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NiTiZrAICuSi块体非晶合金等温晶化动力学

The Isothermal Crystallization Kinetics of NiTiZrAICuSi Bulk Amorphous Alloy
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摘要 利用铜型铸造法制备了Ni42Ti20Zr21．5A18Cu5Si3．5块体非晶合金，采用示差扫描量热计（DSC）对Ni42Ti20Zr21．5A18Cu5Si3．5块体非晶合金的等温晶化动力学进行了研究。利用JMA方程对等温晶化过程进行了分析，结果表明该合金的等温晶化过程始于一维界面控制的形核及长大，等温晶化的主要阶段为Avrami指数大于3．0的三雏形核和长大过程。 Ni42Ti20Zr21.5A18CuSSi3.5 bulk amorphous alloy was prepared by using copper mould casting. Isothermal crystallization kinetics of Ni42Ti20Zr21.5A18CuSSi3.5 alloy was investigated by using differential scanning calorimetry （DSC）. JMA equation was employed for analyzing the crystallization data. It is found that the first stage of crystallization process is governed by one-dimensional growth and nucleation. The Avrami exponent for the main crystallization process is larger than 3.0, indicating the main crystallization is controlled by a three-dimensional nucleation and growth.
作者 魏先顺 梁维中 王海波
机构地区 哈尔滨理工大学材料科学与工程学院
出处 《铸造工程》 2006年第4期27-29,共3页 Foundry Engineering
关键词 镍基非晶合金 等温晶化动力学 形核 长大 Ni-based amorphous alloy Isothermal crystall ization kinetics Nucleation Growth
分类号 TG139.8 [一般工业技术—材料科学与工程]
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参考文献11

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共引文献6

铸造工程
2006年 第4期

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