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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Crystallization kinetics of Cu47Zr47Al6 and (Cu47Zr47Al6)(99)Sn-1 bulk metallic glasses
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Crystallization kinetics of Cu47Zr47Al6 and (Cu47Zr47Al6)(99)Sn-1 bulk metallic glasses

机译：Cu47ZR47AL6和（Cu47ZR47AL6）（99）SN-1散装金属玻璃的结晶动力学

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摘要

Crystallization kinetics of Cu47Zr47Al6 and (Cu47Zr47Al6)(99)Sn-1 bulk metallic glasses in the non-isothermal and isothermal conditions were investigated by differential scanning calorimetry (DSC). In non-isothermal condition, the crystallization activation energy was determined by various methods, and the Sn-containing glassy alloy showed higher crystallization activation energy than that of the base alloy, that means the Sn addition delayed crystallization transformation. In the isothermal condition, the Sn-containing BMG shows longer incubation time and wider crystallization transformation peak than that of the Sn free sample alloy, at the same annealing temperature. The time-temperature-transformation (ITT) diagram signified that the Sn addition delayed the crystallization and consequently improved the GFA. In isothermal conditions, the Avrami exponents vary from 3.75 to 5.31 and 3.88 to 4.08 for Cu47Zr47Al6 and (Cu47Zr47Al6)(99)Sn-1 BMGs, respectively. According to Avrami's model, these numbers indicate that the crystallization of both glassy alloys is governed by three-dimensional growth with an increasing nucleation rate, while Sn addition decreases the nucleation rate.
机译：通过差示扫描量热法（DSC）研究了Cu47Zr47Al6和（Cu47Zr47Al6）（99）Sn-1块状金属玻璃的Sn-1块状金属玻璃。在非等温条件下，结晶活化能量通过各种方法测定，并且含Sn的玻璃合金显示出比基础合金的结晶活化能量较高，这意味着Sn加成延迟结晶转化。在等温条件下，含Sn的BMG显示比SN游离样品合金的孵育时间和更宽的结晶转化峰值相同的退火温度。时间温度变换（ITT）图表示SN添加延迟结晶并因此改善了GFA。在等温条件下，AVRAMI指数分别从3.75至5.31和3.88至4.08分别为CU47ZR47AL6和（CU47ZR47AL6）（99）SN-1 BMG。根据Avrami的型号，这些数字表明，玻璃合金的结晶是通过三维生长的核心速度，随着核心的增加，而SN添加降低成核速率。

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