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

M. Ansari; R. Shoja-Razavi; M. Barekat; Hau Chung Man

doi:10.1016/j.corsci.2017.02.001

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

M. Ansari, R. Shoja-Razavi, M. Barekat, Hau Chung Man

Research output: Journal article publication › Journal article › Academic research › peer-review

31 Citations (Scopus)

Abstract

ï¿½ 2017 Elsevier Ltd 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 1200ï¿½ï¿½C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200ï¿½ï¿½C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3and Al5Y3O12phases; however, NiO, Cr2O3and Ni(Cr,Al)2O4phases were not detected.

Original language	English
Pages (from-to)	168-177
Number of pages	10
Journal	Corrosion Science
Volume	118
DOIs	https://doi.org/10.1016/j.corsci.2017.02.001
Publication status	Published - 1 Apr 2017

Keywords

A. Metal coatings
A. Superalloys
C. High temperature corrosion
C. Oxidation

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

More information

10.1016/j.corsci.2017.02.001

Scopus Link

Cite this

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title = "High-temperature oxidation behavior of laser-aided additively manufactured NiCrAlY coating",

abstract = "{\"i}¿½ 2017 Elsevier Ltd 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{\"i}¿½{\"i}¿½C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200{\"i}¿½{\"i}¿½C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3and Al5Y3O12phases; however, NiO, Cr2O3and Ni(Cr,Al)2O4phases were not detected.",

keywords = "A. Metal coatings, A. Superalloys, C. High temperature corrosion, C. Oxidation",

author = "M. Ansari and R. Shoja-Razavi and M. Barekat and Man, {Hau Chung}",

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doi = "10.1016/j.corsci.2017.02.001",

language = "English",

volume = "118",

pages = "168--177",

journal = "Corrosion Science",

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T1 - High-temperature oxidation behavior of laser-aided additively manufactured NiCrAlY coating

AU - Ansari, M.

AU - Shoja-Razavi, R.

AU - Barekat, M.

AU - Man, Hau Chung

PY - 2017/4/1

Y1 - 2017/4/1

N2 - ï¿½ 2017 Elsevier Ltd 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 1200ï¿½ï¿½C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200ï¿½ï¿½C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3and Al5Y3O12phases; however, NiO, Cr2O3and Ni(Cr,Al)2O4phases were not detected.

AB - ï¿½ 2017 Elsevier Ltd 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 1200ï¿½ï¿½C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200ï¿½ï¿½C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3and Al5Y3O12phases; however, NiO, Cr2O3and Ni(Cr,Al)2O4phases were not detected.

KW - A. Metal coatings

KW - A. Superalloys

KW - C. High temperature corrosion

KW - C. Oxidation

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DO - 10.1016/j.corsci.2017.02.001

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JF - Corrosion Science

SN - 0010-938X

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