The Effects of the Process Parameters on Micro-Hardness for Electroless Ni-P-Nano SiC Composite Plating
The orthogonal test method has been used to study the effects of the concentration of SiC, the speed of mixing, the temperature and the surfactants on micro-hardness, and obtained 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 the concentration of SiC particles on micro-hardness is biggest, and the surfactants is next. Give consideration to depositing rate and stability of the liquid, the temperature should be controlled at 82±2°C, the concentration of SiC particles and surfactants should be controlled in 4g/L and 60mg/L.
Helen Zhang and David Jin
H. Wang "The Effects of the Process Parameters on Micro-Hardness for Electroless Ni-P-Nano SiC Composite Plating", Advanced Materials Research, Vol. 366, pp. 187-191, 2012