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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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Cite this article:
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.
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Received: 26 November 2003
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