Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying

Li Zhang; Di Wang; Xian Jin Liao; Rui Chen; Xiao Tao Luo; Chang Jiu Li

doi:10.1038/s41529-023-00383-0

Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying

Li Zhang
, Di Wang
, Xian Jin Liao
, Rui Chen
, Xiao Tao Luo
, Chang Jiu Li

School of Materials Science and Engineering

Xi'an Jiaotong University

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

12 Scopus citations

Abstract

A dense NiAl coating with low oxide content was deposited on the GH4202 superalloy substrate by atmospheric plasma spraying (APS) using carbon-containing Ni/Al composite powders. Compared with traditional APS NiAl coatings with high oxide content, this coating exhibits better long-term oxidation resistance at 900 °C in air. For the NiAl coating with low oxide content, it was found that the improved inter-splat bonding, due to limited oxide inclusions, promotes the formation of a continuous protective Al₂O₃ layer on the coating surface during oxidation. During long-term oxidation, the dispersion of oxide scales within the coating and element diffusion across splats result in the in-situ healing of unbonded inter-splat interfaces.

Original language	English
Article number	62
Journal	npj Materials Degradation
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41529-023-00383-0
State	Published - Dec 2023

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title = "Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying",

abstract = "A dense NiAl coating with low oxide content was deposited on the GH4202 superalloy substrate by atmospheric plasma spraying (APS) using carbon-containing Ni/Al composite powders. Compared with traditional APS NiAl coatings with high oxide content, this coating exhibits better long-term oxidation resistance at 900 °C in air. For the NiAl coating with low oxide content, it was found that the improved inter-splat bonding, due to limited oxide inclusions, promotes the formation of a continuous protective Al2O3 layer on the coating surface during oxidation. During long-term oxidation, the dispersion of oxide scales within the coating and element diffusion across splats result in the in-situ healing of unbonded inter-splat interfaces.",

author = "Li Zhang and Di Wang and Liao, \{Xian Jin\} and Rui Chen and Luo, \{Xiao Tao\} and Li, \{Chang Jiu\}",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

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doi = "10.1038/s41529-023-00383-0",

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T1 - Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying

AU - Zhang, Li

AU - Wang, Di

AU - Liao, Xian Jin

AU - Chen, Rui

AU - Luo, Xiao Tao

AU - Li, Chang Jiu

PY - 2023/12

Y1 - 2023/12

N2 - A dense NiAl coating with low oxide content was deposited on the GH4202 superalloy substrate by atmospheric plasma spraying (APS) using carbon-containing Ni/Al composite powders. Compared with traditional APS NiAl coatings with high oxide content, this coating exhibits better long-term oxidation resistance at 900 °C in air. For the NiAl coating with low oxide content, it was found that the improved inter-splat bonding, due to limited oxide inclusions, promotes the formation of a continuous protective Al2O3 layer on the coating surface during oxidation. During long-term oxidation, the dispersion of oxide scales within the coating and element diffusion across splats result in the in-situ healing of unbonded inter-splat interfaces.

AB - A dense NiAl coating with low oxide content was deposited on the GH4202 superalloy substrate by atmospheric plasma spraying (APS) using carbon-containing Ni/Al composite powders. Compared with traditional APS NiAl coatings with high oxide content, this coating exhibits better long-term oxidation resistance at 900 °C in air. For the NiAl coating with low oxide content, it was found that the improved inter-splat bonding, due to limited oxide inclusions, promotes the formation of a continuous protective Al2O3 layer on the coating surface during oxidation. During long-term oxidation, the dispersion of oxide scales within the coating and element diffusion across splats result in the in-situ healing of unbonded inter-splat interfaces.

UR - https://www.scopus.com/pages/publications/85167397165

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DO - 10.1038/s41529-023-00383-0

M3 - 文章

AN - SCOPUS:85167397165

SN - 2397-2106

VL - 7

JO - npj Materials Degradation

JF - npj Materials Degradation

IS - 1

M1 - 62

ER -

Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying

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