Study of ultra-fine ceramic coatings containing nano-size nickel particles

In order to improve the oxidation and wear resistance of superalloy GH202, the ultra-fine ceramic coating containing nano-size nickel particles was obtained by flow coat method. The effect of nano-size nickel particles on the coating-substrate was investigated through oxidation kinetics experiment and wear resistance test. The morphology of the specimens was examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the ultra-fine ceramic coating has notable effect preventing GH202 from high temperature oxidation. The anti-oxidation and wear resistance of the coating were improved significantly by adding nano-size nickel particles, and the best coating components is found to be containing 10% (mass fraction) nano-size nickel particles.