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.
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