Sandwich-structured C/C-SiC composites fabricated by electromagnetic-coupling chemical vapor infiltration
文献类型：期刊论文
| 作者 | Hu, Chenglong; Hong, Wenhu; Xu, Xiaojing; Tang, Sufang; Du, Shanyi; Cheng, Hui-Ming; Tang, SF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China. |
| 刊名 | NATURE PUBLISHING GROUP
 |
| 出版日期 | 2017-10-13 |
| 卷号 | 7页码:- |
| ISSN号 | 2045-2322 |
| 英文摘要 | Carbon fiber (CF) reinforced carbon-silicon carbide (C/C-SiC) composites are one of the most promising lightweight materials for re-entry thermal protection, rocket nozzles and brake discs applications. In this paper, a novel sandwich-structured C/C-SiC composite, containing two exterior C/SiC layers, two gradient C/C-SiC layers and a C/C core, has been designed and fabricated by two-step electromagnetic-coupling chemical vapor infiltration (E-CVI) for a 20-hour deposition time. The cross-section morphologies, interface microstructures and SiC-matrix growth characteristics and compositions of the composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), respectively. Microstructure characterization indicates that the SiC growth includes an initial amorphous SiC zone, a gradual crystallization of SiC and grow-up of nano-crystal, and a columnar grain region. The sandwich structure, rapid deposition rate and growth characteristics are attributed to the formation of thermal gradient and the establishment of electromagnetic field in the E-CVI process. The composite possesses low density of 1.84 g/cm(3), high flexural strength of 325 MPa, and low linear ablation rate of 0.38 mu m/s under exposure to 5-cycle oxyacetylene flame for 1000 s at similar to 1700 degrees C.; Carbon fiber (CF) reinforced carbon-silicon carbide (C/C-SiC) composites are one of the most promising lightweight materials for re-entry thermal protection, rocket nozzles and brake discs applications. In this paper, a novel sandwich-structured C/C-SiC composite, containing two exterior C/SiC layers, two gradient C/C-SiC layers and a C/C core, has been designed and fabricated by two-step electromagnetic-coupling chemical vapor infiltration (E-CVI) for a 20-hour deposition time. The cross-section morphologies, interface microstructures and SiC-matrix growth characteristics and compositions of the composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), respectively. Microstructure characterization indicates that the SiC growth includes an initial amorphous SiC zone, a gradual crystallization of SiC and grow-up of nano-crystal, and a columnar grain region. The sandwich structure, rapid deposition rate and growth characteristics are attributed to the formation of thermal gradient and the establishment of electromagnetic field in the E-CVI process. The composite possesses low density of 1.84 g/cm(3), high flexural strength of 325 MPa, and low linear ablation rate of 0.38 mu m/s under exposure to 5-cycle oxyacetylene flame for 1000 s at similar to 1700 degrees C. |
| 学科主题 | Multidisciplinary Sciences |
| 语种 | 英语 |
| 资助机构 | Major Program of Aerospace Advanced Manufacturing Technology Research Foundation of NSFC; CASC, China [U1537204]; Youth Innovation Promotion Association of Chinese Academy of Sciences [2014171] |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79046]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Tang, SF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Hu, Chenglong,Hong, Wenhu,Xu, Xiaojing,et al. Sandwich-structured C/C-SiC composites fabricated by electromagnetic-coupling chemical vapor infiltration[J]. NATURE PUBLISHING GROUP,2017,7:-. |
| APA | Hu, Chenglong.,Hong, Wenhu.,Xu, Xiaojing.,Tang, Sufang.,Du, Shanyi.,...&Tang, SF .(2017).Sandwich-structured C/C-SiC composites fabricated by electromagnetic-coupling chemical vapor infiltration.NATURE PUBLISHING GROUP,7,-. |
| MLA | Hu, Chenglong,et al."Sandwich-structured C/C-SiC composites fabricated by electromagnetic-coupling chemical vapor infiltration".NATURE PUBLISHING GROUP 7(2017):-. |
入库方式： OAI收割
来源：金属研究所
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