Abstract
TiCN–Cu coatings were fabricated by reactive plasma spraying using Ti-graphite aggregates and Cu powders. The crystallization, mechanical and tribological properties were investigated. The results showed that TiCN–Cu coatings shared a face-center cubic structure and they consisted of TiC0·7N0.3, TiN0·3O, Cu2O, Cu, amorphous CNx and residual graphite phases. The addition of Cu mainly changed the crystallization behavior of the coating surface and binding surface with the substrate. Compared with TiCN coating, TiCN–Cu coatings had the lower hardness and hardness distribution uniformity. The incorporation of Cu improved the coating fracture toughness, while failed to improve the coating tribological properties. The main wear mechanism of TiCN–Cu coatings in the present sliding test were adhesive wear, coupling with partial tribo-oxidation wear.
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