The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C
The AlCoCrFeNi high entropy alloy bond coating was prepared by atmospheric plasma spray. The growth process and failure behavior of the thermally grown oxide (TGO) layer during the oxidation of the AlCoCrFeNi bond coating at 900–1000 °C were investigated. Results show that the AlCoCrFeNi bond coatin...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423021944 |
| _version_ | 1797646649108987904 |
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| author | Xiao Zhang Nannan Zhang Min Liu Chunming Deng Chao Wang Shuo Yin |
| author_facet | Xiao Zhang Nannan Zhang Min Liu Chunming Deng Chao Wang Shuo Yin |
| author_sort | Xiao Zhang |
| collection | DOAJ |
| description | The AlCoCrFeNi high entropy alloy bond coating was prepared by atmospheric plasma spray. The growth process and failure behavior of the thermally grown oxide (TGO) layer during the oxidation of the AlCoCrFeNi bond coating at 900–1000 °C were investigated. Results show that the AlCoCrFeNi bond coating generates a protective TGO layer composed of Al2O3 at 900–1000 °C, which effectively reduces the oxidation rate of the coating. The oxidation kinetic curves of the AlCoCrFeNi coating at 900–1000 °C exhibited a parabolic pattern. Until 50h oxidation, the TGO layer at 900 °C remained complete. In contrast, the TGO layer exfoliated at 1000 °C, associated with the thermal mismatch stress between the TGO layer and the AlCoCrFeNi coating. The growth of the TGO layer is primarily controlled by the outward diffusion of Al ions, which causes the generation of Al ion vacancies within the coating, consequently developing into visible pores. The presence of pores exacerbates the possibility of TGO layer exfoliation. The control of the outward diffusion process of Al ions, which can reduce the growth rate of the TGO layer and the amount of pores in the coating, is an important idea to improve the oxidation resistance of AlCoCrFeNi coating. |
| first_indexed | 2024-03-11T15:04:43Z |
| format | Article |
| id | doaj.art-693ae86605cc485c84339a9e93ca7cc0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:04:43Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-693ae86605cc485c84339a9e93ca7cc02023-10-30T06:04:29ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012668076822The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °CXiao Zhang0Nannan Zhang1Min Liu2Chunming Deng3Chao Wang4Shuo Yin5Department of Material Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, ChinaDepartment of Material Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China; Corresponding author.Institute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong 510651, ChinaInstitute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong 510651, ChinaInstitute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong 510651, China; Corresponding author.Department of Mechanical, Manufacturing & Biomedical Engineering, Trinity College Dublin, The University of Dublin, Parsons Building, Dublin 2, Ireland; Corresponding author.The AlCoCrFeNi high entropy alloy bond coating was prepared by atmospheric plasma spray. The growth process and failure behavior of the thermally grown oxide (TGO) layer during the oxidation of the AlCoCrFeNi bond coating at 900–1000 °C were investigated. Results show that the AlCoCrFeNi bond coating generates a protective TGO layer composed of Al2O3 at 900–1000 °C, which effectively reduces the oxidation rate of the coating. The oxidation kinetic curves of the AlCoCrFeNi coating at 900–1000 °C exhibited a parabolic pattern. Until 50h oxidation, the TGO layer at 900 °C remained complete. In contrast, the TGO layer exfoliated at 1000 °C, associated with the thermal mismatch stress between the TGO layer and the AlCoCrFeNi coating. The growth of the TGO layer is primarily controlled by the outward diffusion of Al ions, which causes the generation of Al ion vacancies within the coating, consequently developing into visible pores. The presence of pores exacerbates the possibility of TGO layer exfoliation. The control of the outward diffusion process of Al ions, which can reduce the growth rate of the TGO layer and the amount of pores in the coating, is an important idea to improve the oxidation resistance of AlCoCrFeNi coating.http://www.sciencedirect.com/science/article/pii/S2238785423021944Atmospheric plasma sprayThermal barrier coatingsHEA bond coatingHigh temperature oxidationThermally grown oxide |
| spellingShingle | Xiao Zhang Nannan Zhang Min Liu Chunming Deng Chao Wang Shuo Yin The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C Journal of Materials Research and Technology Atmospheric plasma spray Thermal barrier coatings HEA bond coating High temperature oxidation Thermally grown oxide |
| title | The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C |
| title_full | The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C |
| title_fullStr | The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C |
| title_full_unstemmed | The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C |
| title_short | The failure behavior of thermally grown oxide of the AlCoCrFeNi bond coating prepared by atmospheric plasma spray at 900–1000 °C |
| title_sort | failure behavior of thermally grown oxide of the alcocrfeni bond coating prepared by atmospheric plasma spray at 900 1000 °c |
| topic | Atmospheric plasma spray Thermal barrier coatings HEA bond coating High temperature oxidation Thermally grown oxide |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423021944 |
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