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High thermal conductivity of diamond/copper composites produced with Cu–ZrC double-layer coated diamond particles

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Abstract

A new method was proposed to fabricate diamond/Cu composites. Double-layer diamond particles were directly compressed at ultra-high pressure to prepare the preform and then sintered in a vacuum equipment for densification. The raw diamond particles were coated with zirconium carbide by magnetron sputtering for the inner layer and then deposited with copper by chemical method for the outer layer. Prepared with these particles, the composites had good interface bonding and homogeneously distributed particles in the copper matrix. The thermal conductivity of 65 vol% diamond/Cu composite was as high as 720 W m−1 K−1. When the diamond content increased to 70 vol%, the coefficient of thermal expansion was extremely low (4.33 × 10−6/K). With superb thermal–physical performance, diamond/Cu composites are potentially applicable to electronic packaging.

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Acknowledgements

This project is financially supported by the National Key R&D Program of China (2016YFB0301400) and the National Natural Science Foundation of China (Grant No. 51274040).

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Authors and Affiliations

  1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xue Yuan Road, Beijing, 100083, People’s Republic of China

    Yanpeng Pan, Xinbo He, Shubin Ren, Mao Wu & Xuanhui Qu

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  1. Yanpeng Pan
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  2. Xinbo He
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  3. Shubin Ren
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  4. Mao Wu
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  5. Xuanhui Qu
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Correspondence to Xinbo He.

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Pan, Y., He, X., Ren, S. et al. High thermal conductivity of diamond/copper composites produced with Cu–ZrC double-layer coated diamond particles. J Mater Sci 53, 8978–8988 (2018). https://doi.org/10.1007/s10853-018-2184-9

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  • DOI: https://doi.org/10.1007/s10853-018-2184-9

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