Thermodynamic Model of Hardness: Particular Case of BoronRich Solids - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Superhard Materials Année : 2010

Thermodynamic Model of Hardness: Particular Case of BoronRich Solids

Résumé

A number of successful theoretical models of hardness have been developed recently. A ther modynamic model of hardness, which supposes the intrinsic character of correlation between hardness and thermodynamic properties of solids, allows one to predict hardness of known or even hypothetical sol ids from the data on Gibbs energy of atomization of the elements, which implicitly determine the energy density per chemical bonding. The only structural data needed is the coordination number of the atoms in a lattice. Using this approach, the hardness of known and hypothetical polymorphs of pure boron and a number of boronrich solids has been calculated. The thermodynamic interpretation of the bonding energy allows one to predict the hardness as a function of thermodynamic parameters. In particular, the excellent agreement between experimental and calculated values has been observed not only for the room temperature values of the Vickers hardness of stoichiometric compounds, but also for its temperature and concentration dependencies.

Dates et versions

hal-00568736 , version 1 (23-02-2011)

Identifiants

Citer

V. A. Mukhanov, O. Kurakevych, V. L. Solozhenko. Thermodynamic Model of Hardness: Particular Case of BoronRich Solids. Journal of Superhard Materials, 2010, 32 (3), pp.167-176. ⟨10.3103/S1063457610030032⟩. ⟨hal-00568736⟩
127 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More