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arXiv 1905.06007cond-mat.mtrl-scicond-mat.dis-nncond-mat.mes-hall
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Nb掺杂Ni体系弹性性质的预测

Prediction on Elastic Properties of Nb-doped Ni Systems

Jia Song, Zhibin Gao, Liang Zhang, Wenheng Wu, Beibei He, Lin Lu

摘要:

在第一性原理模拟的基础上,系统地研究了5种Nb掺杂Ni体系的结构、形成焓和力学性能(弹性常数、体积模量、剪切模量和硬度)。计算的平衡体积随Nb浓度的增加而增加。计算的弹性常数和形成焓表明,所有的Nb掺杂的Ni系统是机械和化学稳定的在我们的研究。在准确计算了体系的体积模量和剪切模量后,还可以预测体系的硬度。结果表明,当Nb含量低于4.9%时,硬度随Nb含量的增加而增加,超过4.9%后,硬度在本研究范围内有所下降。

英文摘要:

On the basis of the first principles simulation, the structure, formation enthalpy, and mechanical properties (elastic constant, bulk, and shear modulus and hardness) of five Nb-doped Ni systems are systematically studied. The calculated equilibrium volume increases with the Nb concentration increasing. The computational elastic constants and formation enthalpy indicate that all Nb-doped Ni systems are mechanically and thermodynamically stable in our research. The hardness of these systems also be predicted after the bulk modulus and shear modulus have been accurately calculated. The results show that the hardness increases with the Nb concentration increasing when the Nb concentration below 4.9%, beyond which the hardness will decrease within the scope of our study.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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