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Li R.-Y.,Kunming University of Science and Technology | Duan Y.-H.,Kunming University of Science and Technology | Duan Y.-H.,Key Laboratory of Advance Materials in Rare & Precious and Nonferrous Metals of Ministry of Education
Philosophical Magazine | Year: 2016

First principles calculations were performed to systematically investigate structure properties, phase stability and mechanical properties of MB (M = Cr, Mo, W) monoborides in orthorhombic and tetragonal structures. The results of equilibrium structures are in good agreement with other available theoretical and experimental data. The elastic properties, including bulk modulus B, shear modulus G, Young’s modulus E and Poisson’s ratio ν were calculated by the Voigt-Reuss-Hill approximation. All considered monoborides are mechanically stable. The results of elastic anisotropies show that elastic anisotropy of orthorhombic structure is larger than that of tetragonal structure. Moreover, the minimum thermal conductivities were also estimated using the Cahill’s model, and the results indicate that the minimum thermal conductivities show a dependence on directions. © 2016 Taylor & Francis Source

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