燃气热冲击对PS-PVD和APS热障涂层的微结构和隔热性能的影响  

Effects of Gas Thermal Shock on Microstructure and Heat Insulation Properties of Thermal Barrier Coatings by PS-PVD and APS

作　　者：张永[1,2,3] 刘敏 张吉阜 许晓嫦[1] 宋进兵 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]广东省新材料研究所现代材料表面工程技术国家工程实验室,广州510651 [3]广东省新材料研究所广东省现代表面工程技术重点实验室,广州510651

出　　处：《中国表面工程》2016年第3期57-64,共8页China Surface Engineering

基　　金：国家重点基础研究发展计划(973计划)(2012CB625105);广东省自然科学基金研究团队项目(2016A030312015)

摘　　要：采用等离子喷涂-物理气相沉积(PS-PVD)和大气等离子喷涂(APS)技术分别制备柱状和层状YSZ陶瓷层,在1 250℃的燃气热冲击下对比研究两种涂层体系的微结构演变和隔热性能变化。结果显示,燃气热冲击后PS-PVD和APS制备的两种YSZ层主要由t'相和c相构成。APS制备的YSZ层微裂纹不断生长开裂并出现局部层状剥落,而PS-PVD制备的YSZ层的"菜花头"间隙不断增大并出现局部"菜花头"剥落。同时表明,PS-PVD制备的热障涂层在长期燃气热冲击时抗氧化性及隔热效果均优于APS制备的热障涂层。Columnar YSZ ceramic layer and layered YSZ ceramic layer were respectively prepared by plasma spraying- physical vapor deposition （PS-PVD） and atmospheric plasma spraying （APS）. The structures and heat insulation properties of PS-PVD coatings were compared with those of APS coatings under gas thermal shock test at 1 250℃. The result show that after gas thermal shock, both coatings were mainly composed oft＇-phase and c-phase. The micro-cracks of APS-YSZ were growing and local layer peeling occurred to the YSZ layer, while the gap of ＂cauliflower head＂ of PSPVD-YSZ were larger and larger and the ＂cauliflower head＂ appeared local peeling off after gas thermal shock for long time. The results also indicated that the resistance to oxidation and heat insulation effect of YSZ prepared by PS-PVD were superior to that of YSZ prepared by APS for long gas thermal shock testing.

关 键 词：等离子喷涂-物理气相沉积 热障涂层 燃气热冲击 失效分析 

分 类 号：TG174.44[金属学及工艺—金属表面处理]