Electrophoretic deposition of SiC nanoparticles

The aim of this research is to investigate the stability of SiC nanoparticles for deposition on C/C composite by EPD method. Thus, different suspensions were prepared with different solvents and in presence of PEI as dispersant. The stability of suspensions was studied by using their macroscopic pictures after 24 h, and measurement of zeta potential values and particle size distribution. Thereafter, the coating was applied onto the substrate using the optimized suspension. The results showed that the suspension prepared in ethanol, with pH=10 and addition of 6 wt% PEI has the best stability. Also, SEM micrographs revealed that the coating applied with the voltage of 30 V results in a better quality and has a uniform and pitiless surface.