航空航天结构复合材料湿热老化机理的研究  

Study on Hygrothermal Ageing Mechanisms of Aerospace Structural Composites

作　　者：过梅丽[1] 肇研[1] 谢令[2] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100083 [2]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2002年第4期51-54,共4页Aerospace Materials & Technology

摘　　要：通过研究T30 0 / 5 40 5和T30 0 /NY92 0 0复合材料以及基体树脂 5 40 5和NY92 0 0的浇注料在 80℃水浸中的吸水动力学、红外光谱、动态力学性能和表面形态的变化 ,分析了复合材料的湿热老化机理。结果表明 :在 80℃水浸的加速湿热老化条件下 ,两种复合材料的老化机理主要是吸入水分对基体的塑化 /溶胀作用以及因树脂与纤维湿膨胀的不匹配所产生的内应力引起的微观开裂。The hygrothermal ageing mechanisms of two types of composites, T300/bismaleimide 5405 and T300/epoxy NY9200, were analyzed by investigating the changes in water absorption kinetics, IR spectrums, dynamic mechanical properties and surface appearance of the two composites and the matrix resins used in them during water immersion at 80℃. Results show that under water immersion at 80℃, the main ageing mechanisms of those composites are plasticization effect of water absorbed on the matrix and micro cracking due to the stress resulting from the mismatch of the moisture expansions between the matrix and carbon fibers.

关 键 词：航空航天结构 复合材料 湿热老化处理 塑化效应 微观开裂 老化寿命 

分 类 号：V215.5[航空宇航科学与技术—航空宇航推进理论与工程]