Crystallization kinetics of an Au-based metallic glass upon ultrafast heating and cooling

Bai, F. and Yao, J. and Wang, Y. and Pan, J. and Li, Y. 2017. Crystallization kinetics of an Au-based metallic glass upon ultrafast heating and cooling. Scripta Materialia. 132: pp. 58-62.

Source Title

Scripta Materialia

DOI

10.1016/j.scriptamat.2017.02.001

ISSN

1359-6462

School

Fuels and Energy Technology Institute

URI

http://hdl.handle.net/20.500.11937/72945

Collection

Curtin Research Publications

Abstract

© 2017 Acta Materialia Inc. The crystallization behavior of Au50Cu25.5Ag7.5Si17metallic glass during continuous heating/cooling and isothermal treatment is investigated by ultrafast calorimetry. The relationship between the transformation and the time/temperature scales of the alloy is established experimentally in a wide temperature range from glass transition temperature to the melting point. Temperature-dependent viscosity in the expanded supercooled liquid region is derived from the thermodynamic and kinetic analysis of the crystallization behavior of the metallic glass. The nucleation rate and growth velocity for crystallization of the supercooled liquid are analyzed by applying classical nucleation theory and diffusion-controlled growth theory.