• The most commonly investigated high entropy alloy, AlCoCrCuFeNi, has been chosen for optimization of its microstructural and mechanical properties by means of compositional changes and heat treatments. (mdpi.com)
  • The two microstructural phases present in the alloy (described as a light grey phase and a dark grey phase in the patent, due to contrast under a scanning electron microscope) were found to have significantly different lattice constants (3.59Å versus 6.68Å) leading the inventors to posit that severe distortions of the crystalline network are behind an increased wear resistance as compared to single-phase alloys. (iom3.org)
  • The microstructural features have been compared with those obtained by phase field modeling. (intechopen.com)
  • A.I. Bazlov et al, Thermo-mechanical processing of a Zr62.5Cu22.5Fe5Al10 glassy alloy as a way to obtain tensile ductility, Journal of Alloys and Compounds (2020). (phys.org)
  • Dr Michael Ford MIMMM at Haseltine Lake Kempner explores a patent for wear and corrosion-resistant high-entropy alloys. (iom3.org)
  • It describes high-entropy alloys that appear to combine both good hardness and corrosion-resistant properties, making them suitable for use in hazardous conditions. (iom3.org)
  • In contrast, high-entropy alloys combine multiple elements in roughly equal, or at least relatively large, proportions. (iom3.org)
  • For instance, some high-entropy alloys have been found to form substitutional solid solutions even though the Hume-Rothery rules might predict phase separation due to differences in elemental crystal structure. (iom3.org)
  • According to the patent, high-entropy alloys meeting this definition exhibit advantageously high hardness and high wear resistance, combined with good corrosion resistance, making them suitable for use in the presence of corrosive solutions such as salt water, acid or alkali. (iom3.org)
  • The alloy has a dual-phase microstructure consisting of first and second face-centred cubic phases, where the first phase has a higher nickel content and lower content of silicon, manganese and chromium than the second phase. (iom3.org)
  • In the as-clad coating layer, the inhomogeneous eutectoid microstructure due to incomplete phase separation into two intermetallic phases Ni3Al and Ni3V took place. (elsevierpure.com)
  • In the coating layer annealed at 1553 K for 5 h, a dual two-phase microstructure composed of the primary cuboidal Ni3Al surrounded by the channel regions in which the major constituent is the Ni3V phase was observed, indicating that the complete eutectoid microstructure was developed. (elsevierpure.com)
  • In the coating layer annealed at 1248 K for 24 h, the developed microstructure was lamellar-like one composed of the Ni3Al and Ni3V phases. (elsevierpure.com)
  • X-ray diffraction (XRD) study reveals two broad diffuse peaks corresponding to the coexistence of two amorphous phases. (intechopen.com)
  • Thus, the phase separation in Ce75Al25 − xGax is taking place, owing to the formation of two types of amorphous phases having localized and delocalized 4f electrons of Ce atoms, respectively. (intechopen.com)
  • Some previous high-pressure experiments used diamond-anvil cells to form amorphous phases from other crystalline materials, with much smaller sample sizes of a few thousandths of a millimeter. (scienceblog.com)
  • In the conducted study, the kinetics of phase growth in the Cu-Sn-Cu system under conditions of isothermal annealing at a temperature (250°C) were investigated. (edu.ua)
  • We introduce a continuum model to describe the phase separation of a binary alloy in the presence of mobile dislocations. (princeton.edu)
  • Haataja, M & Léonard, F 2004, ' Influence of mobile dislocations on phase separation in binary alloys ', Physical Review B - Condensed Matter and Materials Physics , vol. 69, no. 8. (princeton.edu)
  • Such contemporary multi-component alloys have been found to exhibit different thermodynamic behaviours and physical properties than might be expected by applying conventional alloying rules developed from the study of binary or ternary. (iom3.org)
  • Energy of formation for AgIn liquid binary alloys along the l. (iaea.org)
  • Numerical simulations of phase separation in Fe-Cr-Ni ternary alloys and Fe-Cr-Mo-Ni quaternary alloys similar to ferrite phases in duplex stainless steels were performed with using of the Cahn-Hilliard equations. (elsevierpure.com)
  • We obtained that small addition of Ni retard phase separation of Cr in Fe-Cr-Ni ternary alloys. (elsevierpure.com)
  • The simulation results on behavior of Mo and Ni in Fe-Cr-Mo-Ni ternary alloys were quite similar to Mo in Fe-Cr- Mo and Ni in Fe-Cr-Ni ternary alloys. (elsevierpure.com)
  • The potential of InGaN alloys as TE materials for thermopower generation has been investigated. (k-state.edu)
  • A single peak of XRD -2 scans of the (002) plane in InGaN alloys confirms that there is no phase separation. (k-state.edu)
  • The hardness was found to increase even further when the as-cast alloy was subjected to a heat treatment at 900°C for two hours, regardless of whether water or calm air cooling was used after heating. (iom3.org)
  • According to the inventors, the results indicate that heat treatment leads to greater dark grey phase precipitation, which is believed to cause more crystalline network distortion and thus improved hardness and wear resistance. (iom3.org)
  • The patent therefore also claims protection for a heat-treated high-entropy alloy with the above-defined composition and achieving a hardness value equal to or greater than 730HV. (iom3.org)
  • The PS isaccompanied by an increase of micro-hardness of the bcc phase and a severeloss of toughness, leading to the deterioration of the mechanical properties.Therefore, the upper service temperature of DSSs in industrial applicationshas been limited to around 250° C.In the present work, the PS in DSSs was mainly investigated by smallangleneutron scattering (SANS). (kth.se)
  • For ribbon samples, a 25% increase in hardness has been achieved, which is provided with the separation of secondary-amorphous-phase glassy nanoparticles of about 7 nm with retention of plasticity on bending and compression. (phys.org)
  • The two-phase Ni3Al and Ni3V intermetallic alloy laser clad on substrate of SUS304 was evaluated by hardness measurement, scanning electron microscopy, electron probe microanalyzer and transmission electron microscopy observations, focusing on the effect of post annealing after laser irradiation. (elsevierpure.com)
  • The main goal of the study was to determine the influence of external pressure on the thickness of the Cu3Sn and Cu6Sn5 phase during certain periods of annealing time of the system. (edu.ua)
  • For this purpose, the values of the phase thickness at different stages of system annealing were measured. (edu.ua)
  • After the calculation, graphs were drawn that show the dependence of the phase thickness on the annealing time for both systems. (edu.ua)
  • Graphs of changes in phase thickness from annealing time showed a noticeable difference between the studied samples. (edu.ua)
  • The choice of the alloy composition and alloying system helped us bypass this problem: annealing at about 100 degrees below the glass -transition temperature allowed to achieve ductilization of bulk samples and hardening of tape samples without embrittlement," Professor Dmitry Luzgin, the research supervisor, explained. (phys.org)
  • At present, such components are commonly made of iron-based alloys like tool steels, manganese steels or white cast iron. (iom3.org)
  • A SOC-assisted Mott phase results, allowing an unexpected manifestation of correlation-driven physics in materials with extended 5 d -electron wave functions. (nature.com)
  • The resulting electronic phase diagram also reveals the surprising persistence of antiferromagnetic (AF) order deep into the metallic phase and suggests emergent itinerant magnetism at the interface between the AF-ordered spin-orbit Mott phase of Sr 3 Ir 2 O 7 and the nearly magnetic Fermi liquid electronic phase of Sr 3 Ru 2 O 7 . (nature.com)
  • We worked with them on zirconium equation of state studies at high pressures and temperatures, as well as phase diagram studies. (scienceblog.com)
  • Bulk nanostructured AlCoCrFeMnNi chemically complex alloy synthesized by laser-powder bed fusion. (mpie.de)
  • Bulk metallic glasses have found more and more uses in the past 15 years or so, and have begun replacing some conventional materials such as crystalline metals, metal alloys and high-tech ceramics. (scienceblog.com)
  • But all the bulk metallic glasses contain three or more component elements, which means they have lower thermal stability and phase separation at high temperatures, Zhao said. (scienceblog.com)
  • Funding of early work on pressure forming of bulk glass alloys came from the internal Laboratory Directed Research and Development program. (scienceblog.com)
  • For bulk samples, we've achieved an increase in tensile plasticity of up to 1.5% at room temperature by dividing a homogeneous amorphous phase into two. (phys.org)
  • Here we show that, upon hole-doping a candidate J eff =1/2 Mott insulator, carriers remain localized within a nanoscale phase-separated ground state. (nature.com)
  • Our combined transport, magnetization, neutron scattering and scanning-tunnelling spectroscopy (STS) studies show that the Mott insulating state of Sr 3 Ir 2 O 7 is remarkably robust as the in-plane doped holes remain largely localized within a nanoscale phase-separated ground state and only generate a metal-insulator transition (MIT) near the two-dimensional (2D) percolation threshold. (nature.com)
  • Early stage phase separation of AlCoCr 0.75 Cu 0.5 FeNi high-entropy powder at the nanoscale. (mpie.de)
  • However, these steel grades are sensitive to the so-called '475°Cembrittlement', because of a phase separation (PS) phenomenon in theferrite phase, which decomposes into Fe-rich ferrite (α) and Cr-rich ferrite(α'), when exposed to temperatures within the miscibility gap. (kth.se)
  • According to the scientists, it is the way the original amorphous matrix of the alloy decomposes that affects the resulting material's characteristics. (phys.org)
  • The disadvantage of these materials is that it is an equiatomic alloy and deviations of 1% in the composition modify the transition temperature by approximately 100 K. Some metals and ceramics present the effect bidirectionally, which means that at a certain temperature there is a shape and this can be changed by changing the temperature, but if the first temperature is recovered, also the first shape is recovered. (wikipedia.org)
  • EP3670684B1 claims protection for an as-cast high-entropy alloy with a chemical composition consisting of 5.0-20wt. (iom3.org)
  • Towards the chemically specific structure of amorphous materials: anomalous X-ray scattering from a molybdenum-germanium alloy 19th International Conference on Amorphous and Microcrystalline Semiconductors (ICAMS 19) Ishii, H., Brennan, S., Bienenstock, A. ELSEVIER SCIENCE BV. (stanford.edu)
  • This study announces the anomalous phase separation in CoNiP alloy electroplating. (edu.sa)
  • Depending on the dislocation mobility and observation time, the phase separation may be accelerated, decelerated, or unaffected by mobile dislocations. (princeton.edu)
  • alloy, nucleation, growth, and coarsening of the γ′-precipitates is observed during the isothermal transformation at 873 K. Precipitate coalescence is present, and its influence on the power-law dependencies of the number density and mean radius during coarsening is discussed and compared to classical models. (northwestern.edu)
  • Our results demonstrate a surprising parallel between doped 5 d - and 3 d -electron Mott systems and suggest either through the near-degeneracy of nearby electronic phases or direct carrier localization that U is essential to the carrier response of this doped spin-orbit Mott insulator. (nature.com)
  • Doping this spin-orbit Mott phase has since generated predictions of stabilizing states analogous to those found in doped strongly correlated 3 d -electron Mott insulators such as the high-temperature cuprate superconductors 4 . (nature.com)
  • With an ideal band gap, absence of O$_{S}$induced gap states, high optical absorptivity, and low electron effective mass, FeS$_{2-x}$O$_{x}$ alloys are promising for the development of pyrite-based heterojunction solar cells that feature large photovoltages and high device efficiencies. (aps.org)
  • First Best Paper Award of the IEEE Journal of Quantum Electronics for the paper "Gain and threshold characteristics of long wavelength lasers based on InAs/GaAs quantum dots formed by activated alloy phase separation", IEEE J. Quantum Electron. (ioffe.ru)
  • Using kinetic Monte Carlo simulations to study phase separation in alloys. (mpg.de)
  • CHARACTERIZATION OF PHASE-SEPARATION IN AMORPHOUS FILMS USING MODERN SMALL-ANGLE SCATTERING METHODS 6th International Conference on the Structure of Non-Crystalline Materials (NCM 6) Regan, M. J., Bienenstock, A. ELSEVIER SCIENCE BV. (stanford.edu)
  • In June 2023, however, a European patent EP3670684B1 on High wear resistant high entropy alloy and preparation there of was granted to Casa Maristas Azterlan, a private metallurgy research centre based in the Basque region of Spain. (iom3.org)
  • For the wear-resistant requirements of special industries, replaceable hard alloy wear-resistant pieces are added to the spiral blades. (zkcentrifuge.com)
  • 2012). Model of phase separation and of morphology evolution in two-phase alloy. (edu.ua)
  • In this study, we systematically review, on the basis of experimental results, the kinetic process of the L 12 →L 12 +D 022 phase separation of Ni3 (Al,V)1-δ alloys, which is dominated by long-range atomic diffusion in the diffusion field with the L 12 ordered structure. (elsevierpure.com)
  • Because during the creation of a soldered joint, reactive diffusion occurs between copper and liquid tin, as a result of which two phases are formed at their contact. (edu.ua)
  • Tatarchuk E. V. (2015) Influence of the size of copper grains on the growth rate of a layer of intermediate phases in a Cu-Sn diffusion pair. (edu.ua)
  • O$_{S}$ formation is exothermic, and the oxygen atoms tend to avoid O-O dimerization, which favors the structural stability of homogeneous FeS$_{2-x}$O$_{x}$ alloys and frustrates phase separation into FeS$_{2}$ and iron oxides. (aps.org)
  • Phase field models are a widely used approach to describe physical processes that are characterized by thin interfacial regions between large almost homogeneous domains. (fu-berlin.de)
  • These, combined with minor amounts of non-metallic phases and sulfide minerals, form the three basic subdivisions of irons. (planets.org)
  • Traditional metal alloys typically contain only one or two base elemental components (e.g. iron in the case of steel, or copper and zinc in the case of brass), to which alloying elements may be added in minor amounts. (iom3.org)
  • The involved chemistry relies on basic knowledge of element separation involving radiochemical techniques such as liquid-liquid extraction, ion chromatography, pyrochemistry or precipitation. (psi.ch)
  • They behave elastically like polymers but are much stronger than metal alloys, characteristics that make them ideal for structural engineering materials and many other applications. (scienceblog.com)
  • Directional solidification of aqueous solutions and slurries in a temperature gradient is widely used to produce cellular materials through a phase separation of solutes or suspended particles between growing ice lamellae. (northeastern.edu)
  • The three-phase centrifuge's unique mechanism enables the solid-liquid-liquid phase separation and the discharge of the light and heavy liquid and solid phase separately. (zkcentrifuge.com)
  • A quantitative analysis method based onthe SANS data was proposed to evaluate both the wavelength and amplitudeof PS in Fe-Cr based alloys, e.g. (kth.se)
  • 0.1 phase separation results in a multimodal distribution of the peak wavelength, leading to additional low-energy peaks in CL overview spectra. (elsevierpure.com)
  • For the times investigated (0.0833 to 1024 h), these alloys exhibit a high number density (1022-1024 m-3) of spheroidal γ′-precipitates, 0.45-30 nm in radius. (northwestern.edu)
  • A percolative metal-insulator transition occurs with interplay between localized and itinerant regions, stabilizing an antiferromagnetic metallic phase beyond the critical region. (nature.com)
  • phase separation occurs during the initial quench leading to a highly interconnected γ′-nanostructure. (northwestern.edu)
  • In this letter, we present a very convenient and efficient technique of direct replication of biological structures via a two-step phase-separation micromolding process (PSμM). (acs.org)
  • Interest in many strongly spin-orbit-coupled 5d -transition metal oxide insulators stems from mapping their electronic structures to a J eff =1/2 Mott phase. (nature.com)
  • While this process has analogies to the directional solidification of metallurgical alloys, it forms very different hierarchical structures. (northeastern.edu)
  • No distinct separation between the metal and silicate phases is readily apparent as it is with the Pallasites. (planets.org)
  • A fundamental property of these models is, that the transition and separation of phases is driven by a double-well potential with distinct minima for the different phases. (fu-berlin.de)
  • The unidirectional shape-shape-memory effect was first observed by Chand and Read in 1951 in a Gold-Cadmium alloy and in 1963 Buehler described this effect for nitinol, which is an equiatomic Nickel-Titanium alloy. (wikipedia.org)
  • Meteorites consist of varying amounts of nickel-iron alloys, silicates, sulfides, and several other minor phases. (planets.org)
  • Iron meteorites are characterized by the presence of two nickel-iron alloy metals: kamacite and taenite. (planets.org)
  • Stony-irons consist of almost equal amounts of nickel-iron alloy and silicate minerals. (planets.org)
  • Melting and Casting of Raney Nickel Alloy. (cdc.gov)
  • This effect in metals and ceramics is based on a change in the crystal structure, called martensitic phase transition. (wikipedia.org)
  • Important application areas of phase field models are transition processes of the state of matter and the separation of alloys. (fu-berlin.de)
  • We've broken with the conventional wisdom that BMGs can only be produced from multicomponent alloys and only with the conventional approach of melting and fast quench," he explained. (scienceblog.com)
  • The three-phase centrifuge separates solid-liquid three-phase mixtures by rotating at high speed and producing a centrifugal force thousands of times larger than the gravity force. (zkcentrifuge.com)
  • The solid phase entering the centrifuge is precipitated by centrifugal force, and the two liquid phases are also stratified. (zkcentrifuge.com)
  • 400 nm/hr) to achieve high quality and single phase InxGa1−xN alloys in this miscibility gap region. (k-state.edu)
  • Resistivity as low as 0.4 -cm with a free hole concentration as high as 5x1018 cm-3 was measured in Mg-doped In0.22Ga0.78N. PL intensity decreased ~3 orders in magnitude when x increased from 0 to 0.22 in Mg-doped InxGa1-xN alloys. (k-state.edu)
  • All wear-prone areas of ZK centrifuges (separation liquid outlet, solids discharge output, screw conveyor and solids discharge section) are made of abrasion resistant material, and the rotating parts are made of high-strength centrifugally cast stainless steel. (zkcentrifuge.com)
  • Crushed barite is first converted to barium sulfide by high-temperature, solid-phase reduction with a carbonaceous reducing agent. (cdc.gov)
  • Interplay of Chemistry and Faceting at Grain Boundaries in a Model Al Alloy. (mpie.de)
  • Grain boundary phases in pure and alloyed Cu: Insights from advanced STEM. (mpie.de)
  • Ag-rich ) phase formation and consequently the matrix β ( Cu-rich ) depletion. (scirp.org)
  • In addition, the effect of external pressure on the process of growth or inhibition of the phase and the formation of pores was studied. (edu.ua)
  • Mesosiderites, on the other hand, consist mainly of plagioclase and pyroxene silicates in the form of heterogeneous aggregates intermixed with the metal alloy. (planets.org)
  • alloys are studied utilizing three-dimensional atom-probe microscopy. (northwestern.edu)