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 oxid...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-08-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-023-00383-0 |
| _version_ | 1797752614266339328 |
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| author | Li Zhang Di Wang Xian-Jin Liao Rui Chen Xiao-Tao Luo Chang-Jiu Li |
| author_facet | Li Zhang Di Wang Xian-Jin Liao Rui Chen Xiao-Tao Luo Chang-Jiu Li |
| author_sort | Li Zhang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T17:07:01Z |
| format | Article |
| id | doaj.art-5122163630294a3a99e0bedb422bf4e7 |
| institution | Directory Open Access Journal |
| issn | 2397-2106 |
| language | English |
| last_indexed | 2024-03-12T17:07:01Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj.art-5122163630294a3a99e0bedb422bf4e72023-08-06T11:21:18ZengNature Portfolionpj Materials Degradation2397-21062023-08-017111110.1038/s41529-023-00383-0Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma sprayingLi Zhang0Di Wang1Xian-Jin Liao2Rui Chen3Xiao-Tao Luo4Chang-Jiu Li5State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityAbstract 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.https://doi.org/10.1038/s41529-023-00383-0 |
| spellingShingle | Li Zhang Di Wang Xian-Jin Liao Rui Chen Xiao-Tao Luo Chang-Jiu Li Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying npj Materials Degradation |
| title | Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying |
| title_full | Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying |
| title_fullStr | Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying |
| title_full_unstemmed | Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying |
| title_short | Study on the oxidation resistance mechanism of self-healable NiAl coating deposited by atmospheric plasma spraying |
| title_sort | study on the oxidation resistance mechanism of self healable nial coating deposited by atmospheric plasma spraying |
| url | https://doi.org/10.1038/s41529-023-00383-0 |
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