Tribological contact pairs usually encounter solid-solid or solid-fluid interface experiencing surface originated failures through abrasion, erosion & corrosion. To combat these modes of wear & enhance the life, surface depositions such as plasma spraying & detonation spraying are being practised. In detonation spraying, the particle undergoing an interaction with combustion flame splashes with high velocity on the substrate; the resultant microstructure of the deposition is largely dependant on the particle velocity & consequent temperature. In the case of plain alumnina deposition, the deposition is a layer of lenticulted splats with certain porosity, however, with alumina-titania composite; the deposition is relatively denser presenting a structure similar to limited phase sintered. This can influence the tribological response of ceramic depositions.
