| 碳化铪含量对C/C复合材料喉衬烧蚀性能的影响 |
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| 引用本文： | 李淑萍,李克智,杜红英,张守阳,沈学涛.碳化铪含量对C/C复合材料喉衬烧蚀性能的影响[J].新型炭材料,2012,27(4):311-314. |
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| 作者姓名： | 李淑萍 李克智 杜红英 张守阳 沈学涛 |
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| 作者单位： | 1. 西北工业大学材料学院,陕西西安,710072
2. 晋西机器工业集团有限责任公司产品设计研究所,山西太原,030027 |
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| 基金项目： | 高等学校学科创新引智计划项目，国家重点基础研究发展规划 |
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| 摘 要： | 将炭毡浸渍于饱和的HfOCl2.8H2O乙醇溶液中,经600℃热处理形成HfO2/C复合材料,然后采用热梯度化学气相沉积工艺在2100℃进行致密化和石墨化处理使HfO2转化为HfC而得到碳化铪(HfC)改性、整体炭毡增强的炭/炭(HfC-C/C)复合材料整体喉衬。利用小型固体火箭发动机试车台装置,在7MPa、3200℃烧蚀3s以测定HfC含量对喉衬烧蚀性能的影响。结果表明,HfC质量分数为5.7%的HfC-C/C喉衬线烧蚀率减小了25.2%;HfC质量分数为8.7%的HfC-C/C喉衬线烧蚀率减小了49.6%。同时,当HfC质量分数为5.7%时,HfC-C/C喉衬出现了以恒定线烧蚀率为特征的稳态烧蚀阶段,且该阶段的持续时间随HfC含量的增加而增加。
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| 关 键 词： | HfC C/C复合材料 固体火箭发动机 烧蚀特性 |
Effect of hafnium carbide content on the ablative performance of carbon/carbon composites as rocket throats |
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| LI Shu-ping
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LI Ke-zhi
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DU Hong-ying
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ZHANG Shou-yan
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SHEN Xue-tao.Effect of hafnium carbide content on the ablative performance of carbon/carbon composites as rocket throats[J].New Carbon Materials,2012,27(4):311-314. |
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| Authors: | LI Shu-ping LI Ke-zhi DU Hong-ying ZHANG Shou-yan SHEN Xue-tao |
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| Affiliation: | 1(1.School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China;(2.Institute of Product Design,Jinxi Machinery Industries Group Corporation,Taiyuan 030027,China) |
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| Abstract: | Hafnium carbide(HfC) modified carbon/carbon(HfC-C/C) composites were prepared by impregnating carbon felts with a saturated HfOCl2 · 8H2O ethanol solution and heat treating at 600 ℃ to form HfO2/C composites that were then densified with pyrocarbon by chemical vapor infiltration and graphitized at 2 100 ℃ to convert HfO2 into HfC.The HfC-C/C composites as rocket throats were ablated at 7 MPa and around 3 200 ℃ for 3 s by an experimental solid rocket motor.Results showed that the HfC-C/C composites with HfC contents more than 5.7 mass% had a stable period with a constant ablation rate and the duration of this period increased with HfC content.The overall ablation rate was decreased by 25.2 and 49.6% for the composites having 5.7 and 8.7 mass% HfC respectively as compared with the composite with 2.5 mass% HfC. |
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| Keywords: | Carbon/carbon composites Solid rocket motor Hafnium carbide Ablation performances |
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