Wear Analysis of Plasma Sprayed Calcium and Strontium Zirconates on Inconel 718

CaZrO 3 and SrZrO 3 powders were prepared by sol -gel synthesis and plasma sprayed over the Inconel 718 substrate,forming a wear-resistant ceramic coating. X -Ray Diffraction (XRD) analysis of synthesized ceramic powders revealed the presence of CaZrO 3 and SrZrO 3 phases, having an orthorhombic structure. CaZrO 3 and SrZrO 3 powders were sprayed onto the surface of Inconel 718using a plasma spraying process. Scanning Electron Microscope (SEM)analysis of CaZrO 3 and SrZrO 3 coated samplesshowedanaveragethickness of about 400 mu m.Wear depth and wear mechanism for the above sampleswerestudiedusing Pin-on-disc apparatus. Wear results of CaZrO 3 and SrZrO 3 coated substrates revealed that high wear depths were observed at high speeds and loads. SEM investigations of wornout samples revealed that both CaZrO 3 and SrZrO 3 coated samples had undergone delamination wear. CaZrO 3 coated samples had exhibitedless delamination and wear depth than SrZrO 3 coated samples, thus showing relatively better wear resistance.