Results 271 to 280 of about 8,803 (312)
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Nanostructured WCCo alloy prepared by mechanical alloying
Journal of Alloys and Compounds, 1996Abstract Nanocrystalline cemented carbide powder of WCCo was directly synthesized by mechanical alloying. The structure evolution of the powders was monitored by X-ray diffraction, scanning electron microscope and thermal analysis. Results show that the formation of the compounds is controlled by an inter-diffusion reaction between elements. Powders
M.A. Xueming, J.I. Gang
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Nanostructured Bearing Alloy Studies.
1994Abstract : Work prior to this reporting period focused on achieving a more inert atmosphere for handling and consolidation of the nano-scaled steel powders. As a result, oxygen content in the nano steel powder compacts has been decreased significantly. However, even the decreased level (3% to 5%) is still too high. Further, high carbon levels (6% to 10%
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Nanostructuring of Metals, Alloys, and Composites
2020Nanostructured metal and alloy development represented a broad frontier in the materials science research in the last two decades. The fundamental research is based on the general assumption that material properties and deformation mechanisms strongly vary as the grain size is reduced from microcrystalline regime (>1 μm) to ultrafine grain regime (1 μm–
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Nanostructure characterization of mechanical alloyed and consolidated iron alloys
Materials Science and Engineering: A, 1997High-energy ball milling (which is readily adoptable to commercial application) was used to develop sufficient quantities of nanostructured material to produce compacts capable of being measured for macroscopic properties. Characterization of the ball-milled powders show that grain boundary properties play a significant role in the overall properties ...
J. Rawers, R. Krabbe, N. Duttlinger
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Atomic mobility in nanostructured liquid Ga–In alloy
Journal of Physics: Condensed Matter, 2010Nuclear spin relaxation and the Knight shift for (71)Ga, (69)Ga, and (115)In isotopes were studied by nuclear magnetic resonance (NMR) in liquid gallium-indium alloy confined to porous glass and alloy surface film and were compared with the bulk counterparts. Drastic spin relaxation acceleration under nanoconfinement was observed for the three isotopes.
E V, Charnaya +3 more
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Stability of nanostructured metals and alloys
Scripta Materialia, 2004Abstract The processes controlling the microstructural evolution of very fine grain sized metallic alloys––mostly developed by plastic deformation––are briefly reviewed. Recent work on understanding the mechanisms that inhibit localized grain boundary motion by Zener and solute drag and applying this knowledge to model systems is outlined.
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Microstructure and hardness of a nanostructured Fe-40Al at% alloy
Nanostructured Materials, 1999Abstract Microstructural changes induced by ball milling under different conditions and posterior annealing in Fe-40Al at% B2 alloys have been studied. High speed milling results in more disordered samples and milling media contamination, which affects the thermal reordering.
X. Amils +5 more
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Biological Routes to Metal Alloy Ferromagnetic Nanostructures
Nano Letters, 2004Magnetic nanoparticles have potential applications in high-density memory devices, but their complicated synthesis often requires high temperatures, expensive reagents, and postsynthesis annealing to achieve the desired magnetic properties. Current synthetic methods for magnetic nanoparticles often require post-synthetic modifications, suggesting that ...
Reiss, Brian D. +5 more
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Development of nanostructured Mg2Ni alloys for hydrogen storage applications
International Journal of Hydrogen Energy, 2011Abstract The Mechanically Activated Self-propagating High temperature Synthesis (MASHS) has been employed to obtain nanostructured Mg2Ni alloys. MASHS process has been further improved by controlling the electrical parameter measurements during the combustion reaction under the thermal explosion mode. The samples were hydrogenated at 20 bar and 300 °
ATIAS ADRIAN, ISABEL CRISTINA +4 more
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On the evolution of a deformation induced nanostructure in a Ni3Al alloy
Acta Materialia, 2005The evolution of a nanocrystalline structure of a polycrystalline L1 2 ordered Ni3Al alloy was investigated by transmission electron microscopy methods after severe plastic deformation by high pressure torsion. As a precursor of the nanocrystalline structure, blocks and bands are formed containing misoriented fragments in the 100 nm range separated by ...
Rentenberger, Christian +1 more
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