Mechanical properties and electronic structures of M23C6 (M = Fe, Cr, Mn)-type multicomponent carbides

Mechanical properties and electronic structures of M23C6 (M = Fe, Cr, Mn)-type multicomponent carbides
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M23C6(M=Fe、Cr、Mn)型多元碳化物的力学性能和电子结构

DOI:
10.1016/j.jallcom.2015.07.048
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发表时间:
2015-11
影响因子:
6.2
通讯作者:
Feng, Jing
Feng, Jing
中科院分区:
材料科学2区
文献类型:
--
作者:
Jiang, Yehua;Xing, Ji;ong;Zhou, Rong;Feng, Jing

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采用第一性原理计算方法系统研究了M23 C6-(M = Fe,Cr,Mn)和M23 C6型多元碳化物的力学和电学性质。结合能和形成焓的值显示出这些碳化物的结晶稳定结构。分别采用应力-应变法和Voigt-Reuss-Hill近似计算弹性常数和弹性模量。在M23 C6化合物中掺杂Fe或Mo的力学性能比纯相Cr23 C6、Mn 23 C6和Fe 23 C6有上级的提高。这些化合物的力学各向异性说明从各向异性指数和不同形状的表面轮廓的杨氏模量。M23 C6化合物的总态密度表明,M23 C6化合物的成键行为是金属键和共价键的结合.
The mechanical and electronic properties of M23C6- (M = Fe, Cr, Mn) and M23C6-type multicomponent carbides are investigated systematically by first-principles calculations. The values of cohesive energy and formation enthalpy exhibited thermodynamically stable structures of these carbides. The stress–strain method and Voigt-Reuss-Hill approximation were used to calculate the elastic constants and moduli, respectively. The mechanical properties of the doped Fe or Mo in M23C6compounds are superior to the pure phases of Cr23C6, Mn23C6and Fe23C6. Mechanical anisotropy of these compounds was illustrated from the anisotropic index and different shapes of the surface contour by Young's modulus. Moreover, the total density of states of M23C6compounds indicated that the bonding behaviors of M23C6compounds were combinations of metallic and covalent bonds.
eta M3W3C(M=Fe、Co、Ni)化合物稳定性和力学性能的第一性原理研究
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发表时间: 2010-02
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