对含8%, 11%和20%Y_2O_3的Zro_2粉末,进行了最佳等离子喷涂工艺参数试验研究。收集在玻璃载片上的飞溅物表明粉末颗粒的速度高,熔化较好。飞溅物和涂层的显微结构显示:随着电流和Hz气量增加,徐层的孔隙率降低,质量提高,但未发现延长了颗粒在火焰中的停留时间。在炉内加热循环中,11%Y_2O_3稳足的ZrO_2■3%Y_2O_3稳定的ZtO_2的涂层性能更好, Zro_2 powder containing 8%, 11% and 20% Y_2O_3 was tested by the best plasma spray process parameters. Splashes collected on glass slides indicate that the powder particles are high in speed and melt well. The microstructures of the spatters and coatings show that the porosity of the Xu layer decreases and the quality increases with increasing current and Hz gas, but no longer residence time of the particles in the flame is found. In the furnace heating cycle, 11% Y_2O_3 steady enough ZrO_2 ■ 3% Y_2O_3 stable ZtO_2 coating performance better,