MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Thermal Expansion Calculated by Continuous Displacement Cluster Variation Method
Tetsuo Mohri
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2008 Volume 49 Issue 11 Pages 2515-2520

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Abstract

Thermal expansion of a single component system in a two dimensional square lattice is calculated by employing Continuous Displacement Cluster Variation Method. It is demonstrated that the entropy effect arising from the freedom of local atomic displacements drives the thermal expansion. The coefficient of thermal expansion curve is compared with the one calculated based on Debye-Grüneisen model within the quasi-harmonic approximation. The two curves demonstrate opposite behavior.

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© 2008 The Japan Institute of Metals and Materials
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