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针对CCF300/5428复合材料在循环湿热环境下的吸湿-脱湿行为和层间剪切性能进行了研究,并结合扫描电镜观察了循环湿热处理的不同阶段纤维/基体界面结合状态.研究结果表明:经过反复吸湿后,水分的初始扩散速率和饱和吸湿率增加;脱湿后水对复合材料层间剪切性能的影响大部分可以消除;复合材料吸湿后室温环境下性能下降较少,但在高温高湿环境下,复合材料的性能会显著降低.
The moisture absorption-dehumidification behavior and interlaminar shear behavior of CCF300 / 5428 composites under cycling hot and humid conditions were studied, and the bonding state of the fiber / matrix interface at different stages of cyclic wet heat treatment was observed by scanning electron microscopy.The results show that: After repeated moisture absorption, the initial diffusion rate of water and saturated moisture absorption rate increased; dewatering water on the shear properties of composite materials most of the impact can be eliminated; composite materials moisture absorption less room temperature environment less performance, but at high temperatures Under high humidity, the performance of the composite material will be significantly reduced.