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.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
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)
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
plasma spraying-physical vapor deposition （PS-PVD）
thermal barrier coating （TBC）
gas thermal shock
failure analysis
