Abstract： The effect of yttria-stabilized zirconia (YSZ) powders on structures and properties of plasma-sprayed thermal barrier coatings was analyzed for different types of powders. The results indicate that the porosity of fused crushed powders coatings is small, and the thermal conductivity is large. The porosity of hollow spheres powders coatings is medium. The porosity between layers is high, the interface amount of flat particles is large, and the thermal conductivity is the smallest. The porosity of agglomerate sintered powders coatings is the largest, but for the porosity between layers and interface amount of flat particles being lower than those of hollow spheres powders coatings, the thermal conductivity is between them. YSZ powders with high purity and low density can improve the sintering resistance performance of thermal barrier coatings. From the perspective of decreasing thermal conductivity of thermal barrier coatings and extending life length in high temperature, the technology of high purity and low density hollow spheres powders should be developed.

Keywords: plasma spray; thermal barrier coatings; yttria-stabilized zirconia powder

中图分类号：TQ174           文献标志码：A

文章编号：1008-5548（2014）05-0058-05

DOI:10.13732/j.issn.1008-5548.2014.05.015

收稿日期：2013-12-23， 修回日期：2014-01-21，在线出版时间：2014-10-11。

第一作者简介：白描(1990—)，女，硕士研究生，研究方向为氧化锆热障涂层性能及应用。 电话：18700973436，E-mail:baimiao1324@163.com。

通信作者简介：李飞(1973—)，男，博士研究生，高级工程师，研究方向为纳米陶瓷材料。 E-mail: kwxu@mail.xjtu.edu.cn。