低温用碳/ 环氧复合材料性能
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航天材料及工艺研究所,北京 100076

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TB332

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Properties of C/ E Composites for Cryogenic Application
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    摘要:

    针对复合材料在液氮温度下的应用需求ꎬ采用RTM 工艺制备了几种碳/ 环氧复合材料ꎬ评价了这几
    种复合材料在80℃、室温和-196℃下的弯曲、压缩、层剪、冲击性能和室温下的GⅠC、GⅡCꎮ 结果显示:随着测试温度
    的降低ꎬ复合材料的弯曲强度、压缩强度、冲击强度明显提高ꎻ而低温对复合材料模量的影响较小ꎮ 树脂基体的韧
    性对复合材料的强度、模量等性能影响不大ꎬ而碳纤维种类对复合材料的强度和模量影响较大ꎮ 树脂基体韧性和
    碳纤维种类均不改变复合材料力学性能随测试温度变化的趋势ꎮ 树脂基体韧性和碳纤维种类均会影响复合材料
    的层间断裂韧性ꎬ其中高韧性树脂基体可更加明显地提高复合材料的层间断裂韧性ꎻM40 级经编织物/ R608-2 复
    合材料GⅠC高达868 J/ m2、GⅡC高达2 750 J/ m2ꎬ但采用高韧性基体的复合材料Tg 会有所降低ꎮ

    Abstract:

    For the application demand of composites under liquid N2 temperatureꎬ several carbon fabric/ epoxy
    composites have been prepared by RTM process.The flexural propertiesꎬ compression strengthꎬ interlamniar shear
    strengthꎬ and impact strength at 80℃ꎬRT and -196℃ have been tested.GⅠC and GⅡC at RT have also been tested.
    Compared with room temperatureꎬ the flexural strengthꎬ compression strength and impact strength of M40 ̄level braid ̄
    ing fabric/ R608-1 composites under -196℃ obviously increasedꎬ while the effect of cryogenic temperature on the
    modulus of composites was small. The effects of resin toughness on the strength and modulus of composites were smallꎬ
    while the effects of carbon fiber on the strength and modulus of composites were large. In any caseꎬ toughness of resin
    matrix and variety of carbon fabric could not change the trend of mechanical properties vs temperature. Besidesꎬ both
    toughness of resin matrix and variety of carbon fabric could affect the interlaminar fracture toughness of composites.
    And high ̄toughness resin matrix could improve the interlaminar fracture toughness more obviously. The GⅠC and GⅡC
    of M40 ̄level braiding fabric/ R608-2 composites was as high as 868 J/ m2 and 2 750 J/ m2ꎬrespectively. Howeverꎬ the
    Tg of composites with high ̄toughness resin matrix was relatively low.

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史汉桥 唐占文 孙建波 崔 超 孙宝岗.低温用碳/ 环氧复合材料性能[J].宇航材料工艺,2016,46(4).

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  • 在线发布日期: 2016-11-28
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