室温和高温下三维针刺炭/炭复合材料的弯曲性能及破坏机理

李典森; 姚倩倩; 姜楠; 江雷

doi:10.1016/S1872-5805(16)60023-9

室温和高温下三维针刺炭/炭复合材料的弯曲性能及破坏机理

doi: 10.1016/S1872-5805(16)60023-9

李典森^1,2,,
姚倩倩¹,
姜楠³,
江雷¹

1.
北京航空航天大学化学与环境学院, 仿生智能界面科学与技术教育部重点实验室, 仿生能源材料与器件北京市重点实验室, 北京 100191;
2.
东华大学纤维材料改性国家重点实验室, 上海 201620;
3.
北京农学院国际学院, 北京 102206

基金项目: 国家自然科学基金（11272001，11522216）；爆炸科学与技术国家重点实验室基金（KFJJ15-21M）；工业装备结构分析国家重点实验室基金（GZ15213）；摩擦学国家重点实验室基金（SKLTKF14B14）；纤维材料改性国家重点实验室基金（LK0904）；高性能陶瓷和超微结构国家重点实验室基金（SKL201304SIC）；中央高校基本科研业务费专项基金（YWF-15-HHXY-004）.

详细信息

通讯作者:
李典森.E-mail:lidiansen@buaa.edu.cn;姜楠.E-mail:jiangnan@bua.edu.cn

中图分类号: TQ342⁺.74
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出版历程
- 收稿日期: 2016-06-02
- 录用日期: 2016-08-29
- 修回日期: 2016-07-29
- 刊出日期: 2016-08-28

Bend properties and failure mechanism of a carbon/carbon composite with a 3D needle-punched preform at room and high temperatures

1.
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices, School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China;
3.
International College, Beijing University of Agriculture, Beijing 102206, China

Funds: National Natural Science Foundation of China(11272001,11522216);Foundation of State Key Laboratory of Explosion Science and Technology(KFJJ15-21M);Foundation of State Key Laboratory of Structural Analysis for Industrial Equipment(GZ15213);Tribology Science Fund of State Key Laboratory of Tribology(SKLTKF14B14);Foundation of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University(LK0904);Foundation of State KeyLaboratory of High Performance Ceramics and Superfine Micro-structure(SKL201304SIC);Fundamental Research Funds for the Central Universities(YWF-15-HHXY-004).

摘要

摘要: 本文制备了高密度三维针刺炭/炭复合材料，研究了该材料在室温和高温下的弯曲性能，并从宏、细观角度研究了材料的变形与失效机理。结果表明，三维针刺炭/炭复合材料具有好的抗弯曲性能，400℃以下的载荷-挠度曲线呈线弹性和脆性破坏特征；而更高温度下的曲线表现出明显的韧性和塑性失效。由于氧化作用的加重，材料的弯曲性能随着温度的升高而显著减小。材料呈现锯齿状断裂特征，在500℃以下，主要的损伤形式表现为基体开裂，90°纤维/基体脱粘，0°纤维的局部扭曲和断裂；而在更高温度下，复合材料的氧化特征更加明显，纤维和基体间的界面粘结性能显著下降。
- 三维针刺炭/炭复合材料 /
- 高温 /
- 弯曲性能 /
- 失效机理
Abstract: A 3D needle-punched C/C composite with a high density was fabricated and its bend properties were investigated at room and high temperatures. Macro-fracture and SEM micrographs were examined to understand the deformation and failure mechanism. Results show that the load-deflection curves below 400℃ exhibit a linear elastic and brittle fracture failure, while the curves at temperatures above 500℃ show an obvious tough and plastic failure. The bend strength and modulus decrease significantly with increasing temperature due to severe carbon oxidation. Below 500℃, the main damage to the composite is in the form of matrix cracking, 90° fiber/matrix debonding, local twisting and fracture of the 0° fibers. Above 500℃, the oxidation of the composite is significant and the interfacial adhesion between fibers and matrix is decreased significantly.
- 3D needle-punched C/C composites /
- High temperature /
- Bending properties /
- Failure mechanism

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