致密化工艺对针刺无纬布C/ C 复合材料性能的影响
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西安航天复合材料研究所

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TB3

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Effect of Densification Methods on Properties of Needled Felt WithNon鄄Woven Cloth Reinforced C/ C Composites
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    摘要:

    比较了两种不同工艺制备的针刺无纬布C/ C 复合材料。研究表明,在沥青浸渍/ 碳化之前对针
    刺预制体进行CVI 预增密处理后,其C/ C 复合材料轴向拉伸强度提高了234%,层剪强度提高了126%;热扩
    散率明显升高,轴向线胀系数下降,表现出良好的综合性能。

    Abstract:

    In this paper, two processes for preparing needled felt with non鄄woven cloth reinforced C/ C compos鄄
    ites are compared. Needled preforms are treated firstly with a CVI pre鄄densified process, and then the preforms are
    densified by pitch impregnation/ carbonization. The results show that the tensile strength in axial direction is increased
    by 234%, the interlaminar shear strength is increased by 126%. In addition , the thermal diffusivity is obviously in鄄
    creased, while the axial coefficient of thermal expansion( CTE) is decreased. It is concluded that the material has
    good comprehensive properties.

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郑蕊.致密化工艺对针刺无纬布C/ C 复合材料性能的影响[J].宇航材料工艺,2015,45(2).

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  • 在线发布日期: 2016-11-28
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