Extension of the diffuse mismatch model for thermal boundary conductance between isotropic and anisotropic materials

Duda, John C.; Smoyer, Justin L.; Norris, Pamela M.; Hopkins, Patrick E.
July 2009
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p031912
Academic Journal
This model is an extension of the diffuse mismatch model (DMM), tailored to accurately predict thermal boundary conductance (hBD) at interfaces where one material comprising the interface is characterized by high elastic anisotropy. Temperature-dependent specific heat is calculated with this vibrational model and compared to published values. Modifications to the DMM that incorporate the vibrational model are presented with predictions of hBD at a metal-graphite interface. This model slightly underestimates experimental data, as expected, as the large acoustic mismatch between metals and graphite suggests inelastic scattering, something the DMM does not take into account.


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