Cyclic oxidation behavior of glass-ceramic composite coatings on superalloy K38G at 1100 °C

被引：22

作者：

Shen, Mingli ^{[1
]}

Zhu, Shenglong ^{[1
]}

Wang, Fuhui ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China

来源：

THIN SOLID FILMS | 2011年 / 519卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Glass-ceramic coating; NiCoCrAlY; Cyclic oxidation; Magnetron sputtering; RESISTANCE; MICROSTRUCTURE;

D O I：

10.1016/j.tsf.2011.01.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The SiO2-Al2O3-ZrO2-CaO-ZnO glass-ceramic composite coatings (GC), nanocrystalline NiCoCrAlY coating, and their combinations (bi-layer GC/NiCoCrAlY) were prepared on K38G specimens. The thicknesses of the glass-ceramic coatings and the NiCoCrAlY coatings were about 10 mu m and 20 mu m, respectively. Cyclic oxidation tests were carried out at 1100 degrees C for 120 cycles. Microstructures of the specimens before and after oxidation tests were characterized by SEM, EDS and XRD. The glass-ceramic coatings with or without a NiCoCrAlY intermediate layer improved the isothermal and cyclic oxidation resistance of the Ni-base superalloy K38G at 1100 degrees C, and performed better than the NiCoCrAlY coatings. An alumina layer formed at the glass/metal interfaces of the specimens coated by the glass-ceramic coatings with or without a NiCoCrAlY intermediate layer. The NiCoCrAlY intermediate layer was beneficial to the cyclic oxidation resistance of the glass-ceramic coatings. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：4884 / 4888

页数：5

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