Effects of vacancy on the thermodynamic properties of Co-Cr-Fe-Mn-Ni high-entropy alloys

Effects of vacancy on the thermodynamic properties of Co-Cr-Fe-Mn-Ni high-entropy alloys
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空位对Co-Cr-Fe-Mn-Ni高熵合金热力学性能的影响

DOI:
10.1016/j.jallcom.2021.160944
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发表时间:
2021-12
影响因子:
6.2
通讯作者:
Tian Fuyang
Tian Fuyang
中科院分区:
材料科学2区
文献类型:
--
作者:
Song Hongquan;Ma Qianjin;Zhang Wei;Tian Fuyang

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空位作为辐射损伤的重要产物,是一个值得研究的课题,特别是对于高熵合金(HEAs)。本文采用第一性原理方法研究了含空位的Co-Cr-Fe-Mn-Ni异质外延薄膜的声子态密度和热力学性质。我们发现等摩尔CoCrNi、CoCrFeNi和CoCrFeMnNi的原子半径与局域化学环境有关,与声子信息和振动熵有关。空位导致振动熵和热容的增加。
As an important product of radiation damage, the vacancy is a topic worthy of our discussion, especially for high-entropy alloys (HEAs). In this work, the phonon density of states (DOS) and thermodynamic properties of Co-Cr-Fe-Mn-Ni HEAs with the vacancy are studied based on the first-principles method. We find that the atomic radius dependent on local chemical environment is related to the phonon information and vibration entropy on the equal molar CoCrNi, CoCrFeNi and CoCrFeMnNi. The vacancy leads to an increase in the vibrational entropy and heat capacity.
DOI: --
发表时间: 2014
影响因子: 8.6
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