Effect of pre-oxidation on the isothermal and cyclic oxidation behaviour of cold-sprayed NiCoCrAlY coating

S. F. Xie; L. W. Zhang; X. J. Ning; L. Wang; D. P. Lu

doi:10.1179/1432891715Z.0000000001979

Effect of pre-oxidation on the isothermal and cyclic oxidation behaviour of cold-sprayed NiCoCrAlY coating

S. F. Xie
, L. W. Zhang^*
, X. J. Ning
, L. Wang
, D. P. Lu

^*Corresponding author for this work

School of Material Science and Engineering

Jiangxi Academy of Sciences

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

8 Citations (Scopus)

Abstract

The effects of vacuum pre-oxidation treatment on the isothermal and cyclic oxidation behaviour of a cold-sprayed NiCoCrAlY coating are investigated. It is found that the cold-sprayed NiCoCrAlY coating has a dense structure with low oxygen content and consists of a single γ-matrix phase. A uniform and continuous α-Al₂O₃ layer with a thickness of 0.47 ± 0.02 μm can be obtained by pre-oxidation treatment in a vacuum environment. The pre-oxidation treatment decreases the growth rate of thermally grown oxide by the formation of Al₂O₃ with larger grain sizes and thus improves the thermal cyclic life of coating. Surface-geometry imperfections are the source of initial spallation of thermally grown oxide.

Original language	English
Pages (from-to)	S9258-S9262
Journal	Materials Research Innovations
Volume	19
DOIs	https://doi.org/10.1179/1432891715Z.0000000001979
Publication status	Published - Nov 2015

Keywords

Cold spray
NiCoCrAlY
Oxidation
Pre-oxidation
Thermally grown oxide

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10.1179/1432891715Z.0000000001979

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title = "Effect of pre-oxidation on the isothermal and cyclic oxidation behaviour of cold-sprayed NiCoCrAlY coating",

abstract = "The effects of vacuum pre-oxidation treatment on the isothermal and cyclic oxidation behaviour of a cold-sprayed NiCoCrAlY coating are investigated. It is found that the cold-sprayed NiCoCrAlY coating has a dense structure with low oxygen content and consists of a single γ-matrix phase. A uniform and continuous α-Al2O3 layer with a thickness of 0.47 ± 0.02 μm can be obtained by pre-oxidation treatment in a vacuum environment. The pre-oxidation treatment decreases the growth rate of thermally grown oxide by the formation of Al2O3 with larger grain sizes and thus improves the thermal cyclic life of coating. Surface-geometry imperfections are the source of initial spallation of thermally grown oxide.",

keywords = "Cold spray, NiCoCrAlY, Oxidation, Pre-oxidation, Thermally grown oxide",

author = "Xie, \{S. F.\} and Zhang, \{L. W.\} and Ning, \{X. J.\} and L. Wang and Lu, \{D. P.\}",

note = "Publisher Copyright: {\textcopyright} W. S. Maney \& Son Ltd 2015.",

year = "2015",

month = nov,

doi = "10.1179/1432891715Z.0000000001979",

language = "English",

volume = "19",

pages = "S9258--S9262",

journal = "Materials Research Innovations",

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TY - JOUR

T1 - Effect of pre-oxidation on the isothermal and cyclic oxidation behaviour of cold-sprayed NiCoCrAlY coating

AU - Xie, S. F.

AU - Zhang, L. W.

AU - Ning, X. J.

AU - Wang, L.

AU - Lu, D. P.

N1 - Publisher Copyright: © W. S. Maney & Son Ltd 2015.

PY - 2015/11

Y1 - 2015/11

N2 - The effects of vacuum pre-oxidation treatment on the isothermal and cyclic oxidation behaviour of a cold-sprayed NiCoCrAlY coating are investigated. It is found that the cold-sprayed NiCoCrAlY coating has a dense structure with low oxygen content and consists of a single γ-matrix phase. A uniform and continuous α-Al2O3 layer with a thickness of 0.47 ± 0.02 μm can be obtained by pre-oxidation treatment in a vacuum environment. The pre-oxidation treatment decreases the growth rate of thermally grown oxide by the formation of Al2O3 with larger grain sizes and thus improves the thermal cyclic life of coating. Surface-geometry imperfections are the source of initial spallation of thermally grown oxide.

AB - The effects of vacuum pre-oxidation treatment on the isothermal and cyclic oxidation behaviour of a cold-sprayed NiCoCrAlY coating are investigated. It is found that the cold-sprayed NiCoCrAlY coating has a dense structure with low oxygen content and consists of a single γ-matrix phase. A uniform and continuous α-Al2O3 layer with a thickness of 0.47 ± 0.02 μm can be obtained by pre-oxidation treatment in a vacuum environment. The pre-oxidation treatment decreases the growth rate of thermally grown oxide by the formation of Al2O3 with larger grain sizes and thus improves the thermal cyclic life of coating. Surface-geometry imperfections are the source of initial spallation of thermally grown oxide.

KW - Cold spray

KW - NiCoCrAlY

KW - Oxidation

KW - Pre-oxidation

KW - Thermally grown oxide

UR - https://www.scopus.com/pages/publications/84947967736

U2 - 10.1179/1432891715Z.0000000001979

DO - 10.1179/1432891715Z.0000000001979

M3 - Article

AN - SCOPUS:84947967736

SN - 1432-8917

VL - 19

SP - S9258-S9262

JO - Materials Research Innovations

JF - Materials Research Innovations

ER -

Effect of pre-oxidation on the isothermal and cyclic oxidation behaviour of cold-sprayed NiCoCrAlY coating

Abstract

Keywords

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