Résumé
While most of the works devoted to the synthesis of transition metal nitride coating by magnetron sputtering use N2 as reactive gas, an alternative method is proposed, namely using ammonia (NH3) as reactive gas. The magnetron sputtering of chromium in Ar/NH3 atmosphere is studied and compared to Ar/N2 atmosphere, with in situ (hysteresis curve, target voltage measurement, optical emission spectroscopy, deposition rate) and ex situ characterizations (XPS, XRD, SEM, RBS, UV–Vis, nanoindentation, 4-points probe). It appears that ammonia as a reactive gas influences the optical, electrical and mechanical properties as well as the microstructure of the thin films in a very similar way to HiPIMS with N2 reactive gas; improved mechanical properties are obtained, attributed to a change of the morphology, from columnar-like to nanocrystalline.
langue originale | Anglais |
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Numéro d'article | 144176 |
journal | Applied Surface Science |
Volume | 502 |
Les DOIs | |
Etat de la publication | Publié - 1 févr. 2020 |
Financement
The Synthesis Irradiation and Analysis of Materials (SIAM), PC 2 and MORPH-IM platforms of UNamur are acknowledged for XPS, XRD and SEM measurements. E.H. thanks Angel Martin Fernandez Alvarez for his help for UV-Vis measurements. A. N. acknowledges the Government of the Russian Federation through the ITMO Fellowship and Professorship program and to the French Ministry of Higher Education and Research for support through “Programme Hubert Curien – Kolmogorov”. Appendix A
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