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    袁辉, 温卫东, 崔海涛, 徐颖. 沥青基碳/碳复合材料的弯曲性能[J]. 机械工程材料, 2009, 33(8): 65-68.
    引用本文: 袁辉, 温卫东, 崔海涛, 徐颖. 沥青基碳/碳复合材料的弯曲性能[J]. 机械工程材料, 2009, 33(8): 65-68.
    shu
    YUAN Hui, WEN Wei-dong, CUI Hai-tao, XU Ying. Flexural Properties of Pitch-based Carbon/Carbon Composites[J]. Materials and Mechanical Engineering, 2009, 33(8): 65-68.
    Citation: YUAN Hui, WEN Wei-dong, CUI Hai-tao, XU Ying. Flexural Properties of Pitch-based Carbon/Carbon Composites[J]. Materials and Mechanical Engineering, 2009, 33(8): 65-68.
    shu

    沥青基碳/碳复合材料的弯曲性能

    Flexural Properties of Pitch-based Carbon/Carbon Composites

      摘要
    • 摘要: 采用三点弯曲法测试了单向和三维四向碳纤维增强的两种沥青基碳/碳(C/C)复合材料(1D-C/C和3D-C/C)在室温及1 800 ℃高温时的弯曲性能,分析了增强体结构、温度对C/C复合材料弯曲性能的影响,并探讨了其弯曲断裂时的界面机制.结果表明:3D-C/C的弯曲模量高于1D-C/C的,但其抗弯强度却明显低于1D-C/C的;1D-C/C的弯曲断裂呈脆性断裂,而3D-C/C的弯曲断裂则表现出明显的假塑性特征;对同一种增强体结构的沥青基C/C复合材料,在1 800 ℃时的弯曲性能高于其在室温时的.

       

      Abstract: Flexural properties of unidirectional carbon fiber reinforced pitch-based carbon/carbon (C/C) composites (1D-C/C) and 3D(dimension) & 4D (direction) braided carbon fiber reinforced pitch-based C/C composites (3D-C/C) were tested by three-point bending beams at room temperature and 1 800 ℃ respectively.Effects of reinforcement structures and temperatures on flexural properties of the pitch-based C/C composites were analyzed,and the interface mechanisms in flexural failures was discussed.The results show that the flexural modulus of 3D-C/C was higher than that of 1D-C/C,while the flexural strength of 3D-C/C was lower than that of 1D-C/C obviously.The flexural failure of 1D-C/C was brittle,but that of 3D-C/C was pseudoplastic.Flexural properties of the pitch-based C/C composites at 1 800 ℃ were more excellent than those of the pitch-based C/C composites at room temperature.

       

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