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| 掺杂难熔金属碳化物对炭/炭复合材料烧蚀机理的影响 | |
| 引用本文： | 王俊山,李仲平,敖明,许正辉,刘朗,胡子君,彭维周. 掺杂难熔金属碳化物对炭/炭复合材料烧蚀机理的影响[J]. 新型炭材料, 2006, 21(1): 9-13 |
| 作者姓名： | 王俊山 李仲平 敖明 许正辉 刘朗 胡子君 彭维周 |
| 作者单位： | 1. 中国科学院炭材料重点实验室,中国科学院山西煤炭化学研究所,山西,太原,030001;中国科学院研究生院,北京,100039;航天材料及工艺研究所,先进功能复合材料技术国防科技重点实验室,北京,100076 2. 航天材料及工艺研究所,先进功能复合材料技术国防科技重点实验室,北京,100076 3. 中国科学院炭材料重点实验室,中国科学院山西煤炭化学研究所,山西,太原,030001 |
| 摘 要： | 通过对炭／炭复合材料（C／C）和添加难熔金属碳化物炭／炭复合材料（C／C＋MC）的微观结构对比分析，研究了二者在电弧加热器上的烧蚀机理。结果表明，难熔金属化合物（MC）在烧蚀过程中进入到距表层几个微米之内的纤维和基体炭微晶内，明显影响了相邻微晶的形貌。MC的存在，一方面，加大了机械剥蚀等力学因素引起的质量损失，增大了试样表面粗糙度，从而进一步加重了烧蚀；另一方面，MC具有降低碳的升华总量的效应。从综合效应来看，C／C＋MC复合材料的烧蚀速率比C／C复合材料高。 |
| 关 键 词： | 炭/炭复合材料 烧蚀机理 微观结构 |
| 文章编号： | 1007-8827（2006）01-009-05 |
| 收稿时间： | 2006-01-15 |
| 修稿时间： | 2006-01-152006-03-05 |
Effect of doped refractory metal carbides on the ablation mechanism of carbon/carbon composites |
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| WANG Jun-shan,LI Zhong-ping,AO Ming,XU Zheng-hui,LIU Lang,HU Zi-jun,PENG Wei-zhou. Effect of doped refractory metal carbides on the ablation mechanism of carbon/carbon composites[J]. New Carbon Materials, 2006, 21(1): 9-13 | |
| Authors: | WANG Jun-shan LI Zhong-ping AO Ming XU Zheng-hui LIU Lang HU Zi-jun PENG Wei-zhou |
| Affiliation: | 1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China; 2. Graduate School of the Chinese Academy of Sciences, Bering, 100039, China; 3. National Key Laboratory of Advanced Functional Composite Materials, Aermpace Research Insti tute of Materials and Processing Technology, Beijing , 100076, China |
| Abstract: | The microstructures of carbon/carbon composites (C/C) and refractory metal carbide-doped carbon/carbon composites (C/C+MC) were compared to elucidate their ablation mechanism in an arc jet heater. It was found that refractory metal carbides (MC) entered the crystallites of the composites to a depth of several microns from the ablated surface and obviously influenced the texture around them. The existence of MC aggravated not only the weight loss caused by mechanical peeling off but also the surface roughness of the samples. As a result, the ablation speed of C/C+MC was higher than that of C/C although MC decreased the total quantity of sublimed carbon. |
| Keywords: | C/C composite Ablation mechanism Microstructure |
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