碳纤维/环氧树脂复合材料表面激光选择性消融预处理  

Pretreatment of Carbon Fiber Reinforced Epoxy Resin Composites by Laser Selective Ablation

作　　者：李长青[1] 许艺[1] 任攀[1] 周雷[1] 

机构地区：[1]装甲兵工程学院装备维修与再制造工程系,北京100072

出　　处：《中国表面工程》2016年第1期118-124,共7页China Surface Engineering

摘　　要：补片修复方法已经成为复合材料表面损伤修复的主要手段,补片与待修表面的粘接性能是影响修复效果的主要因素,表面预处理则是提高粘接修复强度的重要途径。采用Nd∶YAG激光器,对碳纤维/环氧树脂复合材料表面进行选择性激光消融处理,测试了补片粘接后的拉剪性能,分别采用电子显微镜、三维形貌仪、X射线光电子能谱分析仪、拉曼光谱仪,分析了激光消融表面的显微形貌和物相特征。结果表明,激光消融能够在不破坏碳纤维结构的情况下有效消除复合材料表面的环氧树脂,提升表面活性及粘接修复性能。与未进行激光消融处理的复合材料相比,激光处理后表面活性提高,含氧官能团C=O数量增加约87%,补片粘接修补后的拉剪强度最大提升了近36%。Patch repair method has been mainly used on surface repair of composites,and the bonding property between the patch and the damaged surface is the major factor that affects the repair effect.Surface pretreatment is an important way of enhancing the bonding strength.Nd∶YAG laser machine was used for selective ablation pretreatment of carbon fiber reinforced epoxy resin composites.Microscope morphology,physical and chemical properties and mechanical properties of the composites were analyzed with scanning electron microscopy（SEM）,3Dprofiler,X-ray photoelectron spectroscopy（XPS）and Raman spectrometer respectively.The results show that the epoxy resin can be removed effectively and the structure of the carbon fiber unwounded,the surface active property and the bonding performance promoted,the number of C=O group increased by approximately 87% and the adhesive tensile-shear strength upgraded about 36%.

关 键 词：激光消融 碳纤维 环氧树脂 力学性能 表面形貌 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TB332[金属学及工艺—金属学]