First-principles investigation of the elastic and thermodynamic properties of ReC2 (Re = Ho, Nd, Pr)

First-principles investigation of the elastic and thermodynamic properties of ReC2 (Re = Ho, Nd, Pr)
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ReC2(Re = Ho、Nd、Pr)弹性和热力学性质的第一性原理研究

DOI:
10.1142/s021798491450256x
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发表时间:
2015-01
影响因子:
1.9
通讯作者:
Chen Haichuan
Chen Haichuan
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Huang Wen;Chen Haichuan

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采用第一性原理密度泛函理论在广义梯度近似下研究了ReC 2(Re = Ho,Nd,Pr)的弹性和热力学性质.计算得到的ReC 2的晶格常数与实验数据符合较好。计算的弹性常数表明,所有的化合物是机械稳定的。计算了剪切模量、杨氏模量、泊松比σ、B/G、剪切各向异性和弹性各向异性。最后,预测了合金的维氏硬度、德拜温度、熔点和热导率。
The elastic and thermodynamic properties of ReC2 (Re = Ho, Nd, Pr) have been investigated by using the first-principles density functional theory within the generalized gradient approximation. The computed lattice constants of ReC2 are in agreement with the experimental data. The calculated elastic constants reveal that all compounds are mechanically stable. The shear modulus, Young's modulus, Poisson's ratio σ, the ratio B/G, shear anisotropy and elastic anisotropy are also calculated. Finally, the Vicker hardness, Debye temperature, melting point and thermal conductivity have been predicted.
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影响因子: 2.8
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