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  • shape-memory
  • We shall mainly review two types of phase-field models, formulated recently by Alber and the first author of this article, for solid-solid phase transitions driven by configurational forces, with applications to martensitic phase transitions in, e.g. smart materials like shape memory alloys, and to sintering which is a process in, for instance, powder metallurgy. (springer.com)
  • electron
  • Different techniques were employed to study the phase separation in model alloys and commercial DSSs, including atom probe tomography, transmission electron microscopy and micro-hardness test. (diva-portal.org)
  • Herein, we apply a dual tomography approach, where correlative scanning transmission electron microscopy (STEM) energy-dispersive X-ray spectroscopic (EDS) tomography and atom probe tomography (APT) are used to investigate the initial phase separation process of an alnico 8 alloy upon non-magnetic annealing. (osti.gov)
  • The focus of this research is on temporal evolution of the nucleation, growth and coarsening gamma-prime (L12 structure) precipitates in Ni-Al alloys utilizing three-dimensional atom-probe tomography, scanning and transmission electron microscopies, monovacancy mediated lattice-kinetics Monte Carlo simulations. (northwestern.edu)
  • WANG X, CHAUVAT M-P, RUTERANA P & WALTHER T (2017) Effective absorption correction for energy dispersive X-ray mapping in a scanning transmission electron microscope: analysing the local indium distribution in rough samples of InGaN alloy layers . (sheffield.ac.uk)
  • Walther T, Wang X, Angadi VC, Ruterana P, Longo P & Aoki T (2017) Study of phase separation in an InGaN alloy by electron energy loss spectroscopy in an aberration corrected monochromated scanning transmission electron microscope . (sheffield.ac.uk)
  • Independent characterization techniques, namely x-ray diffraction, thermomechanical analysis, and electron microscopy, confirm that Ni-rich phases develop upon sintering in a way that enhances consolidation. (sams-studio.com)
  • spectra
  • Comparison with spectra of disordered samples of the same alloy composition has enabled a determination of the band gap reduction due to ordering. (unt.edu)
  • First-Principles Theory of Competing Order Types, Phase Separation, and Phonon Spectra in Thermoelectric AgPbmSbTem+2 Alloys. (liu.se)
  • This change of symmetry should manifest itself in the changes in the Raman spectra of these alloys. (tms.org)
  • behaviour
  • Differential scanning calorimetry (DSC) and other methods of thermal analysis provide a lot of information about phase behaviour and physical properties of heterogeneous systems. (springer.com)
  • grown
  • Spontaneous ordering of ternary alloys grown on misoriented substrates has been of recent interest. (unt.edu)
  • K. Dileep, R. Sahu, K. K. Nagaraja and Ranjan Datta, Crystallographic phase separation and band gap of ZnO 1-x S x (x = 0.1-0.3) alloy thin films grown by pulsed laser deposition, Journal of Crystal Growth 402 , 124 - 129 (2014). (jncasr.ac.in)
  • metastable
  • Using our analytic potential of mean force and Barker-Henderson perturbation theory, we obtain phase diagrams for lysozyme solutions that include stable and metastable fluid-fluid and solid-fluid phases when the electrolyte is 0.2 M NaSCN or NaI or NaCl. (unt.edu)
  • Solidification of Co-Cu alloys in the metastable miscibility gap under low gravity conditions in: Solidification and Gravity IV, Hrsg. (dlr.de)
  • Dynamics
  • For instance, the evolution in time of an interface that separates two materials in the same state arise naturally in hydrodynamics (multi-fluids) while the dynamics of an interface that separates the same material in different states (multi-phases) arise naturally in material science in some processes like solidification or melting. (springer.com)
  • Shaista Ahmad, Sanjay Puri and Subir K. Das, Phase Separation of Fluids in Porous Media: A molecular dynamics study, Rapid Communication in Physical Review E 90 , 040302 (2014). (jncasr.ac.in)
  • Subir K. Das, Sergei A. Egorov, Benjamin Trefz, Peter Virnau and Kurt Binder, Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory, Physical Review Letters 112 , 198301 (2014). (jncasr.ac.in)
  • temperatures
  • This imaging technique could potentially allow for observation of immiscible liquid phases becoming miscible at specific temperatures, which cannot be observed with ex-situ analysis of solidified structures. (mdpi.com)
  • The highest operating temperature of commercial Al alloys in about 463 K. We have developed Al alloys that can operate at temperatures as high as 698 K for extended periods of time. (northwestern.edu)
  • Exploring new high-pressure phases of methane hydrate at above megabar and high temperatures and its relationship to symmetrization of hydrogen bond. (or.jp)
  • G. Singh, G. Bajargan, Ranjan Datta, and U. Ramamurty, Deformation and strength of Ti-6Al-4V alloyed with B at cryogenic temperatures, Materials Science and Engineering A 611 , 45 - 57 (2014). (jncasr.ac.in)
  • characterization
  • The neutron imaging of the solidification process may resolve questions about phase separation that occurs in these alloys and those that contain Cu. These results show that neutron imaging can be utilized as a characterization technique for solidification research with the potential for imaging the liquid phases of more complex alloys, such as the HEAs which have very little published data about their liquid phases. (mdpi.com)
  • composition
  • We find that most added TM ternaries induce an important quasi-linear increase in the SISF energy as a function of alloying composition x . (sams-studio.com)
  • Studies on surface structure, morphology and composition of Co-W alloy. (nal.res.in)
  • extent of phase separation
  • The extent of phase separation, i.e., amplitude and wavelength, has been quantitatively assessed using the Langer-Bar-on-Miller, proximity histogram, and autocorrelation function methods for two separate Fe-Cr alloys, designated 2101 and 2205. (osti.gov)
  • Transitions
  • Langer, J.S.: Models of pattern formation in first-order phase transitions. (springer.com)
  • The refined didactical approach with a streamlined presentation now allows readers to grasp the kinetic concepts even more easily, coherently introducing the field of kinetic processes, especially those involved in crystal growth, and explaining such phenomena as diffusion, nucleation, segregation and phase transitions at a level accessible to graduate students. (wiley.com)
  • Simulations
  • High-throughput quantum mechanics based simulations have been carried out to establish the change in lattice parameter and superlattice intrinsic stacking fault (SISF) formation energies in Ni 3 Al-based alloys using the axial Ising model. (sams-studio.com)
  • phenomena
  • In addition, the results indicate that the mechanical properties are highly connected with the phase separation in ferrite and other phenomena, such as Ni-Mn-Si-Cu clusters, that can also deteriorate the mechanical properties. (diva-portal.org)
  • Phase-field approach is a young, however, has now emerged as a powerful tool in theoretical and numerical analysis of phenomena at the meso-scale, therefore it has important applications to MGI. (springer.com)
  • This idea can be traced to van der Waals [ 63 ], and is the foundation for the phase-field theory for phase transition and critical phenomena. (springer.com)
  • embrittlement
  • However, as a consequence of their ferrite content, DSSs are sensitive to the so-called '475°C embrittlement', which is induced by phase separation, namely, the ferrite decomposed into Fe-rich ferrite (α) and Cr-rich ferrite (α'), respectively. (diva-portal.org)
  • deformation
  • These are some examples but we can find a big amount of applications where we need to model mixtures of different fluids, solids or gas, due to its connection with many physically motivated problems such as phase separation, Liquid Crystals, Vesicle Membranes deformation, image processing, tumor growth. (springer.com)
  • diagrams
  • Chart issued by the U.S. National Bureau of Standards illustrating the systematic relationships between phase diagrams of transition elements. (unt.edu)
  • The equilibrium state of semicrystalline polymer-solvent mixtures is presented by depiction with the phase diagrams as shown in Figure 1. (springer.com)
  • temperature
  • The aim of this research project is to increase the maximum operating temperature aluminum alloys. (northwestern.edu)
  • When the processing requirements of both supersaturation and nanocrystallinity are met in the initial powders, Cr-Ni alloys show an onset of sintering at a low temperature and a rapid rate of densification. (sams-studio.com)
  • 2507
  • The results show that the kinetics of phase separation (PS) in grade 2507 is faster than that in grade 2205, leading to greater hardening and deterioration in toughness for grade 2507 compared to 2205. (diva-portal.org)
  • Metals
  • The premise behind the addition of the third and fourth refractory metals Ti and Zr is to increase the number of hard and wear resistant phases while maintaining solid lubrication with ZnO. (unt.edu)
  • structures
  • Special attention will be given to the QCD critical point and the first order co-existence region, and we will discuss how the measurement of fluctuations and correlations can help in an experimental search for non-trivial structures in the QCD phase diagram. (unt.edu)
  • early stages
  • SANS was shown to be very sensitive to the nanostructure change caused by PS and capable of characterizing the early stages of PS in Fe-Cr alloys. (diva-portal.org)
  • thermal
  • Analytical, x-ray, thermal, and metallographic data have been obtained in the study of the magnesium-uranium system, and a proposed phase diagram has been constructed. (unt.edu)
  • density
  • After annealing for 10 000 h, the number density of the G-phase within the 2205 alloy was found to be roughly one order of magnitude higher than in the 2101 alloy. (osti.gov)
  • stoichiometry
  • Based on the calculated energies, the conclusion is made that Zr substitution on the Sri sites takes place in the Zr 4 Sn phase, which accounts for the unusual stoichiometry of this Cr 3 Si structure type compound. (diva-portal.org)