High-temperature oxidatiOn behavior of laser-aided additively manufactured NiCrAlY coating

被引：51

作者：

Ansari, M. ^{[1
]}

Shoja-Razavi, R. ^{[2
]}

Barekat, M. ^{[2
]}

Man, H. C. ^{[3
]}

机构：

[1] Islamic Azad Univ, Najafabad Branch, Young Researchers & Elite Club, Najafabad, Iran

[2] Malek Ashtar Univ Technol, Dept Mat Engn, Shahin Shahr, Isfahan, Iran

[3] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Hong Kong, Hong Kong, Peoples R China

来源：

CORROSION SCIENCE | 2017年 / 118卷

关键词：

Superalloys; Metal coatings; High temperature corrosion; Oxidation; MCRALY COATINGS; BOND-COAT; ISOTHERMAL OXIDATION; STAINLESS-STEEL; HOT CORROSION; SUPERALLOY; ALUMINUM; YTTRIUM; SCALES; ADDITIONS;

D O I：

10.1016/j.corsci.2017.02.001

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

In this study, NiCrAlY coatings were additively manufactured on the surface of IN738 substrate through a laser-aided additive manufacturing approach. The high-temperature oxidation behavior of freestanding coatings at 1200 degrees C was also investigated. The coatings were thick, dense, and well-bonded with dendritic gamma/beta microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200 degrees C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of alpha-Al2O3 and Al5Y3O12 phases; however, NiO, Cr2O3 and Ni(Cr,Al)(2)O-4 phases were not detected. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：168 / 177

页数：10

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