Theoretical prediction of interfacial thermal conductance at high temperature across solid-solid interfaces

2020/11/14 by Jinxin Zhong, Zhong, Jinxin, Zhiguo Wang +7
Materials Science · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Thermal properties of materials

paper · pdf · doi:10.48550/arxiv.2011.07245

openalex publication_date 2020/11/14 · openalex created_date 2020/11/23 · openalex updated_date 2026/07/28

Abstract

The existed theories and methods for calculating interfacial thermal conductance of solid-solid interface lead to diverse values that deviate from experimental measurements. In this letter, We propose a model to estimate the ITC at high temperature without comprehensive calculations, where the interface between two dissimilar solids can be treated as an amorphous thin layer and the coordination number density across interface becomes a key parameter. Our model predicts that the ITCs of various interfaces at 300K are in a narrow range: 10⁷W m^-2K^-1 ∼ 10⁹ W m^-2 K^-1, which is in good agreement with the experimental measurement.

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