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arXiv 1209.0955cond-mat.mtrl-sci
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Cr-Al-N弹性性质的第一性原理研究

First-principles study of elastic properties of Cr-Al-N

Liangcai Zhou, David Holec, Paul H. Mayrhofer

摘要:

在密度泛函理论(DFT)的框架下,采用应力-应变和能量-应变方法研究了顺磁性立方相B1(c-)Cr 1-xAlxN三元合金的弹性性质。一个强大的组成依赖的弹性性能的预测。杨氏模量E和剪切模量G表现出与实验测量的硬度值相同的组成趋势(即随Al含量增加),而体积模量B几乎保持恒定。在c-Cr 1-xAlxN的各向同性弹性响应的预测浓度约为x=0.50。在整个成分范围内,c-Cr 1-xAlxN涂层的脆性行为和定向结合特征都占主导地位,并且随着Al含量的增加而变得更加明显。

英文摘要:

The elastic properties of paramagnetic cubic B1 (c-) Cr1-xAlxN ternary alloys are studied using stress-strain and energy-strain methods within the framework of Density Functional Theory (DFT). A strong compositional dependence of the elastic properties is predicted. Young's modulus, E, and shear modulus, G, exhibit the same compositional trends as experimentally measured hardness values (i.e. increasing with Al content), while bulk modulus, B, remains almost constant. The isotropic elastic response in the c-Cr1-xAlxN is predicted for concentrations around x=0.50. Brittle behavior and directional bonding characteristics are predominant in the c-Cr1-xAlxN coatings in the whole composition range, and become more pronounced with increasing Al content.

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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