Influence of Heating Rates on Crystallization Behavior of Zr65Ni10Cu17.5Al7.5 Bulk Amorphous Alloy

Yang Gaolin1; Lin Xin1; Liu Weiwei1; Huang Weidong1; Liu Lin2

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Influence of Heating Rates on Crystallization Behavior of Zr₆₅Ni₁₀Cu_17.5Al_7.5 Bulk Amorphous Alloy
Vol. 29, Issue 3, Pages: 203-206(2009)
Published： 2009 ，
DOI：

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[1]杨高林,林鑫,刘伟伟,黄卫东,柳林.升温速度对Zr_(65)Ni_(10)Cu_(17.5)Al_(7.5)块体非晶合金晶化的影响[J].特种铸造及有色合金,2009,29(03):203-206+189-190.

Yang Gaolin1, Lin Xin1, Liu Weiwei1, et al. Influence of Heating Rates on Crystallization Behavior of Zr₆₅Ni₁₀Cu_17.5Al_7.5 Bulk Amorphous Alloy. [J]. Special Casting & Nonferrous Alloys 29(3):203-206(2009)
[1]杨高林,林鑫,刘伟伟,黄卫东,柳林.升温速度对Zr_(65)Ni_(10)Cu_(17.5)Al_(7.5)块体非晶合金晶化的影响[J].特种铸造及有色合金,2009,29(03):203-206+189-190. DOI：

Yang Gaolin1, Lin Xin1, Liu Weiwei1, et al. Influence of Heating Rates on Crystallization Behavior of Zr₆₅Ni₁₀Cu_17.5Al_7.5 Bulk Amorphous Alloy. [J]. Special Casting & Nonferrous Alloys 29(3):203-206(2009) DOI：

摘要

采用差示扫描量热法（DSC）研究了不同加热速率下Zr65Ni10Cu17.5Al7.5块体非晶合金从玻璃转变到熔融温度区间中的晶化过程。结果显示

在升温过程中该非晶合金的晶化过程存在3个阶段

每个阶段对应的晶化起始温度和晶化峰值温度都随升温速度的升高而向高温区域移动

并用JMA理论和热分析动力学进行分析。通过淬火并结合XRD分析

发现随着温度升高

对应这3个阶段的合金相是由准晶相经四方晶系的Al2Zr3和NiZr2混合相向四方晶系的CuZr2、立方晶系的NiZr2以及斜方晶系的Al3Zr2的混合相进行晶化转变

并且每个阶段的晶化产物和晶粒尺寸随升温速度的提高变化不大。并发现高升温速度下第二阶段的晶化对第一阶段有抑制作用。

Abstract

Crystallization behavior of Zr65Ni10Cu17.5Al7.5 bulk amorphous alloy in the temperature range of glass transition to melt point was examined by DSC（differential scanning calorimeter）at different heating rates.The results reveal that there exist three stages in the whole crystallization process.Glass transition temperature

crystallization temperature and peak temperature corresponding to each stage move towards higher temperature with the increase of heating rates

which was described by Johnson-Mehl-Avrami（JMA）theory and thermal kinetics.The microstructure of the quenched bulk amorphous alloy was analyzed by XRD（X-ray diffraction）.It is found that with increasing in heating temperature

phase constituent of the alloy corresponding to the three stages is evolved from quasicrystal to isomorphous system Al2Zr3 and NiZr3 phase and then to isomorphous system CuZr2 phase

cubic system NiZr2 phase and orthothombic system Al3Zr2 phase.Meanwhile

crystallized product and grain size in every stage are slightly related to the heating rates.It is observed that crystallization behavior at the second stage can inhibit ones at first stage with high heating rates.