Quaternary diborides—improving the oxidation resistance of TiB2 ± z coatings by disilicide alloying
| Autor: | Ahmed Bahr, Oskar Beck, Thomas Glechner, Alexander Grimmer, Tomasz Wojcik, Philip Kutrowatz, Jürgen Ramm, Oliver Hunold, Szilard Kolozsvári, Peter Polcik, Eleni Ntemou, Daniel Primetzhofer, Helmut Riedl |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 11, Iss 9, Pp 733-741 (2023) |
| Druh dokumentu: | article |
| ISSN: | 21663831 2166-3831 |
| DOI: | 10.1080/21663831.2023.2225554 |
| Popis: | To overcome the limited oxidation resistance of the emerging class of transition metal borides, we suggest within this study novel quaternary diborides, Ti-TM-Si-B2 ± z (TM = Ta, Mo), achieving the compromise between excellent oxidation resistance and requirements of hard coatings. Single-phase AlB2-type structured Ti-TM-Si-B2 ± z films (3–5 µm) are sputter-deposited from TiB2/TMSi2 targets. The Ti-Ta-Si-B2 ± z coatings exhibit 36 GPa in hardness, while maintaining strongly retarded oxidation kinetics till 1000°C. Ti-Mo-Si-B2 ± z coatings preserve a hardness up to 27 GPa, although outperforming all their counterparts by featuring outstanding oxidation resistance with 440 nm oxide scale thickness after 1 h at 1200°C. |
| Databáze: | Directory of Open Access Journals |
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