Study on mechanical and tribological properties of C/C composites by CVI and PIP

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Emerging Materials Research Pub Date : 2022-12-01 DOI:10.1680/jemmr.22.00089

Fei Li, Yuqin Ma, Wei Xu, Wen Zhu, G. Wang, Yi Xu, Haiyin Guo, Yatao Li

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引用次数: 1

Abstract

Carbon/carbon (C/C) composites are created through chemical vapor infiltration and precursor infiltration and pyrolysis. The bending, compressive, and friction properties of C/C composites and graphite materials are compared and studied. The influence of fiber volume fraction on the mechanical properties of the specimen is investigated. The results reveal that increasing the volume fraction of Z-direction fiber improves the mechanical characteristics of the composites significantly. The bending strength of C/C composites is 66.27%-123.18% higher than that of graphite materials, while the compressive strength in Z-direction is 13%-31% greater than that of graphite. Wear is about 33% lower than in graphite materials. The C/C composites have a more continuous infiltration structure, which promotes the smooth transfer of stress in the composites and enhances their mechanical bearing capacity of the composites. In addition, when C/C composites are subjected to friction and wear, the fiber bundles are difficult to come off due to the close surrounding of the matrix, resulting in less wear.

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用CVI和PIP研究C/C复合材料的力学和摩擦学性能

碳/碳(C/C)复合材料是通过化学蒸汽渗透和前驱体渗透和热解制备的。对比研究了C/C复合材料与石墨材料的弯曲、压缩和摩擦性能。研究了纤维体积分数对试样力学性能的影响。结果表明，增加z向纤维的体积分数可显著改善复合材料的力学性能。C/C复合材料的抗弯强度比石墨材料高66.27% ~ 123.18%，z向抗压强度比石墨材料高13% ~ 31%。磨损比石墨材料低33%左右。C/C复合材料具有更连续的渗透结构，促进了应力在复合材料中的平滑传递，增强了复合材料的力学承载能力。此外，当C/C复合材料受到摩擦磨损时，由于基体的紧密包围，纤维束很难脱落，从而减少了磨损。

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来源期刊

Emerging Materials Research MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

9.10%

发文量

期刊介绍： Materials Research is constantly evolving and correlations between process, structure, properties and performance which are application specific require expert understanding at the macro-, micro- and nano-scale. The ability to intelligently manipulate material properties and tailor them for desired applications is of constant interest and challenge within universities, national labs and industry.