国产T700级碳纤维增强双马树脂基复合材料的力学性能

采用扫描电子显微镜(SEM)、反气相色谱(IGC)和X射线光电子能谱仪(XPS)对国产T700级碳纤维和东丽T700S碳纤维的表面形貌、表面能和表面化学特性进行表征,测试两种碳纤维增强双马树脂基复合材料的力学性能,考察国产碳纤维复合材料的界面黏结性能、韧性和湿热性能。结果表明:碳纤维表面特性(表面形貌、表面能和表面化学组成等)对复合材料界面黏结性能具有显著影响;国产T700级碳纤维/QY9611复合材料在室温下的界面黏结性能优于T700S/QY9611复合材料;国产T700级碳纤维/QY9611复合材料的韧性优异,冲击后压缩强度达到了国外先进复合材料IM7/5250-4的水平;经湿热处理后的层间剪切强度仍与T700S/QY9611复合材料相当,说明国产T700级碳纤维/QY9611复合材料具备良好的湿热性能。

Mechanical Properties of Domestic T700 Grade Carbon Fibers/QY9611 BMI Matrix Composites

The morphologies,surface energies and surface chemical properties of the domestic T700 grade carbon fiber and the T700S carbon fiber were characterized by using scanning electronic microscopy (SEM),inverse gas chromatography(IGC) and X-ray photoelectron spectroscopy (XPS)respectively.The mechanical properties of the two carbon fibers/QY9611 composites were also discussed.The results indicate that the surface properties of carbon fibers have an important influence on the interfacial properties of composites.The interfacial properties of domestic T700 grade carbon fibers/QY9611 composite at room temperature/dry conditions are superior to T700S/QY9611 composite.The toughness of domestic T700 grade carbon fibers/QY9611composite is outstanding as well.The value of CAI has reached the level of foreign advanced composite IM7/5250-4.After hydrothermal treatment,the interfacial strength of domestic T700 grade carbon fibers/QY9611 composite is equal to that of T700S/QY9611 composite.It shows that domestic T700 grade carbon fibers/QY9611 composite has good hydrothermal-resistant properties.