Enhanced interfacial bonding and superior oxidation resistance of CoCrAlY-TiB2 composite coating fabricated by air plasma spraying

被引：9
作者：
An, Qi [2 ]
Huang, Lujun [1 ,2 ]
Wei, Shaolou [2 ,3 ]
Zhang, Rui [2 ]
Rong, Xudong [2 ]
Wang, You [2 ]
Geng, Lin [1 ,2 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, POB 433, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
[3] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
CORROSION SCIENCE | 2019年 / 158卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Air plasma spray; CoCrAlY-TiB2 composite coating; Microstructures; Bonding strength; Cyclic oxidation; THERMAL BARRIER COATINGS; SURFACE MICROSTRUCTURE; NICOCRALY COATINGS; CYCLIC OXIDATION; BEHAVIOR; TEMPERATURE; EVOLUTION;
D O I：
10.1016/j.corsci.2019.108102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to enhance oxidation resistance of titanium matrix materials, CoCrAlY-TiB2 coating is introduced by air plasma spray. Tensile test demonstrates that TiB2 addition promoted interfacial bonding strength with a maximum enhancing effect of 22.6%, which alleviated mechanical spallation of the coating and consequently gave rise to the improved physicochemical stability. Cyclic oxidation tests at 700, 800, and 900 degrees C reveal that weight gain of coated specimens reduced by 66.7%, 73.1%, and 75.2% compared with the TMCs substrate. The significantly enhanced anti-oxidation performance was mostly ascribed to the improved microstructural stability and the formation of dense Al2O3 and Cr2O3 oxides.
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页数：11
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