玻璃纤维/环氧树脂复合材料与镀层界面的Ni颗粒强化工艺

Process of glass fiber/epoxy composites and coating interface adhesion with Ni particle reinforcement

针对玻璃纤维/环氧树脂复合材料与镀层结合界面强度低的问题,基于复合材料/镀层间的机械互锁原理及传统塑料基体化学镀工艺,提出通过增强颗粒的桥接作用,增加含有增强颗粒的过渡层来强化镀层界面的复合材料金属化方法。对金属化后的玻璃纤维/环氧树脂复合材料试件采用拉伸试验法测量镀层的结合强度,并通过截面和断面的显微观测,分析了增强颗粒对于镀层界面的强化机制;同时获得了玻璃纤维/环氧树脂复合材料表面粗糙度和增强颗粒质量分数对含有过渡层的镀层结合强度的影响规律。结果表明:采用上述金属化方法可以显著提高镀层的界面强度,与传统的金属化工艺制备试件相比,玻璃纤维/环氧树脂复合材料在不同表面粗糙度下,镀层结合强度平均提高161%;同时,镀层的结合强度随着增强颗粒质量分数的增加,呈现先增大后减小的趋势,当增强颗粒的质量分数为50%时,镀层的结合强度达到最大。

A method of metalized composites is proposed to improve the adhesion strength between the glass fiber/epoxy composites and coating.This method was based on mechanical interlocks principles in composite/coating and traditional plastic matrix chemical plating process.An interlayer containing reinforced particles was added to enhance the coating interface through the reinforced particles’role of bridging.The tensile test method was used to measure the adhesion strength of coating of the metalized glass fiber/epoxy composite specimen.The microscope observations of the cross-section and fracture surface were investigated to analyze the strengthening mechanism of reinforced par-ticles on the coating interface.The influence rules of surface roughness of glass fiber/epoxy composites and rein-forced particles mass fraction on the adhesion strength of the coating containing an interlayer were obtained.The re-sults show that the improved metalized method can increase adhesion strength of coating by an average of 1 6 1% in comparison to the traditional metalized methods with different surface roughness.Moreover,the adhesion strength of coating rises at first and then falls with the increase of the mass fraction of reinforced particles.The adhesion strength of coating reaches the maximum when the mass fraction of reinforced particles is 50%.