| 魏玺,李捷文,张伟刚.HfB2-HfC-SiC 改性 C/C 复合材料的超高温烧蚀性能研究[J].装备环境工程,2016,13(3):12-17. WEI Xi,LI Jie-wen,ZHANG Wei-gang.Ablation Behaviors of HfB2-HfC-SiC Ceramic Modified C/C Composites at Ultra-high Temperature[J].Equipment Environmental Engineering,2016,13(3):12-17. |
| HfB2-HfC-SiC 改性 C/C 复合材料的超高温烧蚀性能研究 |
| Ablation Behaviors of HfB2-HfC-SiC Ceramic Modified C/C Composites at Ultra-high Temperature |
| 投稿时间：2016-01-28 修订日期：2016-06-15 |
| DOI：10.7643/ issn.1672-9242.2016.03.002 |
| 中文关键词: C/C 复合材料 基体改性 HfB2 HfC 烧蚀性能 |
| 英文关键词:C/C composites matrix modification HfB2 HfC ablation performance |
| 基金项目:国家自然科学基金（51272251， 51402300） |
|
|
| Author | Institution |
| WEI Xi | State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| LI Jie-wen | State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| ZHANG Wei-gang | State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 制备 HfB2-HfC-SiC 复相陶瓷改性 C/C 复合材料，并探究该材料的超高温烧蚀性能。方法 采用化学气相渗透结合前驱体浸渍热解工艺制备 HfC-SiC 复相陶瓷改性 C/C 复合材料（C/C-HfC-SiC）和HfB2-HfC-SiC 复相陶瓷改性 C/C 复合材料（C/C-HfB2-HfC-SiC），采用大气等离子烧蚀实验研究材料的超高温烧蚀性能。结果 C/C-HfC-SiC 和 C/C-HfB2-HfC-SiC 复合材料 2200 ℃线烧蚀率分别为 1.54×10-3，1.38×10-3 mm/s。 结论 复合材料具有独特的微结构特征，亚微米级的 HfB2和 HfC 基体均匀弥散分布在SiC 基体中。复合材料表面原位生成的液相 SiO2 和固相 HfO2复合氧化物膜，既可以抵抗高速气流的冲蚀，又可以抵抗氧化性气氛的向内扩散，是复合材料具有优异超高温抗烧蚀性能的主要原因。 |
| 英文摘要: |
| Objective To fabricate HfB2-HfC-SiC ceramic modified C/C composites and investigate the ablation performance of the composites at ultra-high temperature. Methods Chemical vapor infiltration (CVI) combined with precursor impregnation & pyrolysis (PIP) method were used to fabricate HfC-SiC ceramic modified C/C composites(C/C-HfC-SiC) and HfB2-HfC-SiC ceramic modified C/C composites(C/C-HfB2-HfC-SiC). Atmospheric plasma torch was used to investigate the ablation performance of the composites. Results Linear ablation rates of C/C-HfC-SiC and C/C-HfB2-HfC-SiC composites at 2200 ℃ were 1.54×10-3 mm/s and 1.38×10-3 mm/s respectively. Conclusion The composites had unique microstructural features, with nano-sized HfB2 and HfC particles uniformly distributed in SiC phase. The liquid-phase SiO2 and the solid-phase HfO2 composite oxides film in situ formed on the surface of the composites could resist not only the erosion of high-speed gas flow, but also the inward diffusion of oxidative gases, which was the main cause for the excellent ablation resistance of the composites at ultra-high temperature. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
