A “universal” criterion for metallic glass formation
A “universal” criterion for metallic glass formation
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DOI：
10.1063/1.4731881
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发表时间：
2012-06
影响因子：
4
通讯作者：
Li-Min Wang;Yongjun Tian;Riping Liu;Weihua Wang
中科院分区：
文献类型：
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作者：
Li-Min Wang;Yongjun Tian;Riping Liu;Weihua Wang
根据从二元系到多元系的十类金属基合金的热力学和动力学性质，我们建立了形成金属玻璃所需的临界冷却速率Rc的普遍适用的判据。研究发现，Rc取决于材料的几个基本性质，包括玻璃化转变温度(相对于液相线温度归一化)、熔化熵和动力学脆性。该关系式很好地再现了43种金属玻璃的RC值，R2值为0.94。Rc的解释为寻找金属玻璃提供了指导。
We have established a generally applicable criterion for the critical cooling rates Rc needed for the formation of metallic glasses, based on thermodynamic and kinetic properties of ten categories of metal-based alloys ranging from binary to multicomponent systems. Rc is found to depend on several fundamental properties of materials including the glass transition temperature (normalized with respect to the liquidus temperature), entropy of fusion, and kinetic fragility. Such a relation reproduces the experimental Rc values of 43 metallic glasses remarkably well with a R2 value of 0.94. The explanation of Rc provides guidance in search of metallic glasses.