玻璃纤维/环氧树脂复合材料表面金属化工艺研究

THE STUDY OF SURFACE METALLIZATION PROCESS OF FIBER GLASS/EPOXY COMPOSITE

提出一种在玻璃纤维/环氧树脂复合材料表面化学镀镍的简化工艺,首先在复合材料表面引入含有镀镍短纤维的过渡层,复合材料与过渡层共固化成型。通过机械粗化、酸化、化学镀工艺成功地在玻璃纤维/环氧树脂复合材料表面沉积一层连续致密的Ni-P镀层。采用超景深显微镜观察化学镀后镀层的表面形貌,并采用SEM对镀层截面特征进行观测。系统地研究了化学镀时间、装载量对镀层表面形貌、镀层厚度与镀层沉积速度的影响规律,并测量了复合材料/镍镀层界面结合强度。试验结果表明,当化学镀时间为8 h、装载量为1.25 dm2/L时,镀层厚度能达到38.96μm,镀层结合强度达到8.45 MPa。

A simple method of electroless plating on fiber glass/epoxy composite surface is proposed. A layer containing short fibers with nickel plating was coated on the composite surface. The composite and layer were co-cured in the same process condition. Experimental results show that a uniform nickel coating was successfully deposited on the fiber glass/epoxy composite substrate by electroless plating after appropriate mechanical roughening and acidification. A three dimensional surface profiler was adopted to measure the surface morphology and roughness of the composite after mechanical roughening. In addition,SEM and digital microscope with large depth-of-field were employed to observe the surface microstructure and cross-sectional micrograph of nickel coating. Effects of electroless plating time and loadage on the coating morphology,coating thickness and deposition rate were discussed. The tensile tests were performed to determine coating adhesion strength. Under the process conditions with coating time of 8h and loadage of 1. 25 dm～2/L,the experimental results indicate that the coating thickness and coating adhesion strength can reach 38.96 μm and 8. 45 MPa,respectively.