【摘 要】
：
本文研究了等离子喷涂NiCoCrAlTaY/Sc2O3-Y2O3-ZrO2 热障涂层的高温氧化行为,重点探讨了粘结底层氧化过程、界面热生长氧化物状态及涂层氧化失效机理。试验结果表明,界面
【机 构】
：
北京航空制造工程研究所,高能束流加工技术重点实验室,北京100024
【出 处】
：
第十八届国际热喷涂研讨会(ITSS`2015)暨第十九届全国热喷涂年会(CNTSC`2014)
论文部分内容阅读
本文研究了等离子喷涂NiCoCrAlTaY/Sc2O3-Y2O3-ZrO2 热障涂层的高温氧化行为,重点探讨了粘结底层氧化过程、界面热生长氧化物状态及涂层氧化失效机理。试验结果表明,界面热生长氧化物由NiO、Al2O3、(Ni,Co)Cr2O4 等氧化物及尖晶石组成,尖晶石脆性颗粒的形成,在氧化过程极易脱落,脱落处形成孔洞和裂纹,促进陶瓷层剥落失效。
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