An alloy is a substance composed of two or more chemical elements, at least one of which is a metal, forming a single or multiphase metallic material with modified physical, chemical, and mechanical properties relative to its constituent elements. At the atomic scale, alloys may exhibit substitutional or interstitial solid solutions, ordered phases, or complex microstructures generated by phase transformations and thermal or mechanical processing. Alloy design and characterization focus on composition, phase equilibria, microstructural features (such as grains, precipitates, and defects), and resulting properties including hardness, strength, ductility, corrosion resistance, electrical conductivity, and thermal stability, which are tailored for specific technological and industrial applications.
High-temperature shock (HTS) is an emerging synthesis method with kinetics-dominated non-equilibrium characteristics, which can achieve an ultrafast heating/cooling rate of ~105 K/s and a peak temperature larger than ~3000 ...
Nanomaterials
May 18, 2023
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Nanoparticles have been used to develop high-strength materials for structural applications. But these nanoparticles are often thermally unstable, leading to rapid coarsening in a high-temperature environment.
Nanophysics
Nov 15, 2022
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High entropy alloys or HEAs consist of five or more different metallic elements and are an extremely interesting class of materials with a great diversity of potential applications. Since the macroscopic properties of HEAs ...
Nanophysics
Oct 20, 2022
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101
Researchers have devised a method for combining high-cost platinum and a low-cost rare earth element, lanthanum, as an alloy to serve as a catalyst in the next generation of fuel cells that will improve their performance ...
Nanomaterials
Oct 11, 2022
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134
Some alloys are in the liquid state at or near room temperature. These alloys are usually composed of gallium and indium (elements used in low energy lamps), tin and bismuth (materials used in constructions). The ratio and ...
Nanomaterials
Sep 22, 2021
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131
Scientists at the Department of Energy's Oak Ridge National Laboratory and the University of Tennessee, Knoxville, have found a way to simultaneously increase the strength and ductility of an alloy by introducing tiny precipitates ...
Nanophysics
Jul 8, 2021
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115
