Research on Process of Plasma-sprayed Nano-structured ZrO_2 Ceramic Coatings
The influence of process parameters on the microstructure and mechanical property of plasma-sprayed nano-structured ZrO2 ceramic coatings was investigated. Three main process parameters that controlled the quality of ZrO2 coatings were optimized by orthogonal experiment design. For each sprayed coating, the non-molten area of coatings was measured by quantitative image analysis. The adhesive strength, the crack growth resistance and the wear resistance of coatings were obtained. The results show that the optimum process parameters of preparing nano-ZrO2 ceramic coatings are 540 A, 63 V and 45 L/min.