Effect of SiC whiskers on the mechanical and ablation performances of Cu modified C/C composite
| Autor: | Jiwei Zhou, Jian Yin, Zhenhua Hao, Pei Wang, Hongbo Zhang, Fengchun Wei |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Process Chemistry and Technology Whiskers Composite number Alloy Chemical vapor deposition engineering.material Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Flexural strength Whisker Specific surface area Materials Chemistry Ceramics and Composites engineering Composite material |
| Zdroj: | Ceramics International. 48:5369-5376 |
| ISSN: | 0272-8842 |
| Popis: | To attain a novel ablation-resistant composite for ultra-high temperature structure application, SiC whiskers reinforced C/C–Cu (C/C–SiCW–Cu) composite was fabricated via chemical vapor deposition and infiltration technologies. Microstructure, mechanical and anti-ablation performances of C/C–SiCW–Cu composite were investigated and compared with those of C/C–SiC–Cu composite. The results show C/C–SiCW–Cu composite has significant advantages in compactness, flexural strength and ablation resistance. Because SiC whisker has a high specific surface area, C/C–SiCW–Cu composite has higher capillary force than C/C–SiC–Cu composite for the infiltration of Cu alloy. Meanwhile, the reinforcement of SiC whisker retards the SiC/Cu interfacial debonding during fracture failure process. Schematic models were built to clarify the structural evolution of ablated surface during oxyacetylene ablation tests, and anti-ablation process of C/C–SiCW–Cu composite can be described: forming a compact SiO2 layer, SiC whiskers pinning anti-ablation layer and Cu alloy transpiration cooling effect. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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