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Kinetic study on the non-isothermal crystallization of Gd53Al24Co20Zr3 bulk metallic glass
Alternative TitleKinetic study on the non-isothermal crystallization of Gd 53Al 24Co 20Zr 3 bulk metallic glass
Zhuang Yanxin1; Xing Pengfei2; Duan Tongfei1; Shi Hongyu1; He Jicheng1
2011
Source PublicationJOURNAL OF RARE EARTHS
ISSN1002-0721
Volume29Issue:8Pages:793-797
AbstractGd-based bulk metallic glass has drawn strong attention because of its large magnetic entropy changes. Thermal stability of metallic glass is a very important issue for its application. In the paper, crystallization behavior of Gd53Al24Co20Zr3 bulk metallic glass was investigated using non-isothermal differential scanning calorimetric (DSC) technique. Attention was given to the analytic details. The crystallized volume fractions as a function of temperature were derived from the DSC signals, where heat capacity change between amorphous phase and crystalline phase was considered. The local activation energies at different crystallized volume fraction were estimated using Doyle-Ozawa and Agrawal methods. The results suggested that the Doyle-Ozawa equation was appropriate to get local activation energy due to its simplicity and accuracy. The local activation energy depended on the crystallized volume fraction. Function reflecting crystallization mechanism was also deduced. The crystallization mechanism of the Gd-based bulk metallic glass was discussed.
Other AbstractGd-based bulk metallic glass has drawn strong attention because of its large magnetic entropy changes.Thermal stability of metallic glass is a very important issue for its application.In the paper,crystallization behavior of Gd53Al24Co20Zr3 bulk metallic glass was investigated using non-isothermal differential scanning calorimetric(DSC)technique.Attention was given to the analytic details.The crystallized volume fractions as a function of temperature were derived from the DSC signals,where heat capacity change between amorphous phase and crystalline phase was considered.The local activation energies at different crystallized volume fraction were estimated using Doyle-Ozawa and Agrawal methods.The results suggested that the Doyle-Ozawa equation was appropriate to get local activation energy due to its simplicity and accuracy.The local activation energy depended on the crystallized volume fraction.Function reflecting crystallization mechanism was also deduced.The crystallization mechanism of the Gd-based bulk metallic glass was discussed.
KeywordGd-based metallic glass crystallization non-isothermal activation energy mechanism rare earths
Indexed ByCSCD
Language英语
Funding Project[Fundamental Research Funds for the Central University]
CSCD IDCSCD:4331022
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/157885
Collection中国科学院金属研究所
Affiliation1.上海市地震局
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhuang Yanxin,Xing Pengfei,Duan Tongfei,et al. Kinetic study on the non-isothermal crystallization of Gd53Al24Co20Zr3 bulk metallic glass[J]. JOURNAL OF RARE EARTHS,2011,29(8):793-797.
APA Zhuang Yanxin,Xing Pengfei,Duan Tongfei,Shi Hongyu,&He Jicheng.(2011).Kinetic study on the non-isothermal crystallization of Gd53Al24Co20Zr3 bulk metallic glass.JOURNAL OF RARE EARTHS,29(8),793-797.
MLA Zhuang Yanxin,et al."Kinetic study on the non-isothermal crystallization of Gd53Al24Co20Zr3 bulk metallic glass".JOURNAL OF RARE EARTHS 29.8(2011):793-797.
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