High Temperature Oxidation Resistance Performance of NiCrAlY and NiCoCrAlYHfSi Arc Ion Plating Coating

被引：0

作者：

Du W. ^{[1
,2
]}

Shi Q. ^{[2
]}

Dai M. ^{[2
]}

Yi J. ^{[1
]}

Lin S. ^{[2
]}

Hou H. ^{[2
]}

机构：

[1] Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming

[2] National Engineering Laboratory for Modern Materials Surface Engineering Technology, The Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou

来源：

Cailiao Daobao/Materials Review | 2018年 / 32卷 / 07期

关键词：

Arc ion plating; Coating; High temperature oxidation resistance; Nickel base superalloy;

D O I：

10.11896/j.issn.1005-023X.2018.13.017

中图分类号：

学科分类号：

摘要：

NiCrAlY and NiCoCrAlYHfSi coatings were deposited on nickel-based superalloy DZ22B by arc ion plating. The microstructure, composition and high temperature oxidation resistance was compared, and the action of active elements in oxidation was discussed. Results show that the as-deposited coatings were mainly composed of γ'-Ni3Al/γ-Ni, β-NiAl, and α-Cr, and the addition of NiCoCr in NiCoCrAlYHfSi. After the heat treatment, the transformation of β-NiAl to γ'-Ni3Al occurred. The average oxidation rates of NiCrAlY and NiCoCrAlYHfSi coatings after 200 h were 0.072 3 g/(m2•h) and 0.052 7 g/(m2•h) at constant tempe-rature of 1 050℃. The α-Al2O3, NiCr2O4 and Cr2O3 phase firstly formed at the initial stage of oxidation of NiCrAlY. Cracks, holes and other defects were subsequently observed and the oxide extended to the interior of the coating along those defects. At the same time, TiO2 formed as a result of the diffusion of Ti in substrate. For NiCoCrAlYHfSi oxidation, metastable θ-Al2O3 formed at the initial stage and then transferred to stable α-Al2O3. The oxide layer is more uniform and dense compared to NiCrAlY, thus has better oxidation resistance. © 2018, Materials Review Magazine. All right reserved.

引用

页码：2267 / 2271

页数：4

共 16 条

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