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| Preparation and Ablation Behavior of C/C-SiC-ZrC Composite by Novel Polyzirconocenecarbosilane |
| Received:January 11, 2019 Revised:February 19, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.10.006 |
| KeyWord:polyzirconocenecarbosilane (PZCS) precursor infiltration and pyrolysis (PIP) C/C-SiC-ZrC composites ablation property |
| Author | Institution |
| ZHU Shi-bu |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| MENG Xiang-li |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| ZHANG Qiang |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| ZHU Yang |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| YANG Xing |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| YAN Lian-sheng |
Xi′an Aerospace composites Research Institute, Xi′an , China |
| ZHANG Xiao-hu |
Xi′an Aerospace composites Research Institute, Xi′an , China |
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| Abstract: |
| Objective To improve the ablation property of C/C-SiC composites. Methods The novel polyzirconocenecarbosilane (PZCS) precursor was pyrolyzed through cross-linked and carbonization procedure. The structure, cross-linked, crystalline structure and element distribution of pyrolyzed ceramic of PZCS precursor were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetry (TG), X-ray diffraction (XRD) and scanning electron microscope (SEM). C/C-SiC-ZrC composite was prepared by precursor infiltration and pyrolysis with PZCS as a precursor. The ablation resistance property was characterized through oxyacetylene ablation test. Results It was obvious that the ceramic yield of PZCS precursor was improved after cross-lined and carbonization process. The TG result showed that the ceramic yield at 980 ℃ was about 66.37%, and the received ceramic was well-distributed ZrC-SiC multi-phase ceramic. After the C/C-SiC-ZrC composite was ablated by oxyacetylene flame for 600 s, its linear ablation was 0.0067 mm/s, showing very good anti-ablation performance. Conclusion The formation of ZrO2 and SiO2 layer during the ablation of SiC-ZrC multiphase ceramic matrix acted as an effective oxygen and heat barrier, preventing oxygen and heat from diffusing into composite, which could enhance its ablation property efficiently. |
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