| Autor: |
Andreas Leineweber, Max Fischer, Stefan Kante, Stefan Martin |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Metals, Vol 12, Iss 4, p 619 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2075-4701 |
| DOI: |
10.3390/met12040619 |
| Popis: |
Nitriding of Fe-1 wt.% Cu and Fe-5 wt.% Cu alloys at 813 K leads to the formation of predominantly the γ′-iron nitride phase (γ′-Fe4N) when using nitriding conditions, which lead to pronounced formation of ε-iron nitride phase (ε-Fe3N1+x) upon nitriding of pure α-Fe. Energy dispersive X-ray analysis reveals that the developing γ′ can attain a Cu content corresponding to that of the base material. In contrast, tiny amounts of ε-nitride that eventually develop contain considerably less Cu. The microstructure implies that the formation of the ε-nitride requires long-range substitutional interdiffusion to achieve the Cu partitioning. These observations were interpreted in terms of a significantly higher solubility of Cu in the γ′ phase than in the ε phase, which is explainable by the phases’ crystal structures. The observations were rationalized in terms of schematic Fe–Cu–N phase diagrams valid for 813 K. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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