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Predicted interfacial thermal conductance and thermal conductivity of diamond/Al composites with various interfacial coatings

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Abstract

The interfacial thermal conductance (ITC) and thermal conductivity (TC) of diamond/Al composites with various coatings were theoretically studied and discussed. A series of predictions and numerical analyses were performed to investigate the effect of thickness, sound velocity, and other parameters of coating layers on the ITC and TC. It is found that both the ITC and TC decline with increasing coating thickness, especially for the coatings with relatively low thermal conductivity. Nevertheless, if the coating thickness is close to zero, or quite a small value, the ITC and TC are mainly determined by the constants of the coating material. Under this condition, coatings such as Ni, TiC, Mo2C, SiC, and Si can significantly improve the ITC and TC of diamond/Al composites. By contrast, coatings like Ag will exert the negative effect. Taking the optimization of interfacial bonding into account, conductive carbides such as TiC or Mo2C with low thickness can be the most suitable coatings for diamond/Al composites.

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Xuebing Liang, Chengchang Jia & Hui Chen

  2. General Research Institute for Nonferrous Metals (GRINM), Beijing, 100083, China

    Ke Chu

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  1. Xuebing Liang
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  2. Chengchang Jia
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  3. Ke Chu
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  4. Hui Chen
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Correspondence to Xuebing Liang.

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Liang, X., Jia, C., Chu, K. et al. Predicted interfacial thermal conductance and thermal conductivity of diamond/Al composites with various interfacial coatings. Rare Metals 30, 544–549 (2011). https://doi.org/10.1007/s12598-011-0427-x

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  • DOI: https://doi.org/10.1007/s12598-011-0427-x

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