高速微粒轰击对热障涂层热生长氧化物生长过程的影响  

Effect of high-speed fine particles bombarding on thermally grown oxide growth process of thermal barrier coatings

作　　者：张丽娟[1] 林晓娉[1] 刘春阳[1] 王志平[2] 丁坤英[2] 贾鹏[2] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]中国民航大学理学院,天津300300

出　　处：《材料热处理学报》2009年第3期182-186,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50575220)

摘　　要：研究了高速微粒轰击NiCoCrAlY粘结层后的热障涂层热生长氧化物(TGO)的生长过程。结果表明:等离子喷涂涂层1050℃×72h高温氧化后TGO出现明显分层现象,而经过高速微粒轰击涂层1050℃×96h高温氧化后TGO形貌更为平坦且无分层现象发生。此外,NiCoCrAlY粘结层经高速微粒轰击后产生大量的位错网;TGO进入稳态氧化阶段时间缩短,稳态氧化阶段时间延长。涂层抗高温氧化性能明显提高。Growth process of thermally grown oxide （TGO） for NiCoCrAIY bond coating after high-speed fine particles bombarding was studied. It is shown that the apparent lamination forms in TGO for as-sprayed coating after oxidation at 1050℃ for 72h. However, no lamination in TGO is observed for the high-speed fine particles bombarded coatings after oxidation at 1050℃ for 96h. Furthermore, high density dislocation nets form in the NiCoCrAIY bond coating after high-speed fine particles bombarding, and the time for TGO coming into steady-state oxidation stage is shortened and the period of steady-state oxidation becomes longer. The high-temperature oxidation resistance of the thermal barrier coatings prepared on the bombarded NiCoCrAIY bond coating is improved obviously.

关 键 词：高速微粒轰击 TGO 抗高温氧化性能 热障涂层 

分 类 号：TG162.83[金属学及工艺—热处理] TG174.44[金属学及工艺—金属学]