Micromechanism of Crystallization in Multicomponent Metallic Glass

J Mater Sci Technol ›› 1996, Vol. 12 ›› Issue (6): 401-408.

Micromechanism of Crystallization in Multicomponent Metallic Glass

Jianmin LP; Mingxiu;QUAN and Zbuangqi HU (National Key Lab. of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China)(To whom correspondence should be addressed)

Received:1996-11-28 Revised:1996-11-28 Online:1996-11-28 Published:2009-10-10

Abstract

Abstract: A micromechanism in an atomic level of crystallization of transition metal-metalloid TM80M20 metallic glass is thermodynamically proposed by taking Bernal polyhedra as the starting structure of metaIlic glass. It is composed of two competitively processes: (i) densification process of atom cluster leads to the formation of the precursor in amorphous matrix, (ii) the growth of atom cluster leads to the decreasing packing density. The preferential precipitation sequence of metastable phase is bcc, bct. cpc (close-packed crystal, hcp or fcc structure). A metastable phase decomposition (Fe,Mo)23B6 (fcc)-Fe2B highly strained bct phase was observed during crystallization of (Fe0.99Mo0.01)78Si9B13 metallic glass, which is related to the occurrence of nanocrystalline.

Jianmin LP; Mingxiu;QUAN and Zbuangqi HU (National Key Lab. of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China)(To whom correspondence should be addressed). Micromechanism of Crystallization in Multicomponent Metallic Glass[J]. J Mater Sci Technol, 1996, 12(6): 401-408.

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