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APL Materials  2013 

Temperature dependent mechanical properties of Mo–Si–B compounds via ab initio molecular dynamics

DOI: 10.1063/1.4809539

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Abstract:

A new method was proposed to obtain high temperature mechanical properties with a combination of ab initio molecular dynamics and stress-strain analyses. It was applied to compounds in the Mo–Si–B ternary system, namely, T1 (Mo5Si3) and T2 (Mo5SiB2) phases. The calculated coefficient of thermal expansion, thermal expansion anisotropy, and elastic constants agree well with those from the available experiments. The method enables us to theoretically access these properties up to 2000 K.

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