Effect of pre-oxidation on the failure mechanisms of EB-PVD thermal barrier coatings with (Ni,Pt)Al bond coats

被引：13
|
作者：
Li, S. [1 ]
Xu, M. M. [1 ]
Zhang, C. Y. [1 ]
Bao, Z. B. [1 ,2 ]
Yang, Y. F. [4 ]
Zhu, S. L. [1 ]
Wang, F. H. [3 ]
机构：
[1] Univ Sci & Technol China, Sch Mat Sci & Engn, Wenhua Rd 72, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Wencui Rd 62, Shenyang 110016, Peoples R China
[3] Northeastern Univ, Shenyang Natl Lab Mat Sci, Wenhua Rd 3, Shenyang 110819, Peoples R China
[4] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, West Huangpu Rd 601, Guangzhou 510632, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 193卷
基金：
中国国家自然科学基金;
关键词：
Thermal barrier coatings; Platinum; Pre-oxidation; Intermixed zone; Failure mechanism; HIGH-TEMPERATURE; OXIDATION PERFORMANCE; ALUMINA SCALE; GROWN OXIDE; DURABILITY; ALPHA-AL2O3; KINETICS; BEHAVIOR; STRESS;
D O I：
10.1016/j.corsci.2021.109873
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to clarify the effect of pre-oxidation for (Ni,Pt)Al bond coat on failure modes of TBCs, cyclic oxidation behavior of thermal barrier coatings system with both pre-oxidized and normal (Ni,Pt)Al bond coats was investigated at 1100 degrees C. The results indicated that thermal cycling resistance of TBCs was dramatically enhanced by pre-oxidation, where thinner and lower residual stress oxide scale, lighter rumpling of the BC/TGO interface were achieved pre-oxidized. The failure modes of these two TBCs were completely diverse. Besides, the lower oxygen partial pressure effectively enhanced transformation from theta to alpha-Al2O3 during pre-oxidation.
引用
收藏
页数：11
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