| 热处理对3D C/C复合材料断裂行为的影响 |
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| 引用本文： | 张明瑜,李建立,苏哲安,陈建勋,黄 东,殷 腾.热处理对3D C/C复合材料断裂行为的影响[J].湖南工业大学学报,2011,25(1):1-5. |
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| 作者姓名： | 张明瑜 李建立 苏哲安 陈建勋 黄 东 殷 腾 |
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| 作者单位： | 1. 中南大学,粉末冶金国家重点实验室,湖南,长沙,410083
2. 中南大学,机电工程学院,湖南,长沙,410083 |
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| 基金项目： | 国家自然科学基金资助项目（50802115）,国家973计划基金资助项目（2011CB605801） |
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| 摘 要： | 采用3D炭纤维预制体,以丙烯作为碳源,氮气作为载气,利用自制的快速CVI炉制备了C/C复合材料。详细分析了不同CVI工艺下,热处理对C/C复合材料断裂强度、断裂方式以及材料均匀性的影响。力学性能测试结果表明,材料的弯曲断裂特征与制备过程中受到的高温热处理次数有关。与1次连续CVI工艺相比,多阶段连续CVI工艺下,C/C复合材料经过2次"CVI-热处理"循环工艺后,其密度达1.8 g/cm3,抗弯强度达196.69 MPa,断裂方式为假塑性断裂,材料在Weibull概率分布下强度分散性较小。
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| 关 键 词： | 炭/炭复合材料 热处理 断裂 Weibull分布 |
| 收稿时间： | 2010/12/10 0:00:00 |
Effect of Heat-Treatment on Fracture Characteristics of 3D C/C Composites |
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| Zhang Mingyu,Li Jianli,Su Zhean,Chen Jianxun,Huang Dong and Yin Teng.Effect of Heat-Treatment on Fracture Characteristics of 3D C/C Composites[J].Journal of Hnnnan University of Technology,2011,25(1):1-5. |
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| Authors: | Zhang Mingyu Li Jianli Su Zhean Chen Jianxun Huang Dong and Yin Teng |
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| Affiliation: | State Key Laboratory of Powder Metallurgy, Central South University;State Key Laboratory of Powder Metallurgy, Central South University;State Key Laboratory of Powder Metallurgy, Central South University;State Key Laboratory of Powder Metallurgy, Central South University;State Key Laboratory of Powder Metallurgy, Central South University;College of Mechanical and Electrical Engineering, Central South University |
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| Abstract: | Using 3D carbon fibre preform, with C3H6 as the carbon source and N2 as the carrier gas, C/C composites are fabricated by the fast CVI process. The effects of heat-treatment on flexural strength, fracture ways and the uniformity of C/C composites are analyzed under different CVI processes. The experimental results indicate that the fracture characteristics of composites are closely related to the times of heat-treatment during CVI process. Compared with a continuous CVI, C/C composites show a pseudo-plastic fracture with the destiny 1.8 g/cm3 and flexural strength 196.69 MPa after two "CVI-heat treatment" circulation under multi-stage CVI process, and the uniformity of materials is well by Weibull distribution. |
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| Keywords: | C/C composites heat-treatment fracture Weibull distribution |
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