Abstract
To improve the toughness and strength of C/C-SiC composites, carbon fiber reinforced carbon, silicon carbide, and copper alloy hybrid composite were designed and prepared via Cu-Si alloy melt infiltration at low temperature. The as-prepared composite was mainly composed of C, SiC, Cu3Si, and Si phases. Due to the introduction of ductile Cu alloy in the matrix, the composite exhibited good mechanical properties, especially fracture toughness. Cu reacted with Si to produce the Cu3Si phase in the composite’s matrix, which reduced the residual silicon in the normal C/C-SiC composite. The bending strength of the as-prepared composite reached about 258.75 MPa and the fracture toughness was up to about 13.55 MPa·m1/2. The improved toughness of the as-prepared composite was mainly attributed to the introduction of soft Cu3Si phase.
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Funding
This work was supported by National Natural Science Foundation of China (No. 92166105 and 52005053), High-Tech Industry Science and Technology Innovation Leading Program of Hunan Province (No.2020GK2085), and The Science and Technology Innovation Program of Hunan Province (No. 2021RC3096).
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Y.G. Tong, L. Wang, and B. Wang contributed the central idea, analyzed most of the data, and wrote the initial draft of the paper. The remaining authors contributed to refining the ideas, carrying out additional analyses, and finalizing this paper.
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Tong, Y., Wang, L., Wang, B. et al. Microstructure and mechanical behavior of carbon fiber reinforced carbon, silicon carbide, and copper alloy hybrid composite fabricated by Cu-Si alloy melt infiltration. Adv Compos Hybrid Mater 6, 25 (2023). https://doi.org/10.1007/s42114-022-00612-1
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DOI: https://doi.org/10.1007/s42114-022-00612-1