Elastic anisotropy of OsB2 and RuB2 from first-principles study

JOURNAL OF ALLOYS AND COMPOUNDS

卷:453

Article

Hao, Xianfeng^1,3  Xu, Yuanhui²  Wu, Zhijian¹  Zhou, Defeng²  Liu, Xiaojuan¹  Meng, Jian¹ 

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China

[2] Changchun Univ Technol, Sch Biol Engn, Changchun 130012, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

关键词: OsB2 and RuB2;    density functional theory;    elastic constants;    anisotropy;   

DOI  :  10.1016/j.jallcom.2006.11.153

来源: Elsevier

【 摘 要 】

The elastic anisotropy of the potential low compressible and hard materials OsB2 and RuB2 were studied by first-principles investigation within density functional theory. The structure, elastic constants, bulk modulus, shear modulus, Poisson's ratio and Debye temperature have been calculated within both local density approximation (LDA) and generalized gradient approximation (GGA). The results indicated that the calculated bulk modulus and shear modulus were in good agreement with the experimental and previous theoretical studies. The calculated elastic constants anisotropic factors and directional bulk modulus showed that OsB2 and RuB2 possess high elastic anisotropic. (c) 2006 Elsevier B.V. All rights reserved.

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