Aluminum hybrid composite coatings containing SiC and graphite particles by plasma spraying

Production of aluminum matrix composite coatings containing SiC p, as well as aluminum hybrid composite coatings containing SiC and graphite particles was explored by plasma spraying of premixed powders onto a solid aluminum alloy substrate. In both Al+SiC and Al+SiC+Gr composite coatings, SiC particles have a quite uniform distribution, while the distribution of graphite particles is inhomogeneous. No visible interval between the coating and the substrate can be found, which proved a good compatibility and intimate bonding between them. And no interfacial reaction products can be seen.