| Autor: |
Hongzhi Yang, Xiaoya Li, Jianpeng Zou, Qian Shi, Mingjiang Dai, Changguang Deng, Pengbo Lyu |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Advanced Powder Materials, Vol 2, Iss 1, Pp 100059- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2772-834X |
| DOI: |
10.1016/j.apmate.2022.100059 |
| Popis: |
Ru-doped NiAlHf coatings were deposited on Ni-based single crystal substrate by arc ion plating technology. The failure mechanism and interfacial diffusion behavior were comparatively investigated with NiAlHf coating using scanning electron microscopy, electron probe micro-analyzer, and transmission electron microscopy. The results indicated that microstructure evolution of oxide scale induced by element diffusion process significantly affected oxidation resistance of NiAlHf/Ru coatings, resulting in formation of cracks and voids, thereby accelerating failure process. The precipitates in interdiffusion zone and secondary reaction zone of the substrate initiated by interfacial element diffusion were P phase and σ phase, respectively. And the discrepancy in content was elucidated from the perspective of thermodynamics and kinetics. Besides, microstructural evolution between NiAlHf/Ru coatings and substrate was also deliberated. The research could not only provide profound understanding of NiAlHf/Ru coatings failure mechanism, but also had significant guidance for suppressing precipitation of topological close-packed phases and facilitating development of single crystal Ni-based superalloys. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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