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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。
Aiming at the problem of low bonding strength between glass fiber / epoxy composite and coating, based on the principle of mechanical interlocking between composite material and coating and the traditional electroless plating process of plastic substrate, it is proposed that by adding the bridging effect of particles, Transition layer to strengthen the coating interface composite metal metallization method. Tensile test was used to measure the bonding strength of the metalized glass fiber / epoxy composite specimen. The strengthening mechanism of the reinforcing particles on the interface of the coating was analyzed by the microscopic observation of the cross section and the cross section. At the same time, The influence of surface roughness and particle size fraction of glass fiber / epoxy composites on the bonding strength of coatings containing transitional layer. The results show that the interfacial strength of the coating can be significantly improved by using the above metallization method. Compared with the conventional metallization process, the bonding strength of the glass fiber / epoxy composite with different surface roughness increases by 161% ; At the same time, the bonding strength of the coating tends to increase first and then decrease with the increase of the mass fraction of the reinforced particles. When the mass fraction of the reinforced particles is 50%, the bonding strength of the coating reaches the maximum.