Effect of Thermal Treatment on the Grain Growth of Nanostructured YSZ Thermal Barrier Coating Prepared by Air Plasma Spraying
Effect of Thermal Treatment on the Grain Growth of Nanostructured YSZ Thermal Barrier Coating Prepared by Air Plasma Spraying
复制标题
DOI：
10.1016/s1000-9361(11)60224-0
复制
发表时间：
2004-05
影响因子：
5.7
通讯作者：
Zhenbo Wang;Chungen Zhou;Xu Huibin;S. Gong
中科院分区：
文献类型：
--
作者：
Zhenbo Wang;Chungen Zhou;Xu Huibin;S. Gong
采用空气等离子喷涂法制备了平均粒径为40 nm、质量分数为8wt%Y2O3部分稳定氧化锆纳米粉体的纳米结构热障涂层。采用SEM、TEM、XRD等分析手段研究了原料粉末和涂层的显微结构和相组成。结果表明，喷涂态氧化锆涂层的平均晶粒尺寸为67 nm，涂层主要由亚稳的四方相组成，并含有少量的单斜相和四方相。热处理结果表明，在900°C以下，纳米结构涂层的晶粒略有长大，而在1000°C以上，晶粒迅速长大，并出现明显的单斜相。
A nanostructured thermal barrier coating is prepared by air plasma spraying using the 8wt% Y2O3partially stabilized zirconia nano-powder with an average grain size of 40 nm. The microstructure and phase composition of feedstock nano-powder and coating are investigated using SEM, TEM and XRD. It is found that the as-sprayed zirconia coating has an average grain size of 67 nm and mainly consistes of metastable tetragonal phase, together with some monoclinic phase and tetragonal phase. Thermal treatment results show that the grains of the nanostructured coating grow slightly below 900°C, whereas over 1000°C the gains grow rapidly and monoclinic phase noticeably appeares.