摘要
C/C composites were prepared by resin infiltration and pyrolysis with 3D needle-punched carbon fiber preforms. The reactive melt infiltration process was used subsequently to prepare C/SiC composites, and the liquid Si or Si-Mo alloy was used as the reactive melt. The microstructure evolution during the preparation process of C/C composites was investigated. The results indicate that resin mainly exists in the small pores of the fiber bundles. Pores become more and bigger but there are dense C/C segments within the fiber bundles after pyrolysis. High temperature treatment leads to a higher graphitization degree and makes the closed pores open, which acts as the channel for silicon infiltration. Some fibers inside the fiber bundles of C/SiC composite infiltrated by Si are damaged and much residual Si exists in big pores. When C/SiC composites are fabricated by Si-Mo infiltration, the remaining Si content is reduced, the damage of fibers inside the fiber bundles is much slighter and the C/C segments remain intact.
源语言 | 英语 |
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页(从-至) | 105-111 |
页数 | 7 |
期刊 | Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica |
卷 | 26 |
期 | 5 |
出版状态 | 已出版 - 10月 2009 |