Edrisy et al studied the
Wear resistance is an issue in several industrial domains as metallurgy, paper or petroleum industry. To face this Geldanamycin problem, industries aim to develop solutions to, in one hand, avoid wear damage, and, in the other hand, fix worn parts , , , ,  and . For this second solution, thermal spraying is an interesting technique , , , ,  and . Thermal spraying includes several methods which are all based on the melting of a feedstock material and then its projection on a substrate through a carrier gas  and . The projected droplets are molten metal or material in the semi-solid state. Once in contact with the substrate, the projected particles have a high cooling rate driving to hardened microstructure, usually composed of a single phase . Thus the original structure of the feedstock material changed during the deposition process. In the case of alumina for example, while the feedstock material is conifers α-Al2O3, the thermal sprayed coating is composed of γ-Al2O3 and . Moreover, when thermal spraying is processed in ambient atmosphere, feedstock material particles and substrate are subjected to oxidation. Oxidation can occur at different stages of the spraying process ,  and :–Oxidation of the heated metallic droplets during their flight to the substrate;–Oxidation during the splat formation on the substrate surface;–Oxidation of the coating surface between two sequential deposition steps.