镍基块状非晶合金的晶化动力学行为

金属学报

2004, Vol. 40

Issue (12): 1285-1289

论文

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镍基块状非晶合金的晶化动力学行为

秦凤香;张海峰;陈鹏;李宏;胡壮麒

中国科学院金属研究所沈阳材料科学国家(联合)实验室; 沈阳 110016

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

引用本文:

秦凤香; 张海峰; 陈鹏; 李宏; 胡壮麒 . 镍基块状非晶合金的晶化动力学行为[J]. 金属学报, 2004, 40(12): 1285-1289 .
, , , , . CRYSTALLIZATION KINETICS OF THE Ni-BASED BULK METALLIC GLASS[J]. Acta Metall Sin, 2004, 40(12): 1285-1289 .

全文: PDF(194 KB)

摘要: 利用铜模铸造方法制备了Ni45Ti23Zr15Si5Pd12块状非晶合金, 采用扫描差热分析(DSC)和X射线衍射(XRD)对该块状非晶合金的晶化动力学行为进行了研究. 结果表明: Ni45Ti23Zr15Si5Pd12 块状非晶样品的晶化过程为多阶段晶化, 主要晶化过程的Avrami指数大于3.0, 为三维形核长大过程; 随着晶化体积分数的增加, 剩余非晶的晶化激活能增大, 合金热稳定性增加; 原子尺寸差异以及各原子间大的负混合焓是合金具有高的热稳定性的主要原因.

关键词 ：镍基块状非晶合金, 晶化动力学

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

收稿日期: 2003-11-26

ZTFLH:

TG139.8

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