镀液中SiC含量和粒径对Ni-P-SiC复合化学镀层性能的影响

采用化学镀方法制备了Ni P SiC复合镀层 ,系统研究了镀液中SiC含量和粒径对镀层结构及显微硬度的影响。结果表明 ,镀层中SiC析出量随镀液中SiC含量的增加而增加 ,在SiC含量一定的情况下 ,当SiC粒径为 7.0 μm时 ,析出量最大 ;镀液中SiC的含量和粒度对原始镀层的硬度影响不大 ,但对 4 0 0℃热处理后的镀层硬度有显著影响

Effect of Concentration and Size of SiC Particle on the Properties of Ni-P-SiC Electroless Plated Composite Coats

Effect of concentration and size of SiC particle in plating bath on the structure and hardness of electroless Ni P SiC plated composite coats was systematically studied.The test results showed that the precipitating amount of SiC in the composite coats increases with concentration of SiC in the plating bath and reaches the maximum at the size of SiC about 7.0μm when the concentratin is certain. The concentration and particle size of SiC in the plating bath have little effect on the hardness of as received composite coats, but they obviously affect the hardness of the composite coats heat treated at 400℃.