Hits:

Indexed by:期刊论文

Date of Publication:2009-12-01

Journal:Frontier Symposium of China Postdoctoral on Materials Science

Included Journals:SCIE、EI、CPCI-S、ISTIC、CSCD、Scopus

Volume:19

Issue:6

Page Number:1618-1622

ISSN No.:1003-6326

Key Words:Cu58.1Zr35.9Al6 alloy; different scanning calorimetry (DSC); crystallization kinetics

Abstract:The crystallization kinetics of the bulk amorphous Cu58.1Zr35.9Al6 alloy was examined by differential scanning calorimetry under continuous heating and isothermal annealing. During continuous heating, the activation energy of crystallization was determined to be 383 kJ/mol by Kissinger method. However, on the isothermal annealing, the activation energy was determined to be 459.2 kJ/mol by the Arrhenius method, which was much larger than that obtained from the Kissinger method. The different temperatures at which crystallization occurs are responsible for the discrepancy in the activation energy. The average Avrami exponent of about 3.5 implies that the crystallization process of the bulk amorphous Cu58.1Zr35.9Al6 alloy is diffusion-controlled with a nucleation rate decreasing with time.