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| Anti-ablation Properties of C/YAG Composite |
| Received:March 15, 2019 Revised:April 18, 2019 |
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| DOI：10.7643/issn.1672-9242.2019.10.005 |
| KeyWord:yttrium aluminum garnet carbon fiber needled felt anti-ablation property |
| Author | Institution |
| SHAN Bo-rong |
a. College of Aerospace Science and Engineering, b. Key Laboratory of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha, , China |
| MA Qing-song |
a. College of Aerospace Science and Engineering, b. Key Laboratory of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha, , China |
| ZENG Kuan-hong |
a. College of Aerospace Science and Engineering, b. Key Laboratory of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha, , China |
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| Abstract: |
| Objective To investigate theablation properties and mechanism of C/YAG composite Methods The composite was prepared through impregnation-drying-heat treatment route with Y2O3-Al2O3 sols of high solid content as precursor and low-cost 3D carbon fiber needled felt as reinforcement. The composition and microstructure of the ablated sample were characterized with XRD and SEM, respectively. Results The linear and mass ablation rate of C/YAG composites were 0.05 g/s and 0.12 mm/s, respectively. Conclusion The high linear and mass ablation rate of C/YAG composites are mainly ascribed to the powerful shearing scouring of oxyacetylene torch in high heat flux. The microstructure of the ablated sample can be divided into three regions which are center region, transition region and border region. Thermo-chemical erosion and mechanical erosion are the main ablation behaviors in the center region; while thermo-chemical erosion and thermo-physical erosion are the main ablation behaviors in the transition region and the border region. |
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