The Dispersion of Nanometer SIC on Electro Less Ni-P-Nano SIC Composite Plating

摘要

In this study, we study the effects of the concentration of Sic using the orthogonal test method, the speed of mixing, the temperature and the surfactants on depositing rate and micro-hardness and obtain the optimized technological scheme and fine Ni-P-SIC composite coating. The results showed that using citric acid-acetic acid as complexing agents can obtain high speed of depositing and homogeneous coating with Sic well-distributed. Among the technological parameters, the effects of temperature on depositing rate are biggest and the surfactants are next; the effects of the concentration of Sic particles on micro-hardness are biggest and the surfactants are next. Give consideration to depositing rate and stability of the liquid, the temperature should be controlled at 82±2℃, the concentration of Sic particles and surfactants should be controlled in 4 g/L and 60 mg/L. The influence to micro-hardness value of coating with ultrasonic disperser craft also is studied.