Properties of high-density, well-ordered, and high-energy metallic glass phase designed by pressurized quenching

Narumasa Miyazaki, Yu-Chieh Lo, Masato Wakeda, Shigenobu Ogata

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6 Scopus citations

Abstract

We applied gigapascal-level compressive hydrostatic pressure to the melt-quenching process of metallic glass to obtain a unique high-pressure glass state with high density that is well-ordered yet has high energy. This state contradicts the common understanding that high-density, well-ordered metallic glass states have low energy. Through molecular dynamics simulations, we found that the high-pressure glass state of the metallic glass Zr50Cu40Al10 has a rich anti-free volume and that its relaxation is dominated by the annihilation of full icosahedra and the rich anti-free volume. The aging rate of the high-pressure metallic glass state (energy reduction rate) is almost the same as that of typical high-energy metallic glass, suggesting that it has a lifetime similar to that of a typical high-energy metallic glass that has been experimentally realized and reported previously [Wakeda et al., Sci. Rep. 5, 10545 (2015)]. Thus, the high-pressure phase can be realized even under the experimental cooling rate, suggesting its suitability for practical applications.

Original languageEnglish
Article number091906
JournalApplied Physics Letters
Volume109
Issue number9
DOIs
StatePublished - 29 Aug 2016

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