Stress-induced preferential alignment of basal planes in phenolic-based carbon-carbon composite

Ju, C.P.; Watahiki, Sumio; Takano, S.

doi:10.1016/0254-0584(93)90024-g

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Therefore, in the pitch-based matrix composites, cracks are generated at the fiber/matrix interface because of the mismatch of the thermal shrinkage rate between the fiber and matrix. [31][32][33][34] Although the CF surface treatment can improve the interface adhesion, the formation of cracks cannot be avoided because the volume of pitch shrinks and the volume of CF remains unchanged. The cracks eventually become stress concentration points, limiting the high performance of the fibers and leading to failure of the composite.…”

Section: Introductionmentioning

confidence: 99%

Improving carbon/carbon composites mechanical and thermal properties by the co‐carbonization of pre‐oxidized carbon fiber and pitch

Yang

et al. 2021

J of Applied Polymer Sci

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The interfacial cracks generated during the high-temperature carbonization process, caused by the mismatch of thermal shrinkage rate between the fiber and matrix, limit the huge application potential of C/C composites. In this study, pre-oxidized carbon fiber (OPF) prepared from pitch, as a reinforcement, was introduced into the pitch-based carbon matrix to realize the co-carbonization of OPF and pitch. The results showed that the mechanical and thermal properties of the OPF-reinforced C/C composites were significantly improved. The compressive strength and flexural strength were 136.97 and 46.71 MPa, respectively, both were about 2.5 times higher than those of pristine C/C composites. And OPF-C/Cs had a carbon residual of about 30% at 800 C, which was 2.8, 4.4, and 2.1 times higher than that of Pristine-C/Cs, CF-C/ Cs, and MCF-C/Cs, respectively. The rough surface and abundant active sites of OPF could promote the growth of the graphite microcrystalline structure, resulting in an excellent fiber/matrix interface. Moreover, the adaptive expansion of OPF occurred during the co-carbonization process with pitch, which inhibited the generation of cracks at the fiber/matrix interface. Owing to its excellent affinity with pitch, OPF is believed to have a wide range of promising applications in highperformance C/C composites that require high-temperature treatment.

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Section: Introductionmentioning

confidence: 99%