GLASS FORMING ABILITY AND NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF  METALLIC GLASS

Xiao-Song Li (P. R. China), Wei-Ke An (P. R. China), An-Hui Cai (P. R. China), Jiang-Hong Li (P. R. China), Yun Luo (P. R. China) and Tie-Lin Li (P. R. China)

Received March 3, 2009

Abstract

The glass forming ability, thermal stability and non-isothermal crystallization kinetics of  glass forming alloy are investigated. Its maximum glass forming dimension is up to 6.5mm and its critical cooling rate is less than  It manifests two crystallization procedures and the second crystallization peak is more sensitive to heating rate than the first crystallization peak. The glass transition and crystallization both have remarkable kinetics effects. The apparent activation energies for glass transition temperature, onset crystallization temperature, the first crystallization peak temperature and second crystallization peak temperature are 191.10, 332.83, 268.30 and  respectively.

Keywords and phrases: metallic glass, glass forming ability, thermal stability, non-isothermal crystallization.