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Acta Metall Sin  2004, Vol. 40 Issue (12): 1285-1289     DOI:
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CRYSTALLIZATION KINETICS OF THE Ni-BASED BULK METALLIC GLASS
QIN Fengxiang; ZHANG Haifeng; CHEN Peng; LI Hong; HU Zhuangqi
Shenyang National Laboratory for Materials Science; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016
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QIN Fengxiang; ZHANG Haifeng; CHEN Peng; LI Hong; HU Zhuangqi. CRYSTALLIZATION KINETICS OF THE Ni-BASED BULK METALLIC GLASS. Acta Metall Sin, 2004, 40(12): 1285-1289 .

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Abstract  The crystallization kinetics of the Ni45i23Zr15Si5Pd12 alloy has been investigated by DSC and XRD. The process of crystallization is multi-stage proceeding. The isothermal activation energy obtained from Arrhenius equation increases with the process of crystallization. Based on the JMA equation, the average Avrami exponent for the main crystallization process is larger than 3.0, indicating the crystallization to be a three-dimensional nucleation and growth. The large atomic size difference and negative heats of mixing increase the thermal stability of the Ni-based amorphous alloy.
Key words:  Ni-based bulk metallic glass      crystallization kinetics      
Received:  26 November 2003     
ZTFLH:  TG139.8  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2004/V40/I12/1285

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