Temperature dependent thermoelastic properties of some fcc crystals

Some thermoelastic properties, such as, second- and third-order elastic constants ( C ij , C ijk ) thermal expansion coefficient ( β), Anderson–Grünesien parameter ( δ), Grüneisen parameter ( γ), bulk modulus ( B) are calculated for some fcc crystals. Total energy ( W) is assumed to be the sum of th...

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Bibliographic Details
Published in:Solid state sciences 2002-02, Vol.4 (2), p.255-259
Main Authors: CIFTCI, Yasemin Öztekin, COLAKOGLU, Kemal
Format: Article
Language:English
Subjects:
Applied sciences
Bulk modulus
Condensed matter: structure, mechanical and thermal properties
Elastic moduli
Elasticity, elastic constants
Exact sciences and technology
Grüneisen parameter
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Pairwise potential
Physics
Thermoelastic properties
Volume dependent energy
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Summary:Some thermoelastic properties, such as, second- and third-order elastic constants ( C ij , C ijk ) thermal expansion coefficient ( β), Anderson–Grünesien parameter ( δ), Grüneisen parameter ( γ), bulk modulus ( B) are calculated for some fcc crystals. Total energy ( W) is assumed to be the sum of the central pairwise potential (extended generalized exponential energy EGEP) and volume dependent energy ( W v). In this model, the temperature is related to the total energy as W 0( r)exp[− πk B Tr/(ℏ v F)]. The obtained results are compared with the available experimental data and, generally, the agreement is good. Graphic
ISSN:1293-2558
1873-3085
DOI:10.1016/S1293-2558(01)01246-8