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Topological Instability as a Criterion for Design and Selection of Easy Glass-Former Compositions in Cu-Zr Based Systems

2007; Volume: 48; Issue: 7 Linguagem: Inglês

10.2320/matertrans.mj200745

1347-5320

Cláudio Shyinti Kiminami, R. D. S aacute Lisboa, Marcelo Falção de Oliveira, Claudemiro Bolfarini, Walter José Botta Filho,

Glass properties and applications

In the present work we propose a new approach for predicting the best glass-former composition(s) in multi-component metallic glasses. By applying the λ criterion, a topological instability criterion proposed to predict the crystallisation behaviour of Al-based systems, we show that it is also successfully possible to reproduce compositional ranges where binary and ternary bulk metallic glasses (BMGs) have recently been obtained. Our results indicate that the good glass-former composition(s) lie(s) within fields of mutual and simultaneous topological instability of all the crystalline phases competing with glassy phase.