首页|Al2O3改性等离子喷涂-物理气相沉积热障涂层的异物损伤行为及失效机理

Al2O3改性等离子喷涂-物理气相沉积热障涂层的异物损伤行为及失效机理

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由外来异物损伤引起的颗粒冲蚀是制约热障涂层使用寿命的重要因素.为了提高等离子喷涂-物理气相沉积(PS-PVD)热障涂层的耐冲蚀性能,采用磁控溅射和真空热处理在PS-PVD喷涂的7YSZ热障涂层表面制备一层致密的α-Al2O3.系统研究热障涂层的异物损伤行为,并采用第一性原理计算对α-Al2O3/c-ZrO2界面进行研究.结果表明,PS-PVD、大气等离子喷涂(APS)和电子束-物理气相沉积(EB-PVD)热障涂层的冲蚀质量损失率分别为324、248和139 μg/g,而Al2O3改性的PS-PVD热障涂层的冲蚀质量损失率降至199μg/g.此外,在Al2O3/ZrO2-O的顶部构型模型中观察到的界面结合能最高(3.88 J/m2),远高于ZrO2/Ni(2.011 J/m2),使界面结合性能得以提高.
Foreign object damage behavior and failure mechanism of Al2O3-modified TBCs prepared by PS-PVD
Particle erosion induced by foreign object damage(FOD)is an important factor that restricts the working life of thermal barrier coatings(TBCs).A dense α-Al2O3 overlay was prepared by magnetron sputtering and vacuum treatment on the surface of 7YSZ TBCs sprayed by plasma spray-physical vapor deposition(PS-PVD)to improve the erosion resistance of the TBCs.The FOD behavior of the TBCs was systematically studied and the interface ofα-Al2O3/c-ZrO2 was investigated by first principles calculations.The experimental results show that the erosion rates of the PS-PVD,atmospheric plasma spraying(APS),and electron beam-physical vapor deposition(EB-PVD)TBCs were 324,248,and 139 μg/g,respectively,while the erosion rate of the Al2O3-modified PS-PVD TBCs was reduced to 199 μg/g.In addition,the highest interface adhesive energy of 3.88 J/m2 observed in the top configuration model of Al2O3/ZrO2-O is much higher than that of ZrO2/Ni(2.011 J/m2),which results in improved interface bonding performance.

thermal barrier coatingsplasma spray-physical vapor depositionAl2O3-modificationforeign object damagefirst principles

王梓帆、范佳锋、康楷雯、吴健、刘敏、周克崧、张乾、张志波、李小强、张小锋

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西安理工大学应用化学系,西安 710048

广东省科学院新材料研究所现代材料表面工程技术国家工程实验室,广东省现代表面工程技术重点实验室,广州 510650

华南理工大学国家金属材料近净成形工程技术研究中心,广东省先进金属材料制造与成型重点实验室,广州 510640

热障涂层 等离子喷涂-物理气相沉积 Al2O3改性 外来异物损伤 第一性原理

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Guangdong Province,ChinaNatural Science Foundation of Guangdong Province,ChinaGuangdong Special Support Program,ChinaGuangdong Academy of Sciences Program,China

52172067921602022021B15150200382020B15150200362019BT02C6292020GDASYL-20200104030

2024

10.1016/S1003-6326(24)66541-6

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(7)