纳米Y_2O_3对氧化锆陶瓷涂层显微组织和抗高温氧化性能的影响  

Effect of Nanometer Y_2O_3 on Microstructure and High Temperature Oxidation Resistance of ZrO_2 Ceramic Coatings

作　　者：乔岳云[1] 李建国[1] 胡建平[1] 霍日昌[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《热加工工艺》2008年第17期116-118,共3页Hot Working Technology

基　　金：教育部春晖计划资助项目(Z2004-1-15004)

摘　　要：在ZrO2陶瓷基粉体中添加适量纳米Y2O3,采用等离子喷涂工艺制备陶瓷涂层。对涂层进行了显微组织分析、抗高温氧化试验和耐磨损性能试验,研究了添加剂Y2O3对涂层显微组织和抗高温氧化性能的影响。研究结果表明,纳米Y2O3的加入可以减少涂层中的孔隙,提高涂层的致密性,且随着纳米Y2O3加入量的增加,涂层的抗氧化能力先增强后减弱,纳米Y2O3以5%加入涂层中孔隙最少,晶粒细化,涂层致密,抗氧化性能最好。Adding nano-Y2O3 into the ZrO2 ceramic base powder body, the ceramic coatingswere prepared by plasma spraying. The wear resistanc6 of the coating were studied and the influence of nano-Y2O3 powder on the microstructure and high temperature oxidation resistance of the coating were investigated. The results show that the addition of nano-Y2O3 can reduce porosity in the coating and improve coating compactness. With the increase of nano- Y2O3, the antioxidant capacity weaken after strengthening. The coating adding nano-Y2O3 of 5% has the least pores, the finer grain, the better density and the best antioxidant properties.

关 键 词：等离子喷涂 热障涂层 纳米Y2O3 抗高温氧化性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]