Plasma Spraying of Self-Lubricating Cr₂O₃-CaF₂ Coatings

Results are presented of a project analysing the relationship between the production parameters of plasma sprayed self-lubricating Cr₂O₃-CaF₂ coatings and their structural, wear and lubricating properties. The production method consists of a preparation step where a powder blend of the matrix material (Cr203) and solid lubricant (CaF₂) is agglomerated, followed by atmospheric plasma spraying (APS) of the agglomerates. Selection of the most appropriate agglomeration and plasma spray parameters as well as the microstructure of the coatings will be discussed.