Generalized bond-strength model of Vickers hardness: application to Cr.sub.4./sub.B, CrB, CrB.sub.2./sub., CrB.sub.4./sub., Mo.sub.2./sub.B, MoB.sub.2./sub., OsB.sub.2./sub., ReB.sub.2./sub., WB.sub.2./sub., WB.sub.3./sub. and Ti.sub.1.87./sub.B.sub.50./sub.

0479134 - FZÚ 2018 RIV NL eng J - Journal Article
Šimůnek, Antonín - Dušek, Michal
Generalized bond-strength model of Vickers hardness: application to Cr₄B, CrB, CrB₂, CrB₄, Mo₂B, MoB₂, OsB₂, ReB₂, WB₂, WB₃ and Ti_1.87B₅₀.
Mechanics of Materials. Roč. 112, Sep (2017), s. 71-75. ISSN 0167-6636. E-ISSN 1872-7743
R&D Projects: GA MŠMT LO1603
EU Projects: European Commission(XE) CZ.2.16/3.1.00/24510
Institutional support: RVO:68378271
Keywords : hardness * microscopic model * transition-metal borides * hard and superhard materials
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.697, year: 2017

The bond-strength model of Vickers hardness is generalized that can be utilized for any structure with covalent or polar-covalent bonds. We have applied the method to Cr4B, CrB, CrB2, CrB4, Mo2B, MoB2, OsB2, ReB2, WB2, WB3 and Ti1.87B50 , and found the hardness of these borides to be within the range of 9–33 GPa, in good agreement with experimental data. The generalization of the well-tried bond-strength model is inevitable for complex structures, opens up broader applications of its use and forms a practical tool for material scientists in the design of superhard materials.

Permanent Link: http://hdl.handle.net/11104/0275195