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

Production of aluminum matrix composite coatings containing SiCp, as well a s aluminum hybrid composite coatings containing SiC and graphite particles was explored by plasma spraying of premixed powders onto a solid aluminum a lloy substrate. In both Al + SiC and Al + SiC + Gr composite coatings, SiC particles have a quite uniform distribution, while the distribution of grap hite particles is inhomogeneous. No visible interval between the coating an d the substrate can be found, which proved a good compatibility and intimat e bonding between them. And no interfacial reaction products can be seen. ( C) 2001 Elsevier Science B.V. All rights reserved.