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| Effects of Particle Impacting on Ablation Property of C/C-ZrC-SiC Composites Via Injection Method |
| Received:May 22, 2019 Revised:June 24, 2019 |
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| DOI：10.7643/issn.1672-9242.2019.10.002 |
| KeyWord:C/C-ZrC-SiC composites matrix modification ZrC SiC particle erosion high temperature ablation property |
| Author | Institution |
| LIU Tian-yu |
Shaanxi Province C/C Composites Technology Research Center, Northwestern Polytechnical University, Xi′an , China |
| FU Qian-gang |
Shaanxi Province C/C Composites Technology Research Center, Northwestern Polytechnical University, Xi′an , China |
| CHENG Chun-yu |
Shaanxi Province C/C Composites Technology Research Center, Northwestern Polytechnical University, Xi′an , China |
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| Abstract: |
| Objective To study the ablation behavior of modified composites damaged by particle impacting by modifying C/C composites with ZrC and SiC composite ceramics. Methods C/C composites were prepared by Isothermal Chemical vapor Infiltration (ICVI), and the precursors of ZrC and SiC ceramics were introduced into C/C composites by injection. Then the C/C-ZrC-SiC composites were prepared by heat-treatment and ICVI. The ablation resistance of the composites damaged by particle erosion was tested by high-speed particle impacting and oxyacetylene torch tests. Results The linear erosion rate and mass erosion rate of the modified material were 253.1 um/s and 79.8 mg/s respectively, which were 49.2% and 61% lower than those of the C/C composites with the same porosity. The linear ablation rate and mass ablation rate of the composites damaged by particle erosion were 4.26 um/s and 1.44 mg/s respectively, which were 37% and 39% lower than those of the C/C composites with the same porosity. Conclusion The hardness of ZrC and SiC ceramics is higher than that of carbon matrix, and it’s ceramic phase in the composite plays a role of impact resistance, which greatly improves the erosion resistance of the modified composites. There are still high-temperature ceramics phase in the C/C-ZrC-SiC composites damaged by particle impacting. The formed ZrO2 skeleton structure and SiO2 spherical particles in the composites can protect the carbon fibers and pyrolytic carbon matrix efficiently. |
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