利用化学镀方法制备了Ni-P-SiC(纳米)复合镀层,研究了镀液中纳米SiC微粒的含量对复合镀层组织与性能的影响,结果表明:由于纳米SiC的加入,使复合镀时的镀速加快,原因是液固界面增加,从而增加了有效催化面积.由于镀层中纳米SiC的存在,使复合镀层的硬度得到显著提高,镀态下硬度可达1000~1100HV,退火处理后则可达到1650HV.与微米SiC复合镀层相比,纳米复合镀层的耐磨性也有明显改善.用DSC分析了镀层的晶化规律,发现纳米复合镀层的晶化温度大幅度提高.

The Ni-P-SiC(nanometer)composite coating was prepared by the electroless depositing.The effect of the content of the nanometer SiC particles on the microstructure and properties was discussed.The results showed that depositing rate increased by adding proper nanometer SiC particles in the solution.The reason was that the liquid-solid interface increased,so the effective activating area increased.For the nanometer SiC in the film,the coating hardness increased.The hardness of the film reached 1000～1100HV before annealing and could reach 1650HV after annealing.The wear resistance of the nanometer coating increased comparing with the micrometer composite coating.The crystallizing rule of the film was analyzed by DSC and the crystallizing temperature increased greatly.