Thermodynamics of vacancies and clusters in high-entropy alloys
Thermodynamics of vacancies and clusters in high-entropy alloys
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DOI：
10.1103/physrevmaterials.1.043601
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发表时间：
2017-09
影响因子：
3.4
通讯作者：
Zhijun Wang;C. Liu;P. Dou
中科院分区：
文献类型：
--
作者：
Zhijun Wang;C. Liu;P. Dou
通过热力学分析，我们提供了有趣的证据表明，平衡空位浓度和它们的团簇在高熵合金（HEAs）明显大于那些在纯金属和简单的二元合金。增加的缺陷浓度强烈地改变HEAs的热力学和动力学性质。有了这些研究结果，我们预测一个强大的重组倾向的空位和marttials从辐射轰击激发后，结果是有利的兼容与最近的实验上的上级抗辐射HEAs。HEAs中的空位和团簇的热力学将对涉及许多热力学和动力学性质的先进材料的设计产生极大的兴趣，例如热导率、扩散率、沉淀、蠕变和辐照损伤。
By means of thermodynamic analyses, we provide the intriguing evidence that the equilibrium vacancy concentrations and their clusters in high entropy alloys (HEAs) are substantially larger than those in pure metals and simple binary alloys. The increased defect concentrations strongly change the thermodynamic and kinetic properties of the HEAs. With these findings, we predict a strong recombination tendency of vacancies and interstitials after excitation from radiation bombardments, and the results are favorably compatible with very recent experiments on the superior radiation resistance of HEAs. The thermodynamics of vacancies and clusters in HEAs will be of great interest to the design of advanced materials involving many thermodynamic and kinetic properties such as thermal conductivity, diffusivity, precipitation, creep, and irradiation damage.