Abstract: The deposition of a uniform Nickel Phosphorous (Ni-P) coating on Silicon Carbide (SiC) particles by an electroless method was investigated in this research. The electroless bath is prepared with nickel sulfate and sodium hypophosphite at pH value of 8. In this research the effect of two different particle size 10 and 80 μm and the influence of both time and temperature on (Ni-P) coating deposition were studied. (Ni-P) coating is analyzed by optical microscopy (SEM) and (EDS). Uniformity in coating were obtained for pre-treated SiC with particle size of 80 μm at bath temperature of 70°C and stirring time of 15 min. Non-uniform coating was noted in SiC of 10 μm and in SiC of 80 μm during deposition time of 5 and 10 min. Electroless bath temperature of 50, 60 and 80°C resulted in the formation of segregated clusters of (Ni-P) leading in many uncoated parts of SiC particles.
Mofeed A.L. Jaleel, Zooleka Ali Abdallah and Eman M. Kadhim Al-Dulimyi, 2019. Effect of Particle Size and Coating Parameters on the Uniformity of Ni-P Electroless Coating Applied on SiC Particles. Research Journal of Applied Sciences, 14: 103-109.