Microscale lamellar NiCoCrAlY coating with improved oxidation resistance

Hui Peng; Hongbo Guo; Jian He; Shengkai Gong

doi:10.1016/j.surfcoat.2012.06.034

Microscale lamellar NiCoCrAlY coating with improved oxidation resistance

Hui Peng
, Hongbo Guo^*
, Jian He
, Shengkai Gong

^*Corresponding author for this work

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

A novel NiCoCrAlY coating was fabricated by plasma activated electron beam-physical vapor deposition (PA EB-PVD). Within the duplex coating, the β-NiAl phase precipitated as small lamellae (less than 1μm thick) in a γ matrix, predominantly oriented perpendicular to the coating surface. The oxidation results at 1373K show that the scaling rate constant during the steady-state oxidation of the novel coating is reduced by approximately 70% as compared with the conventional coating of similar composition produced by electron beam-physical vapor deposition (EB-PVD). This reduction in oxidation rate is attributed to a slower θ→α Al ₂O ₃ phase transformation during the initial stages of oxidation.

Original language	English
Pages (from-to)	110-116
Number of pages	7
Journal	Surface and Coatings Technology
Volume	207
DOIs	https://doi.org/10.1016/j.surfcoat.2012.06.034
State	Published - 25 Aug 2012

Keywords

Alumina scale
Coating
Oxidation
Plasma activated electron beam-physical vapor deposition (PA EB-PVD)

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10.1016/j.surfcoat.2012.06.034

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title = "Microscale lamellar NiCoCrAlY coating with improved oxidation resistance",

abstract = "A novel NiCoCrAlY coating was fabricated by plasma activated electron beam-physical vapor deposition (PA EB-PVD). Within the duplex coating, the β-NiAl phase precipitated as small lamellae (less than 1μm thick) in a γ matrix, predominantly oriented perpendicular to the coating surface. The oxidation results at 1373K show that the scaling rate constant during the steady-state oxidation of the novel coating is reduced by approximately 70\% as compared with the conventional coating of similar composition produced by electron beam-physical vapor deposition (EB-PVD). This reduction in oxidation rate is attributed to a slower θ→α Al 2O 3 phase transformation during the initial stages of oxidation.",

keywords = "Alumina scale, Coating, Oxidation, Plasma activated electron beam-physical vapor deposition (PA EB-PVD)",

author = "Hui Peng and Hongbo Guo and Jian He and Shengkai Gong",

year = "2012",

month = aug,

day = "25",

doi = "10.1016/j.surfcoat.2012.06.034",

language = "英语",

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pages = "110--116",

journal = "Surface and Coatings Technology",

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TY - JOUR

T1 - Microscale lamellar NiCoCrAlY coating with improved oxidation resistance

AU - Peng, Hui

AU - Guo, Hongbo

AU - He, Jian

AU - Gong, Shengkai

PY - 2012/8/25

Y1 - 2012/8/25

N2 - A novel NiCoCrAlY coating was fabricated by plasma activated electron beam-physical vapor deposition (PA EB-PVD). Within the duplex coating, the β-NiAl phase precipitated as small lamellae (less than 1μm thick) in a γ matrix, predominantly oriented perpendicular to the coating surface. The oxidation results at 1373K show that the scaling rate constant during the steady-state oxidation of the novel coating is reduced by approximately 70% as compared with the conventional coating of similar composition produced by electron beam-physical vapor deposition (EB-PVD). This reduction in oxidation rate is attributed to a slower θ→α Al 2O 3 phase transformation during the initial stages of oxidation.

AB - A novel NiCoCrAlY coating was fabricated by plasma activated electron beam-physical vapor deposition (PA EB-PVD). Within the duplex coating, the β-NiAl phase precipitated as small lamellae (less than 1μm thick) in a γ matrix, predominantly oriented perpendicular to the coating surface. The oxidation results at 1373K show that the scaling rate constant during the steady-state oxidation of the novel coating is reduced by approximately 70% as compared with the conventional coating of similar composition produced by electron beam-physical vapor deposition (EB-PVD). This reduction in oxidation rate is attributed to a slower θ→α Al 2O 3 phase transformation during the initial stages of oxidation.

KW - Alumina scale

KW - Coating

KW - Oxidation

KW - Plasma activated electron beam-physical vapor deposition (PA EB-PVD)

UR - https://www.scopus.com/pages/publications/84865803554

U2 - 10.1016/j.surfcoat.2012.06.034

DO - 10.1016/j.surfcoat.2012.06.034

M3 - 文章

AN - SCOPUS:84865803554

SN - 0257-8972

VL - 207

SP - 110

EP - 116

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Microscale lamellar NiCoCrAlY coating with improved oxidation resistance

Abstract

Keywords

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