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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.44  No.4 (2003)  >  pp.709-712

MATERIALS TRANSACTIONS
<<Previous article Vol.44  No.4 (2003)   pp.709 - 712 Next article>>

Study of the Crystallization Kinetics of Zr60Al15Ni25 Bulk Glassy alloy by Differential Scanning Calorimetry

Zhijie Yan1)2), Jinfu Li1), Shunrong He1), Honghua Wang1) and Yaohe Zhou1)
1) State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University
2) Taiyuan Heavy Machinery Institute


This paper investigates the crystallization kinetics of Zr60Al15Ni25 bulk glassy alloy under isothermal annealing by differential scanning calorimetry (DSC). The results show that the incubation time is very small even at low annealing temperature (743 K) and increases slightly with the annealing temperature decreasing, which suggests a growth-controlled crystallization process. However, the exothermic peak width, reflecting the time for the actual crystallization process, increases greatly when annealing temperature decreases. The Avrami exponents indicate that the crystallization mechanism changes at different annealing temperatures. The change of the crystallization mechanism is attributed to the great difference of the mobility ability of atoms at different temperatures.


Keyword:
crystallization kinetics, Zr60Al15Ni25 bulk glassy alloy, differential scanning calorimetry

Received: November 11, 2002
Accepted: February 27, 2003 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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