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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 5    October 2008

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Effects of 5%Ni addition on thermal stability and crystallization behavior of Mg65Cu25Tb10 bulk metallic glass
QIN Wei-dong(秦卫东)1, LI Jin-shan(李金山)1, KOU Hong-chao(寇宏超)1,
GU Xiao-feng(顾晓峰)2, XUE Xiang-yi(薛祥义)1, ZHOU Lian(周 廉)1

1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University,Xi’an 710072, China;
2. School of Information Technology and Engineering, Jiangnan University, Wuxi 214122, China

Abstract:The effects of 5%Ni addition on the glass forming ability, thermal stability and crystallization behavior of Mg65Cu25Tb10 bulk metallic glass were investigated using X-ray diffractometry, differential scanning calorimetry and transmission electron microscopy. The small amount of Ni addition reduces the glass forming ability and thermal stability due to a significant decrease in the crystallization activation energy. Analyses of crystallization kinetics give evidence to the existence of quenched-in nuclei in amorphous Mg65Cu20Ni5Tb10. Final crystallization products are basically same for Mg65Cu25Tb10 and Mg65Cu20Ni5Tb10.

 

Key words: bulk metallic glass; thermal stability; crystallization behavior; quenched-in nuclei

ISSN 1672-7029
CN 43-1423/U

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