High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating
In this paper, TWL12 + TWL20 inorganic salt aluminum coating was sprayed on the surface of Ni-based P/M superalloy. The microstructure changes of inorganic salt aluminum coating and P/M superalloy after high temperature oxidation at 700, 750 ℃ and 800 ℃ were studied by XRD, SEM, EPMA and TEM. The re...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2023-10-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000003 |
| _version_ | 1797663571319980032 |
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| author | LI Jialin YANG Jie MU Chunhui JIANG Guojie LIU Guangxu WANG Xiaofeng ZOU Jinwen |
| author_facet | LI Jialin YANG Jie MU Chunhui JIANG Guojie LIU Guangxu WANG Xiaofeng ZOU Jinwen |
| author_sort | LI Jialin |
| collection | DOAJ |
| description | In this paper, TWL12 + TWL20 inorganic salt aluminum coating was sprayed on the surface of Ni-based P/M superalloy. The microstructure changes of inorganic salt aluminum coating and P/M superalloy after high temperature oxidation at 700, 750 ℃ and 800 ℃ were studied by XRD, SEM, EPMA and TEM. The results show that after high temperature oxidation, the surface structure of the coating peels off, and the aluminum in the coating diffuses with the substrate to form a transition layer composed of oxidation zone, diffusion layer and interdiffusion zone. The oxidation zone is the outermost layer, where is mainly enriched with O and Al elements to form Al2O3 layer. The diffusion layer mainly contains Ni and Al elements, forming NiAl phase and α-Cr phase dispersed in it. Finally, the interdiffusion zone rich in Ti, Cr, Co, Ta and other elements exists between the diffusion zone and the matrix, which is mainly composed of Ni2AlTi phase matrix and σ phase dispersed in it. The analysis shows that the thickness of transition layer changes with the increase of oxidation temperature, it is mainly manifested by the increase of the width of the interdiffusion zone, the increase of the size of α-Cr phase in the diffusion layer and σ phase in the interdiffusion zone, and the growth trend of σ phase along the vertical transition zone is intensified. The oxidation weight gain curve shows that the transition layer exhibits good oxidation resistance during high temperature oxidation at 750 ℃ and 800 ℃ after the surface structure of the coating falls off, it indicates that the TWL12 + TWL20 inorganic salt aluminum coating has the potential to provide high temperature oxidation coating protection for advanced P/M superalloy used in aeroengines. |
| first_indexed | 2024-03-11T19:16:36Z |
| format | Article |
| id | doaj.art-e0f07263f648460bb8557c3b16f247fb |
| institution | Directory Open Access Journal |
| issn | 1005-5053 |
| language | zho |
| last_indexed | 2024-03-11T19:16:36Z |
| publishDate | 2023-10-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-e0f07263f648460bb8557c3b16f247fb2023-10-09T08:50:06ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50532023-10-01435677510.11868/j.issn.1005-5053.2023.000003a2023-0003High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coatingLI Jialin0YANG Jie1MU Chunhui2JIANG Guojie3LIU Guangxu4WANG Xiaofeng5ZOU Jinwen6Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Materials, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Materials, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaIn this paper, TWL12 + TWL20 inorganic salt aluminum coating was sprayed on the surface of Ni-based P/M superalloy. The microstructure changes of inorganic salt aluminum coating and P/M superalloy after high temperature oxidation at 700, 750 ℃ and 800 ℃ were studied by XRD, SEM, EPMA and TEM. The results show that after high temperature oxidation, the surface structure of the coating peels off, and the aluminum in the coating diffuses with the substrate to form a transition layer composed of oxidation zone, diffusion layer and interdiffusion zone. The oxidation zone is the outermost layer, where is mainly enriched with O and Al elements to form Al2O3 layer. The diffusion layer mainly contains Ni and Al elements, forming NiAl phase and α-Cr phase dispersed in it. Finally, the interdiffusion zone rich in Ti, Cr, Co, Ta and other elements exists between the diffusion zone and the matrix, which is mainly composed of Ni2AlTi phase matrix and σ phase dispersed in it. The analysis shows that the thickness of transition layer changes with the increase of oxidation temperature, it is mainly manifested by the increase of the width of the interdiffusion zone, the increase of the size of α-Cr phase in the diffusion layer and σ phase in the interdiffusion zone, and the growth trend of σ phase along the vertical transition zone is intensified. The oxidation weight gain curve shows that the transition layer exhibits good oxidation resistance during high temperature oxidation at 750 ℃ and 800 ℃ after the surface structure of the coating falls off, it indicates that the TWL12 + TWL20 inorganic salt aluminum coating has the potential to provide high temperature oxidation coating protection for advanced P/M superalloy used in aeroengines.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000003twl12+twl20 inorganic aluminum coatingni-based p/m superalloyhigh temperature oxidationmicrostructure |
| spellingShingle | LI Jialin YANG Jie MU Chunhui JIANG Guojie LIU Guangxu WANG Xiaofeng ZOU Jinwen High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating Journal of Aeronautical Materials twl12+twl20 inorganic aluminum coating ni-based p/m superalloy high temperature oxidation microstructure |
| title | High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating |
| title_full | High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating |
| title_fullStr | High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating |
| title_full_unstemmed | High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating |
| title_short | High temperature oxidation microstructure analysis of Ni-based P/M superalloy coated with an inorganic aluminum coating |
| title_sort | high temperature oxidation microstructure analysis of ni based p m superalloy coated with an inorganic aluminum coating |
| topic | twl12+twl20 inorganic aluminum coating ni-based p/m superalloy high temperature oxidation microstructure |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000003 |
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