Crystallization kinetics of Zr41Ti14 Cu12.5 Ni10 Be22.5 bulk metallic glass

The crystallization kinetics of Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 bulk metallic glass has been studied by using DSC and XRD. The results show that two exothermal peaks are observed when the alloy is heated to 500?℃, one peak results dominantly from the formation of Ti 2Ni ( α phase transition), the other peak is mainly due to the formation of Zr 2Cu ( β phase transition). At the beginning of the crystallization, the activation energy of the α phase is smaller, and it increases with increasing crystallized fraction ( x c). When x c increases to 90%, the crystallization activation energy shows the largest value (220?kJ/mol). The crystallization activation energy of the β phase remains about 227?kJ/mol, as it’s crystallized fraction is below 60%, and then it increases with increasing crystallized fraction, and shows the largest activation energy of 257?kJ/mol, as the x c is 65%.