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arXiv 1601.07397cond-mat.mtrl-sci
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Cu-Hf,Zr合金块体玻璃形成能力的成因

On the origin of bulk glass forming ability in Cu-Hf, Zr alloys

Ramir Ristić, Krešo Zadro, Damir Pajić, Ignacio A. Figueroa, Emil Babić

摘要:

了解金属系统中块体金属玻璃(BMG)的形成并找到一个可靠的BMG成分选择标准是凝聚态物理和材料科学中最重要的问题之一。使用非晶和结晶Cu-Hf合金(30-70原子% Cu)的磁化率测量的结果,我们发现相应的玻璃和结晶合金的磁化率的差异和在这些合金的玻璃形成能力(GFA)的变化之间的相关性。由于相同的相关性可以从与Cu-Zr合金的电子结构相关的性质的数据中推断出来,因此它似乎相当普遍,并且可以应用于基于早过渡金属和晚过渡金属的其他玻璃态合金。从自由能考虑,这种相关性是合理的,并提供了一种选择具有高GFA的组合物的简单方法。

英文摘要:

Understanding the formation of bulk metallic glasses (BMG) in metallic systems and finding a reliable criterion for selection of BMG compositions are among the most important issues in condensed matter physics and material science. Using the results of magnetic susceptibility measurements performed on both amorphous and crystallized Cu-Hf alloys (30-70 at% Cu) we find a correlation between the difference in magnetic susceptibilities of corresponding glassy and crystalline alloys and the variation in the glass forming ability (GFA) in these alloys. Since the same correlation can be inferred from data for the properties associated with the electronic structure of Cu-Zr alloys, it seems quite general and may apply to other glassy alloys based on early and late transition metals. This correlation is plausible from the free energy considerations and provides a simple way to select the compositions with high GFA.

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