Crystallization Kinetics of Hf18Be18Ti18Zr18Cu7.5Ni12.5 Bulk Amorphoous Alloy
Author of the article:LI Mengmeng;LI Bing;FAN Xinhui;YANG Ke;LI Yanhong;ZHAO Jinbei
Author's Workplace：College of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China
Key Words：bulk amorphous alloy crystallization kinetics crystallization volume fraction activation energy
Abstract：The Hf18Be18Ti18Zr18Cu7.5Ni12.5 bulk amorphous alloy was prepared by the copper mold suction casting method The crystallization kinetics of hafnium-based amorphous alloys was studied.The results show that the activation energy of hafnium-based amorphous alloy is calculated by Kissinger’s and Ozawa’s methods under the condition of continuous heating.According to the calculation of these two equations,similar values are observed,and Ex is less than Ep,indicating that the activation energy required for nucleation of hafnium amorphous alloy is less than that for crystal growth.Under the isothermal condition,the activation energy decreases with the increase of crystallization volume fraction.This phenomenon is caused by the nucleation and growth of crystals.
