Formation of Diamond-NiCrAl Cermet Coating through Cold Spray

In this work, diamond-NiCrAl composite powder was prepared by mechanical alloying and cold sprayed to form an ultra-hard cermet coating. The effect of diamond content on the characteristics of the milled powder and the as-sprayed coating was investigated. The results show that the microstructure, particle size distribution, and grain size of the powder was significantly influenced by the ball milling process and that the microstructure of the spray particles was completely retained in the coating.