Journal of Materials Research
November 2005— Volume 20, Number 11

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Refractory Mo-Si-based glassy alloy designed for ultrahigh strength and thermal stability X.Q. Zhang and W. Wang Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China E. Ma Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218 J. Xu Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

Mechanically alloyed Mo₄₄Si₂₆Ta₅Zr₅Fe₃Co₁₂Y₅ multicomponent glassy alloy exhibits an exceptionally high glass transition temperature of 1202 K and a crystallization temperature of 1324 K, as well as an ultrahigh hardness of 18 GPa. This example is used to demonstrate metallic glasses that possess extraordinary thermal stability and ultrahigh strength and, at the same time, a wide supercooled liquid region (122 K) that is needed for processing into bulk forms through powder metallurgy routes.

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