Cr$_{2}$Ni, using the Gaussian
approximation potential (GAP) framework. This new GAP can model the alloy's
properties with close to density functional theory (DFT) accuracy, while at the
same time allowing us to ... | 2309.08689v2 |
2023-09-19 | Impact of micro-indentation load/time and Zinc concentration on the thermo-mechanical characteristics of amorphous Se$_{78}$Te$_{20}$Sn$_2$ alloy | We have performed hardness measurement experiments under different loads and
loading times by performing micro-indentation marks in the present work.
Chalcogenide glasses (ChGs) comprising Se$_{78}$Te$_{20}$Sn$_2$ and
Se$_{78-x}$Te$_{20}$Sn$_2$Zn$_x$ (where $x = 0, 2, 4, 6$) alloys are the
subject of micro-indentation ... | 2309.10915v1 |
2023-10-01 | Diving into the Depths of Spotting Text in Multi-Domain Noisy Scenes | When used in a real-world noisy environment, the capacity to generalize to
multiple domains is essential for any autonomous scene text spotting system.
However, existing state-of-the-art methods employ pretraining and fine-tuning
strategies on natural scene datasets, which do not exploit the feature
interaction across ... | 2310.00558v3 |
2023-10-13 | An unprecedented synergy of high-temperature tensile strength and ductility in a NiCoCrAlTi high-entropy alloy | The present work reported a novel L12-strengthening NiCoCrAlTi high entropy
alloy (HEA) with an outstanding synergy of tensile strength and ductility at
both ambient and high temperatures. Transmission electron microscopy (TEM)
characterization revealed a high density of rod-like and spheroidal L12
precipitates distrib... | 2310.08850v1 |
2023-10-16 | Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering | Functional materials such as magnetic, thermoelectric, and battery materials
have been revolutionized through nanostructure engineering. However, spin
caloritronics, an advancing field based on spintronics and thermoelectrics with
fundamental physics studies, has focused only on uniform materials without
complex micros... | 2310.10233v1 |
2023-10-24 | Is hydrogen diffusion in amorphous metals non-Arrhenian? | Hydrogen diffusion is critical to the performance of metals for hydrogen
storage as well as other important applications. As compared to its crystalline
counterpart which follows the Arrhenius relation, hydrogen diffusion in
amorphous metals sometimes are experimentally found to be non-Arrhenian. In
this work we studie... | 2310.15498v1 |
2023-10-24 | Machine learning based nonlocal kinetic energy density functional for simple metals and alloys | Developing an accurate kinetic energy density functional (KEDF) remains a
major hurdle in orbital-free density functional theory. We propose a machine
learning based physical-constrained nonlocal (MPN) KEDF and implement it with
the usage of the bulk-derived local pseudopotentials and plane wave basis sets
in the ABACU... | 2310.15591v2 |
2023-11-01 | Effect of annealing in eutectic high-entropy alloy superconductor NbScTiZr | We investigated the impact of annealing on the structural characteristics and
superconducting critical temperature ($T_\mathrm{c}$) of the eutectic
high-entropy alloy (HEA) superconductor NbScTiZr. The HEA manifests an eutectic
microstructure composed of body-centered cubic (bcc) and hexagonal close-packed
phases. Both... | 2311.00195v1 |
2023-11-06 | Interpretation of EMF data in Ag-Au-S system | The EMF dependencies for Ag-Au-S systems were analyzed and it was found that
the reactions described in reference [1] are inaccurate. Additionally, the
assumption that the equilibrium state of Au remains unchanged during the
measurement process was shown to be incorrect. Based on the EMF data provided
in White's 1957 p... | 2311.03211v2 |
2023-11-11 | Evidence of Ordering in Cu-Ni Alloys from Experimental Electronic Entropy Measurements | Phase diagrams exhibiting extended solid-solution and lens-like melting are
often reproduced using ideal solutions, where ideal mixing considers a fully
random configurational entropy of mixing. In the field of irreversible
thermodynamics, experimental measurements of the composition variation of
high-temperature elect... | 2311.06603v2 |
2023-10-01 | Estudio de materiales para la formacion de aleaciones de alta entropia utilizables en el almacenamiento de hidrogeno | In this degree work, a theoretical computational study on high entropy alloys
(HEAs) was carried out. Two specific alloys were chosen for study, AlCoCrFeNi
and TiVZrNbHf. The study was based on the parameters deduced from the
Hume-Rothery rules, thermodynamics and the configurational (or mixing) elastic
energy. The ent... | 2311.10724v3 |
2023-11-26 | On the special oxidation mechanism of a Mg-Y-Al alloy contained LPSO phase at high temperatures | This work investigated the oxidation of Mg-11Y-1Al alloy in Ar-20%O2 at
500{\deg}through multiscale characterization. The results show that the
network-like long-period stacking ordered(LPSO) phase decomposed into a
needle-like LPSO phase and a polygonal Mg24Y5 phase. The needle-like LPSO phase
resulted in the formatio... | 2311.15182v1 |
2023-11-30 | Highly sensitive magnetic properties and large linear magnetoresistance in antiferromagnetic CrxSe(0.875\lex\le1)single crystals | CrxSe (x\le1) is a class of quasi-layered binary compounds with potential
applications in spintronics due to its intriguing antiferromagnetic properties.
In this work, CrxSe single crystals with high Cr content (x=0.87, 0.91 and
0.95) were grown, and their magnetic and transport properties were investigated
in detail. ... | 2311.18349v1 |
2023-12-29 | Spin-orbit torques and magnetization switching in Gd/Fe multilayers generated by current injection in NiCu alloys | Light transition metals have recently emerged as a sustainable material class
for efficient spin-charge interconversion. We report measurements of
current-induced spin-orbit torques generated by Ni$_{1-x}$Cu$_{x}$ alloys in
perpendicularly magnetized ferrimagnetic Gd/Fe multilayers. We show that the
spin-orbit torque e... | 2312.17652v1 |
2024-01-09 | Comment on Infrared dielectric function of Ga(As,P) semiconductor alloys near the reststrahlen bands (Applied Physics Letters 123, 172102, 2023) | Though extensively studied since the emergence of zincblende cubic A(B,C)
semiconductor alloys (zb-SCA) in the sixties, the phonon mode behavior of
Ga(As,P) remains a subject of debate to this day. Recently Zollner and
co-authors reported on a thorough far-infrared (IR) ellipsometry study of the
vibrational spectra of ... | 2401.04529v1 |
2024-01-15 | Growth and Characterization of Superconducting Bulk Crystal [(SnSe)$_{1+δ}$]$_m$(NbSe$_2$) Misfit Layer Compounds | [(SnSe)$_{1+\delta}$]$_m$(NbSe$_2$) ($m$ = 1-6, 8, and 12) highly orientated
crystals 1-2 mm in size and well-defined c-planes were successfully grown using
CsCl/KCl flux, including the first growth of crystals with $m = 12$. The
stacked layers along the $c$ axis in the obtained crystals were directly
observed by trans... | 2401.07407v1 |
2024-01-22 | Machine-learning structural reconstructions for accelerated point defect calculations | Defects dictate the properties of many functional materials. To understand
the behaviour of defects and their impact on physical properties, it is
necessary to identify the most stable defect geometries. However, global
structure searching is computationally challenging for high-throughput defect
studies or materials w... | 2401.12127v1 |
2024-01-23 | Pitfalls of Exchange-Correlation Functionals in Descriptions of Magnetism: Cautionary Tale of the FeRh Alloy | The magnetic ground state of FeRh is highly sensitive towards the lattice
constant. This, in addition to partially filled d-shells of Fe and Rh, posed a
significant challenge for Density Functional Theory (DFT) calculations in the
past. Here, we have investigated the performance of various
exchange-correlation (XC) fun... | 2401.12563v1 |
2024-01-27 | Electrochemical characterization of a Fe-based shape memory alloy in an alkaline medium and the behaviour in aggressive conditions | A Fe-17Mn-6Si-19Cr-4Ni-1(V,C) shape memory steel (SMS) was characterised
electrochemically in its unstrained and pre-strained conditions. The work
focused on analysing the passive films generated in alkaline conditions, and on
the behaviour of those passive samples in various Cl/OH ratios. The passive
films were develo... | 2401.15409v1 |
2024-01-20 | Maximizing bipolar sensitivity for anomalous Nernst thermopiles in heat flux sensing in amorphous GdCo alloys | A Heat Flux Sensor (HFS) facilitates the visualization of heat flow, unlike a
temperature sensor, and is anticipated to be a key technology in managing waste
heat. Commercialized HFS devices, which are based on the Seebeck effect, are
notably expensive due to fabrication challenges and the need for sensitive
calibratio... | 2402.04259v1 |
2024-02-11 | Impact of oxygen ordering on titanium lattice parameters | Variations with oxygen concentration of titanium lattice parameters are
obtained by means of ab initio calculations, considering the impact of oxygen
ordering. The quasiharmonic approximation is used to take into account the
thermal expansion at finite temperature. Results show that lattice parameters
depend mainly on ... | 2402.07147v1 |
2024-02-12 | Superconductivity in new family of Rhenium-based binary alloys: Re$_{7}$X$_{3}$ (X = Nb, Ta, Ti, Zr, Hf) | Rhenium-based superconductors have recently attracted significant interest
due to their unconventional superconducting properties. In this work, we report
the synthesis and properties of new superconducting Re$_{7}$X$_{3}$ (X = Nb,
Ta, Ti, Zr, Hf) binary alloys which maintain a fixed composition of rhenium
while crysta... | 2402.07580v1 |
2024-02-13 | Solving Free Boundary Problems in Alloy Solidification under Universal Cooling Conditions | The kinetics of interfaces in alloy solidification pose a classic free
boundary problem. This paper introduces an approach that amalgamates the
distinctive characteristics of sharp and diffuse interface models. The motion
of the diffuse interface is governed by the phase-field equation featuring a
traveling wave functi... | 2402.08465v2 |
2024-03-03 | Grain Boundary Segregation Models for High-Entropy Alloys: Theoretical Formulation and Derived Analytical Expressions to Elucidate High-Entropy Grain Boundaries | Grain boundary (GB) segregation models are derived for multi-principal
element and high-entropy alloys (MPEAs and HEAs). Differing from classical
models where one component is taken as solvent and others are considered
solutes, these models are referenced to the bulk composition to enable improved
treatments of MPEAs a... | 2403.01603v1 |
2024-03-07 | Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying | Alloying small quantities of silver into Cu(In,Ga)Se2 was shown to improve
the efficiency for wide and low band gap solar cells. We study low band gap
industrial Cu(In,Ga)(S,Se)2 absorbers, substituting less than 10% of the copper
with silver, using absolute photoluminescence and cathodoluminescence
spectroscopy. Silve... | 2403.04394v1 |
2024-03-16 | Carrier confinement and alloy disorder exacerbate Auger-Meitner recombination in AlGaN ultraviolet light-emitting diodes | The quantum efficiency of AlGaN ultraviolet light-emitting diodes (LEDs)
declines (droops) at increasing operating powers due to Auger-Meitner
recombination (AMR). Using first-principles density-functional theory, we show
that indirect AMR mediated by electron-phonon coupling and alloy disorder can
induce bulk $C$ coef... | 2403.11019v1 |
2024-03-19 | NSGAN: A Non-Dominant Sorting Optimisation-Based Generative Adversarial Design Framework for Alloy Discovery | The design and discovery of new materials is fundamental to advancing
scientific and technological innovation. The recent emergence of the materials
genome concept holds great promise in revolutionising materials science by
enabling the systematic utilisation of data for efficient prediction and
optimisation of superio... | 2403.12495v1 |
2024-03-19 | Superconducting transition temperatures of pure vanadium and vanadium-titanium alloys in the presence of dynamical electronic correlations | Ordinary superconductors are widely assumed insensitive to small
concentrations of random nonmagnetic impurities, whereas strong disorder
suppresses superconductivity, ultimately leading to a superconductor-insulator
transition. In between these limiting cases, a most fascinating regime may
emerge where disorder enhanc... | 2403.13202v1 |
2024-03-21 | Magnetization and exchange-stiffness constants of Fe-Al-Si alloys at finite-temperatures: A first-principles study | We investigated the magnetic properties of Sendust (Fe-Al-Si) alloys not only
at 0 K but also at finite-temperatures by means of the first-principles
calculations assuming A2, B2, and DO3 structures. We confirmed that the
itinerant characteristics of 3d electrons of Fe are not negligible for A2 and
B2 structures and a ... | 2403.14096v1 |
2024-04-08 | Solute strengthening and softening from screw dislocation in BCC tantalum: A first-principles study | Improving the high-temperature performance and low-temperature plasticity of
tantalum (Ta) alloys is a significant scientific challenge. We employed
first-principles calculations to study the interaction between screw
dislocations and solute atoms in the body centered cubic (BCC) structure of Ta,
with a particular focu... | 2404.05175v1 |
2024-04-17 | An Empirical Evaluation of Pre-trained Large Language Models for Repairing Declarative Formal Specifications | Automatic Program Repair (APR) has garnered significant attention as a
practical research domain focused on automatically fixing bugs in programs.
While existing APR techniques primarily target imperative programming languages
like C and Java, there is a growing need for effective solutions applicable to
declarative so... | 2404.11050v1 |
1997-01-28 | Ni-Au: A testing ground for theories of phase stability | The theory of phase stability in the Ni-Au alloy system is a popular topic
due to the large size mismatch between Ni and Au, which makes the effects of
atomic relaxation critical, and also the fact that Ni-Au exhibits a phase
separation tendency at low temperatures, but measurements at high-temperature
show an ordering... | 9701203v1 |
2000-05-29 | Phase-field modeling of microstructural pattern formation during directional solidification of peritectic alloys without morphological instability | During the directional solidification of peritectic alloys, two stable solid
phases (parent and peritectic) grow competitively into a metastable liquid
phase of larger impurity content than either solid phase. When the parent or
both solid phases are morphologically unstable, i.e., for a small temperature
gradient/grow... | 0005507v2 |
2002-12-08 | Structural study of an amorphous NiZr2 alloy by anomalous wide angle X-ray scattering and Reverse Monte Carlo simulations | The local atomic structure of an amorphous NiZr2 alloy was investigated using
the anomalous wide-angle x-ray scattering (AWAXS), differential anomalous
scattering (DAS) and reverse Monte Carlo (RMC) simulations techniques. The
AWAXS measurements were performed at eight different incident photon energies,
including some... | 0212168v1 |
2003-10-07 | Study of coupling loss on bi-columnar BSCCO/Ag tapes by a.c. susceptibility measurements | Coupling losses were studied in composite tapes containing superconducting
material in the form of two separate stacks of densely packed filaments
embedded in a metallic matrix of Ag or Ag alloy. This kind of sample geometry
is quite favorable for studying the coupling currents and in particular the
role of superconduc... | 0310158v1 |
2004-12-13 | Atomistic simulations of dislocation mobility in Al, Ni and Al/Mg alloys | Dislocation velocities and mobilities are studied by Molecular Dynamics
simulations for edge and screw dislocations in pure aluminum and nickel, and
edge dislocations in Al-2.5%Mg and Al-5.0%Mg random substitutional alloys using
EAM potentials. In the pure materials, the velocities of all dislocations are
close to line... | 0412324v1 |
2007-08-02 | Coarse Grained Density Functional Theories for Metallic Alloys: Generalized Coherent Potential Approximations and Charge Excess Functional Theory | The class of the Generalized Coherent Potential Approximations (GCPA) to the
Density Functional Theory (DFT) is introduced within the Multiple Scattering
Theory formalism for dealing with, ordered or disordered, metallic alloys. All
GCPA theories are based on a common ansatz for the kinetic part of the
Hohenberg-Kohn f... | 0708.0340v1 |
2009-01-28 | Strong enhancement of Jc in binary and alloyed in-situ MgB2 wires by a new approach: Cold high pressure densification | Cold high pressure densification (CHPD) is presented as a new way to
substantially enhance the critical current density of in situ MgB2 wires at 4.2
and 20 K at fields between 5 and 14 T. The results on two binary MgB2 wires and
an alloyed wire with 10 wt.% B4C are presented The strongest enhancement was
measured at 20... | 0901.4546v1 |
2011-07-04 | MEAM potentials for Al, Si, Mg, Cu, and Fe alloys | A set of Modified Embedded Atom Method (MEAM) potentials for the interactions
between Al, Si, Mg, Cu, and Fe was developed from a combination of each
element's MEAM potential in order to study metal alloying. Previously published
MEAM parameters of single elements have been improved for better agreement to
the generali... | 1107.0544v6 |
2013-09-12 | Theory of local electric polarization and its relation to internal strain: impact on the polarization potential and electronic properties of group-III nitrides | We present a theory of local electric polarization in crystalline solids and
apply it to study the case of wurtzite group-III nitrides. We show that a local
value of the electric polarization, evaluated at the atomic sites, can be cast
in terms of a summation over nearest-neighbor distances and Born effective
charges. ... | 1309.3309v2 |
2014-01-16 | Engineering the Hardware/Software Interface for Robotic Platforms - A Comparison of Applied Model Checking with Prolog and Alloy | Robotic platforms serve different use cases ranging from experiments for
prototyping assistive applications up to embedded systems for realizing
cyber-physical systems in various domains. We are using 1:10 scale miniature
vehicles as a robotic platform to conduct research in the domain of
self-driving cars and collabor... | 1401.3985v1 |
2015-08-03 | Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions | The article addresses the possibility of alloy elements in MnBi which may
modify the thermodynamic stability of the NiAs-type structure without
significantly degrading the magnetic properties. The addition of small amounts
of Rh and Mn provides an improvement in the thermal stability with some
degradation of the magnet... | 1508.00473v1 |
2015-09-15 | Beyond packing of hard spheres: The effects of core softness, non-additivity, intermediate-range repulsion, and many-body interactions on the glass-forming ability of bulk metallic glasses | When a liquid is cooled well below its melting temperature at a rate that
exceeds the critical cooling rate $R_c$, the crystalline state is bypassed and
an amorphous glassy state forms instead. $R_c$ (or the corresponding critical
casting thickness $d_c$) characterizes the glass-forming ability (GFA) of each
material. ... | 1509.04731v1 |
2015-09-23 | Structural, electronic, and optical properties of $m$-plane InGaN/GaN quantum wells: Insights from experiment and atomistic theory | In this paper we present a detailed analysis of the structural, electronic,
and optical properties of an $m$-plane (In,Ga)N/GaN quantum well structure
grown by metal organic vapor phase epitaxy. The sample has been structurally
characterized by x-ray diffraction, scanning transmission electron microscopy,
and 3D atom p... | 1509.07099v2 |
2015-11-17 | Spin Dynamics of Complex Oxides, Bismuth-Antimony Alloys, and Bismuth Chalcogenides | This thesis predicts that two types of material families could be a solution
to the challenges in spintronics: complex oxides and bismuth based materials.
We derive a general approach for constructing an effective spin-orbit
Hamiltonian, which applies to all nonmagnetic materials. We also verify this
formalism through ... | 1511.05276v1 |
2016-02-12 | Spin-dependent recombination in GaAs(1-x)N(x) alloys at oblique magnetic field | We have studied experimentally and theoretically the optical orientation and
spin-dependent Shockley-Read-Hall recombination in a semiconductor in a
magnetic field at an arbitrary angle between the field and circularly polarized
exciting beam. The experiments are performed at room temperature in GaAsN
alloys where deep... | 1602.04162v2 |
2016-07-19 | Effect of 0.25 and 2.0 MeV He-ion irradiation on short-range ordering in model (EFDA) Fe-Cr alloys | The effect of He+ ion irradiation on a distribution of Cr atoms in model
(EFDA) Fe(100-x)Cr(x) (x=5.8, 10.75, 15.15) was studied by means of conversion
electrons Mossbauer spectroscopy. The alloys were irradiated to the dose of
1.2E16 ions per cm2 (7.5 dpa) with He+ of 0.25 and 2.0 MeV. The distribution of
Cr atoms wit... | 1607.05456v2 |
2018-03-01 | Conductance relaxation in GeBiTe - slow thermalization in an open quantum system | This work describes the microstructure and transport properties of GeBiTe
films with emphasis on their out-of-equilibrium behavior.
Persistent-photoconductivity (PPC), previously studied in the phase-change
compound GeSbTe is also quite prominent in this system. Much weaker PPC
response is observed in the pure GeTe com... | 1803.00564v1 |
2018-05-24 | The Kinetics of Primary Alpha Plate Growth in Titanium Alloys | The kinetics of primary alpha-Ti colony/Widmanstatten plate growth from the
beta are examined, comparing model to experiment. The plate growth velocity
depends sensitively both on the diffusivity D(T) of the rate-limiting species
and on the supersaturation around the growing plate. These result in a maxima
in growth ve... | 1805.09885v2 |
2018-07-09 | SiAl Alloy Feedhorn Arrays: Material Properties, Feedhorn Design, and Astrophysical Applications | We present here a study of the use of the SiAl alloy CE7 for the packaging of
silicon devices at cryogenic temperatures. We report on the development of
baseplates and feedhorn arrays for millimeter wave bolometric detectors for
astrophysics. Existing interfaces to such detectors are typically made either
of metals, wh... | 1807.03398v1 |
2018-07-11 | Segregation assisted grain boundary precipitation in a model Al-Zn-Mg-Cu alloy | Understanding the composition evolution of grain boundaries and grain
boundary precipitation at near-atomic scale in aluminum alloys is crucial to
tailor mechanical properties and to increase resistance to corrosion and stress
corrosion cracking. Here, we elucidate the sequence of precipitation on grain
boundaries in c... | 1807.03996v1 |
2012-09-18 | Nuclear quadrupole interactions of 111In/Cd solute atoms in a series of rare-earth palladium alloys | Nuclear quadrupole interactions were measured at 111In/Cd probe atoms in
rare-earth palladium phases RPd3 having the L12 structure using the technique
of perturbed angular correlation of gamma rays (PAC). Measurements were made
for pairs of samples having compositions of the Pd-poorer and Pd-rich
boundaries of the RPd3... | 1209.3822v3 |
2018-08-08 | A Correlative Four-Dimensional Study of Phase Separation at the Subnanoscale to Nanoscale of a Ni-Al Alloy | The temporal evolution of ordered gamma prime (L12)-precipitates
precipitating in a disordered gamma(f.c.c.) matrix is studied in extensive
detail for a Ni-12.5 Al at.% alloy aged at 823 K (550 oC), for times ranging
from 0.08 to 4096 h. Three-dimensional atom-probe tomography (3-D APT) results
are compared to monovaca... | 1808.02629v2 |
2022-02-04 | Microstructural pattern formation during liquid metal dealloying: Phase-field simulations and theoretical analyses | In recent years, liquid metal dealloying (LMD) has emerged as a promising
material processing method to generate micro and nano-scale bicontinuous or
porous structures. Most previous studies focused on the experimental
characterization of the dealloying process and on the properties of the
dealloyed materials, leaving ... | 2202.01984v2 |
2022-03-28 | The effect of $f$-$c$ hybridization on the $γ\rightarrowα$ phase transition of cerium studied by lanthanum doping | The hybridization between the localized 4$f$ level ($f$) with conduction
($c$) states in $\gamma$-Ce upon cooling has been previously revealed in single
crystalline thin films experimentally and theoretically, whereas its influence
on the $\gamma\rightarrow\alpha$ phase transition was not explicitly verified,
due to th... | 2203.14490v1 |
2017-02-07 | Annealing of Au, Ag and Au-Ag alloy nanoparticle arrays on GaAs (100) and (111)B | Part of developing new strategies for fabrications of nanowire structures
involves in many cases the aid of metal nanoparticles (NPs). It is highly
beneficial if one can define both diameter and position of the initial NPs and
make well-defined nanowire arrays. This sets additional requirement on the NPs
with respect t... | 1702.01990v1 |
2017-10-25 | High-temperature cyclic oxidation kinetics and microstructural transition mechanisms of Ti-6Al-4V composites reinforced with hybrid (TiC+TiB) networks | The microstructural features and high-temperature oxidation resistance of
hybrid (TiC+TiB) networks reinforced Ti-6Al-4V composites were investigated
after fabricated with reaction hot pressing technique. The inhomogeneous
distribution of hybrid reinforcers resulted in a sort of stress-induced grain
refinement for {\al... | 1710.09315v1 |
2019-08-21 | Fatigue-resistant high-performance elastocaloric materials via additive manufacturing | Elastocaloric cooling, which exploits the latent heat released and absorbed
as stress-induced phase transformations are reversibly cycled in shape memory
alloys, has recently emerged as a frontrunner in non-vapor-compression cooling
technologies. The intrinsically high thermodynamic efficiency of elastocaloric
material... | 1908.07900v1 |
2019-08-27 | A combinatorial guide to phase formation and surface passivation of tungsten titanium oxide prepared by thermal oxidation | TiO$_2$ and WO$_3$ are two of the most important earth-abundant electronic
materials with applications in countless industries. Recently alloys of WO$_3$
and TiO$_2$ have been investigated leading to improvements of key performance
indicators for a variety of applications ranging from photo-electrochemical
water splitt... | 1908.10067v1 |
2020-09-05 | Corrosion Resistance of Sulfur-Selenium Alloy Coatings | Despite decades of research, metallic corrosion remains a long-standing
challenge in many engineering applications. Specifically, designing a material
that can resist corrosion both in abiotic as well as biotic environments
remains elusive. Here we design a lightweight sulfur-selenium (S-Se) alloy with
high stiffness a... | 2009.02451v1 |
2020-09-15 | Atomistic Modelling of Functionally Graded Cu-Ni Alloy and its Implication on the Mechanical Properties of Nanowires | Functionally graded materials (FGM) eliminate the stress singularity in the
interface between two different materials and therefore have a wide range of
applications in high temperature environments such as engines, nuclear
reactors, spacecrafts etc. Therefore, it is essential to study the mechanical
properties of diff... | 2009.06873v1 |
2020-10-09 | Understanding Cu Incorporation in the $\mathrm{Cu_{2x}Hg_{2-x}GeTe_4}$ Structure using Resonant X-ray Diffraction | The ability to control carrier concentration based on the extent of Cu
solubility in the $\mathrm{Cu_{2x}Hg_{2-x}GeTe_4}$ alloy compound (where 0
$\leq$ x $\leq$ 1) makes $\mathrm{Cu_{2x}Hg_{2-x}GeTe_4}$ an interesting case
study in the field of thermoelectrics. While Cu clearly plays a role in this
process, it is unkn... | 2010.04784v1 |
2020-12-11 | Improving fretting corrosion resistance of CoCrMo alloy with TiSiN and ZrN coatings for orthopedic applications | Total hip replacement is the most effective treatment for late stage
osteoarthritis. However, adverse local tissue reactions (ALTRs) associated with
fretting corrosion have been observed in patients with modular total hip
implants. The purpose of this study is to increase the fretting corrosion
resistance of the CoCrMo... | 2012.06614v1 |
2020-12-05 | Machine Learning and Data Analytics for Design and Manufacturing of High-Entropy Materials Exhibiting Mechanical or Fatigue Properties of Interest | This chapter presents an innovative framework for the application of machine
learning and data analytics for the identification of alloys or composites
exhibiting certain desired properties of interest. The main focus is on alloys
and composites with large composition spaces for structural materials. Such
alloys or com... | 2012.07583v1 |
2021-02-02 | First principles model for voids decorated by transmutation solutes: Short-range order effects and application to neutron irradiated tungsten | Understanding how properties of materials change due to nuclear
transmutations is a major challenge for the design of structural components for
a fusion power plant. In this study, by combining a first-principles matrix
Hamiltonian approach with thermodynamic integration we investigate quasi-steady
state configurations... | 2102.01614v1 |
2021-02-13 | Atomic-scale investigation of the irradiation-resistant effect of symmetric tilt grain boundaries of Fe-Ni-Cr alloy | In this paper, the Fe-20Ni-25Cr alloy that is used for fuel cladding or
pressure vessels with various grain boundaries (GBs) was investigated by
employing molecular dynamics simulations. The bi-crystals comprised of
{\Sigma}3(111), {\Sigma}3(112), {\Sigma}9(114), {\Sigma}11(113),
{\Sigma}19(116), and {\Sigma}17(223) ty... | 2102.06907v1 |
2021-02-19 | Thermal and Oxidation Stability of Ti$_x$W$_{1-x}$ Diffusion Barriers Investigated by Soft and Hard X-ray Photoelectron Spectroscopy | The binary alloy of titanium-tungsten (TiW) is an established diffusion
barrier in high-power semiconductor devices, owing to its ability to suppress
the diffusion of copper from the metallisation scheme into the surrounding
silicon substructure. However, little is known about the response of TiW to
high temperature ev... | 2102.09845v1 |
2021-04-22 | An End-to-End Computer Vision Methodology for Quantitative Metallography | Metallography is crucial for a proper assessment of material's properties. It
involves mainly the investigation of spatial distribution of grains and the
occurrence and characteristics of inclusions or precipitates. This work
presents an holistic artificial intelligence model for Anomaly Detection that
automatically qu... | 2104.11159v3 |
2021-08-31 | Toward 100% Spin-Orbit Torque Efficiency with High Spin-Orbital Hall Conductivity Pt-Cr Alloys | 5d transition metal Pt is the canonical spin Hall material for efficient
generation of spin-orbit torques (SOTs) in Pt/ferromagnetic layer (FM)
heterostructures. However, for a long while with tremendous engineering
endeavors, the damping-like SOT efficiencies (${\xi}_{DL}$) of Pt and Pt alloys
have still been limited ... | 2108.13857v3 |
2021-10-10 | Precipitation in lean Mg-Zn-Ca alloys | While lean Mg-Zn-Ca alloys are promising materials for temporary implants,
questions remain on the impact of Zn and Ca. In this context, the precipitation
in Mg-1.5Zn-0.25Ca (ZX20, in wt.%) was investigated upon linear heating from
about room temperature to 400 C, with a particular focus on the debated ternary
precipit... | 2110.04895v1 |
2021-10-23 | Robust evidence for the stabilization of the premartensite phase in Ni-Mn-In magnetic shape memory alloys by chemical pressure | The thermodynamic stability of the premartensite (PM) phase has been a topic
of extensive investigation in shape memory alloys as it affects the main
martensite phase transition and the related physical properties. In general,
the PM phase is stable over a rather narrow temperature-composition range. We
present here ev... | 2110.12154v2 |
2021-11-01 | A New Class of Alumina-Forming Superalloy for 3D Printing | A new class of crack-resistant nickel-based superalloy containing high
$\gamma^\prime$ fraction is studied for the laser-powder bed fusion (L-PBF)
process. The effects of the (Nb+Ta)/Al ratio is emphasised, a strategy that is
shown to confer excellent low-temperature strength whilst maintaining oxidation
resistance at ... | 2111.01049v1 |
2021-11-04 | Phase-transition-induced giant Thomson effect for thermoelectric cooling | The Seebeck and Peltier effects have been widely studied and used in various
thermoelectric technologies, including thermal energy harvesting and
solid-state heat pumps. However, basic and applied studies on the Thomson
effect, another fundamental thermoelectric effect in conductors, are limited
despite the fact that t... | 2111.02707v2 |
2022-01-10 | Alloyed B-(AlxGa1-x)2O3 bulk Czochralski single B-(Al0.1Ga0.9)2O3 and polycrystals B-(Al0.33Ga0.66)2O3, B-(Al0.5Ga0.5)2O3), and property trends | In this work, bulk Czochralski-grown single crystals of 10 mol. % Al2O3
alloyed B-Ga2O3 - monoclinic 10% AGO or B-(Al0.1Ga0.9)2O3 - are obtained, which
show +0.20 eV increase in the bandgap compared with unintentionally doped
B-Ga2O3. Further, growths of 33% AGO - B-(Al0.33Ga0.67)2O3 - and 50% AGO -
B-(Al0.5Ga0.5)2O3 o... | 2201.03673v2 |
2022-05-06 | Co-evolution of point defects and Cr-rich nano-phase in binary Fe-20 at.% Cr alloy: A comprehensive investigation using positron annihilation spectroscopy and atom probe tomography | The role of point defects in temporal evolution of Cr-rich alpha-prime phase
separation in binary Fe-20 at.% Cr alloy is elucidated by intercepting the long
term (upto 1000 h at 773 K) aging at regular intervals and probing by a
combination of atom probe tomography (APT) and positron annihilation
spectroscopy (PAS). Si... | 2205.03434v1 |
2022-06-08 | Combined modeling and experimental characterization of Mn segregation and spinodal decomposition along dislocation lines in Fe-Mn alloys | Mn enrichment at dislocations in Fe-Mn alloys due to segregation and spinodal
decomposition along the dislocation line is studied via modeling and
experimental characterization. To model these phenomena, both
finite-deformation microscopic phase-field chemomechanics (MPFCM) and Monte
Carlo molecular dynamics (MCMD) are... | 2206.03767v1 |
2022-07-07 | Investigations on the multi-sector hard X-Band Structures | The development of high gradient accelerating structures is one of the
leading activities of the accelerator community. In the technological research
of new construction methods for these devices, high-power testing is a critical
step for the verification of their viability. Recent experiments showed that
accelerating ... | 2207.03601v1 |
2022-10-22 | Dislocation plasticity in equiatomic NiCoCr alloys: The effect of short-range order | Equiatomic NiCoCr solid solutions have been recently shown to display
exceptional mechanical properties, that have been suggested to be linked to
nanostructural short-range order (SRO) features that may arise from thermal
treatments, such as annealing or/and aging. Here, we use hybrid Monte
Carlo-Molecular Dynamics sim... | 2210.12512v1 |
2022-11-10 | Phase formation in CrFeCoNi nitride thin films | As a single-phase alloy, CrFeCoNi is a face centered cubic (fcc) material
related to the archetypical high-entropy Cantor alloy CrFeCoNiMn. For thin
films, CrFeCoNi of approximately equimolar composition tends to assume an fcc
structure when grown at room temperature by magnetron sputtering. However, the
single-phase s... | 2211.05471v1 |
2023-01-04 | An efficient and quantitative phase-field model for elastically heterogeneous two-phase solids based on a partial rank-one homogenization scheme | This paper presents an efficient and quantitative phase-field model for
elastically heterogeneous alloys that ensures the two mechanical
compatibilities$\unicode{x2014}$static and kinematic, in conjunction with
chemical equilibrium within the interfacial region. Our model contrasts with
existing phase-field models that... | 2301.01746v1 |
2023-03-03 | Vibrational and mechanical properties of the highly mismatched (Cd,Be)Te semiconductor alloy : Experiment and ab initio calculations | The (Cd, Be)Te semiconductor alloy that exhibits a dramatic mismatch in bond
covalency and stiffness clarifying its vibrational and mechanical properties is
used as a benchmark to test the limits of the percolation model (PM) worked out
to explain the complex Raman spectra of the related but less contrasted (Zn,
Be) ch... | 2303.01780v1 |
2023-09-25 | Rapid Quantification of Dynamic and Spall Strength of Metals Across Strain Rates | The response of metals and their microstructures under extreme dynamic
conditions can be markedly different from that under quasistatic conditions.
Traditionally, high strain rates and shock stresses are measured using
cumbersome and expensive methods such as the Kolsky bar or large spall
experiments. These methods are... | 2309.14296v1 |
2023-09-30 | The Impact of Cooling Rate on the Tensile and Cyclic Stress-Strain Characteristics of Different Solder Alloys at Nanoscale | In recent years, lead-free solder alloys based on tin, silver, or copper have
gained popularity over lead-based solder alloys due to their improved
mechanical and electrical properties and their non-toxic nature. In our
previous studies, we examined the stress-strain behavior of SAC305 under
varying cooling rates. This... | 2310.00440v2 |
2023-10-19 | Limits of dispersoid size and number density in oxide dispersion strengthened alloys fabricated with powder bed fusion-laser beam | Previous work on additively-manufactured oxide dispersion strengthened alloys
focused on experimental approaches, resulting in larger dispersoid sizes and
lower number densities than can be achieved with conventional powder
metallurgy. To improve the as-fabricated microstructure, this work integrates
experiments with a... | 2310.12416v3 |
2023-10-23 | Mass uptake during oxidation of metallic alloys: literature data collection, analysis, and FAIR sharing | The area-normalized change of mass ($\Delta$m/A) with time during the
oxidation of metallic alloys is commonly used to assess oxidation resistance.
Analyses of such data can also aid in evaluating underlying oxidation
mechanisms. We performed an exhaustive literature search and digitized
normalized mass change vs. time... | 2310.15083v1 |
2024-01-12 | Rapid screening of molecular beam epitaxy conditions for monoclinic (InxGa1-x)2O3 alloys | Molecular beam epitaxy is one of the highest quality growth methods, capable
of achieving theoretical material property limits and unprecedented device
performance. However, such ultimate quality usually comes at the cost of
painstaking optimization of synthesis conditions and slow experimental
iteration rates. Here we... | 2401.06606v1 |
2006-06-20 | Experimental evidence for magnetorotational instability in a helical magnetic field | A recent paper [R. Hollerbach and G. Rudiger, Phys. Rev. Lett. 95, 124501
(2005)] has shown that the threshold for the onset of the magnetorotational
instability (MRI) in a Taylor-Couette flow is dramatically reduced if both
axial and azimuthal magnetic fields are imposed. In agreement with this
prediction, we present ... | 0606473v1 |
2007-01-02 | Experiments on the magnetorotational instability in helical magnetic fields | The magnetorotational instability (MRI) plays a key role in the formation of
stars and black holes, by enabling outward angular momentum transport in
accretion disks. The use of combined axial and azimuthal magnetic fields allows
the investigation of this effect in liquid metal flows at moderate Reynolds and
Hartmann n... | 0701030v1 |
1993-10-21 | An Aggregation Model for Electrochemical Depostition and its Application to Cop Dendritic Growth | We introduce an aggregation model for general electrochemical deposition
experiments. Its most relevant feature is that it includes the overall effect
of strong applied electric fields and therefore applies to non-equilibrium
situations. We compare our model to experiments on CoP dendritic growth with
very good agreeme... | 9310051v1 |
1994-05-12 | Flow equations for the Anderson Hamiltonian | Using a continuous unitary transformation recently proposed by Wegner
\cite{Wegner} together with an approximation that neglects irrelevant
contributions, we obtain flow equations for Hamiltonians. These flow equations
yield a diagonal or almost diagonal Hamiltonian. As an example we investigate
the Anderson Hamiltonia... | 9405034v2 |
1994-06-02 | Magetic softening of Young's modulus of amorphous Fe90Zr10 | The Young's modulus and the internal friction of amorphous Fe$_{90}$Zr$_{10}$
alloy were measured near the Curie temperature using the vibrating reed
technique. The modulus shows softening around $T_c\approx 227K$ and the
internal friction undergoes drastic increase at $T_c$. It is found that both
the Young's modulus a... | 9406008v1 |
1994-07-25 | Magnetic phase diagram of the Hubbard model | The competition between commensurate and incommensurate spin-density-wave
phases in the infinite-dimensional single-band Hubbard model is examined with
quantum Monte Carlo simulation and strong and weak coupling approximations.
Quantum fluctuations modify the weak-coupling phase diagram by factors of order
unity and pr... | 9407101v1 |
1995-09-01 | Optical properties of arrays of quantum dots with internal disorder | Optical properties of large arrays of isolated quantum dots are discussed in
order to interpret the existent photoluminescence data. The presented theory
explains the large observed shift between the lowest emission and absorption
energies as the average distance between the ground and first excited states of
the dots.... | 9508149v1 |
1995-11-10 | Quantitative Analysis of a Fracture Surface by Atomic Force Microscopy | The fracture surface of a Ti3Al-based alloy is studied using both an atomic
force microscope and a standard scanning electron microscope. Results are shown
to be quantitatively comparable. Two fracture regimes are observed. It is shown
in particular that the roughness index characterizing the small lengthscales
regime ... | 9511048v2 |
1996-04-05 | Magnetic Phase Diagram of Hubbard Model in Three Dimensions: the Second-Order Local Approximation | A local, second-order (truncated) approximation is applied to the Hubbard
model in three dimensions. Lowering the temperature, at half-filling, the
paramagnetic ground state becomes unstable towards the formation of a
commensurate spin-density-wave (SDW) state (antiferromagnetism) and
sufficiently far away from half-fi... | 9604039v1 |
1996-07-02 | Gap States in Dilute Magnetic Alloy Superconductors | We study states in the superconducting gap induced by magnetic impurities
using self-consistent quantum Monte Carlo with maximum entropy and formally
exact analytic continuation methods. The magnetic impurity susceptibility has
different characteristics for $T_{0} \alt T_{c0}$ and $T_{0} \agt T_{c0}$
($T_{0}$: Kondo te... | 9607012v1 |
1996-07-08 | Scaling Properties of Localization Length in 1D Paired Correlated Binary Alloys of Finite Size | We study scaling properties of the localized eigenstates of the random dimer
model in which pairs of local site energies are assigned at random in a one
dimensional disordered tight-binding model. We use both the transfer matrix
method and the direct diagonalization of the Hamiltonian in order to find how
the localizat... | 9607055v1 |
1996-09-05 | Nonuniversal scaling behavior of Barkhausen noise | We simulate Barkhausen avalanches on fractal clusters in a two-dimensional
diluted Ising ferromagnet with an effective Gaussian random field. We vary the
concentration of defect sites $c$ and find a scaling region for moderate
disorder, where the distribution of avalanche sizes has the form $D(s,c,L) =
s^{-(1+\tau (c))... | 9609050v1 |
1996-12-04 | Dynamics of Electrons in Graded Semiconductors | I present a theory of electron dynamics in semiconductors with slowly varying
composition. I show that the frequency-dependent conductivity, required for the
description of transport and optical properties, can be obtained from a
knowledge of the band structures and momentum matrix elements of homogeneous
semiconductor... | 9612049v1 |
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