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Effect of graphite powder as a forming filler on the mechanical properties of SiCp/Al composites by pressure infiltration

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Abstract

(38vol% SiCp + 2vol% Al2O3f)/2024 Al composites were fabricated by pressure infiltration. Graphite powder was introduced as a forming filler in preform preparation, and the effects of the powder size on the microstructures and mechanical properties of the final composites were investigated. The results showed that the composite with 15 μm graphite powder as a forming filler had the maximum tensile strength of 506 MPa, maximum yield strength of 489 MPa, and maximum elongation of 1.2%, which decreased to 490 MPa, 430 MPa, and 0.4%, respectively, on increasing the graphite powder size from 15 to 60 μm. The composite with 60 μm graphite powder showed the highest elastic modulus, and the value decreased from 129 to 113 GPa on decreasing the graphite powder size from 60 to 15 μm. The differences between these properties are related to the different microstructures of the corresponding composites, which determine their failure modes.

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Authors and Affiliations

  1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Wei Cui, Hui Xu, Jian-hao Chen, Shu-bin Ren, Xin-bo He & Xuan-hui Qu

  2. The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Xuan-hui Qu

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  1. Wei Cui
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  2. Hui Xu
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  3. Jian-hao Chen
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  4. Shu-bin Ren
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  5. Xin-bo He
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  6. Xuan-hui Qu
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Correspondence to Shu-bin Ren.

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Cui, W., Xu, H., Chen, Jh. et al. Effect of graphite powder as a forming filler on the mechanical properties of SiCp/Al composites by pressure infiltration. Int J Miner Metall Mater 23, 601–607 (2016). https://doi.org/10.1007/s12613-016-1272-6

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  • DOI: https://doi.org/10.1007/s12613-016-1272-6

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