| 引用本文: | 王松,陈朝辉,李钒,等.T300和JC2#纤维增强C/SiC复合材料力学性能对比.[J].国防科技大学学报,2006,28(1):23-27.[点击复制] |
| WANG Song,CHEN Zhaohui,LI Fan,et al.Comparison of Mechanical Properties of C/SiC Composites Reinforced by T300 and JC2# Carbon Fibers[J].Journal of National University of Defense Technology,2006,28(1):23-27[点击复制] |
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| T300和JC2#纤维增强C/SiC复合材料力学性能对比 |
| 王松, 陈朝辉, 李钒, 马青松 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 以聚碳硅烷(PCS)为先驱体，采用聚合物浸渍裂解法(PIP)分别制备得到T300碳纤维和JC2#碳纤维增强C/SiC复合材料。JC2# C/SiC复合材料具有优异的力学性能，抗弯强度和断裂韧性分别达到662MPa和19.5MPa?m1/2；T300 C/SiC复合材料表现出低强度、高脆性，其抗弯强度和断裂韧性不足前者的四分之一。T300 C/SiC复合材料低性能的根本原因在于T300纤维在PCS裂解过程中性能严重下降，复合材料中纤维与基体间存在强界面结合是另一个影响因素。 |
| 关键词: C/SiC复合材料 力学性能 聚合物浸渍裂解 |
| DOI： |
| 投稿日期：2005-05-26 |
| 基金项目:国家部委基金资助项目(51488030105ZS9504) |
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| Comparison of Mechanical Properties of C/SiC Composites Reinforced by T300 and JC2# Carbon Fibers |
| WANG Song, CHEN Zhaohui, LI Fan, MA Qingsong |
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(College of Aerospace and Materials Engineering,National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Two C/SiC composits reinforced respectively by T300 and JC2# carbon fibers were fabricated by means of polymer infiltration and pyrolysis (PIP) with polycarbosilane (PCS) as precursor. The composite reinforced by JC2# fiber had perfect mechanical properties, displaying flexural strength of 662MPa and fracture toughness of 19.5MPa. m1/2, whereas T300 C/SiC composite had low strength and high brittleness, with its flexural strength and fracture toughness were less than one fourth of those of JC2# C/SiC composite. It was found that the fundamental factor to the poor mechanical properties of T300 C/SiC composite was the severe degradation of the fiber during PCS pyrolysis; the other important one was attributed to the strong interfacial bonding between the fiber and agent in the composite. |
| Keywords: C/SiC composites mechanical properties PIP |
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