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V. Moraes, H. Bolvardi, S. Kolozsvári, H. Riedl, P.H. Mayrhofer:
"Thermal stability and mechanical properties of Ti-Al-B-N thin films";
Talk: Plansee Seminar 2017, Reutte; 2017-05-29 - 2017-06-02; in: "19th Plansee Seminar 2017", Plansee Seminar 2017 Proceedings, (2017), Paper ID HM 51, 11 pages.

The increasing demand in machining and drilling operations calls for new developments of protective coatings with outstanding properties. Meeting these challenging requirements, nitride based thin films have been well established and investigated.
In recent years, this development has led - from binary transition metal nitrides (e.g. TiN, CrN) - to multinary alloyed thin films. The oxidation resistance and high temperature hardness of TiN was significantly improved through the addition of Aluminium, to form supersatured c-Ti1-xAlxN thin films. These allow for age-hardening processes (via spinodally formed c-AlN domains) and the formation of protective Al2O3-containing oxide scales.
Here, we study the effect of Boron to further improve the already excellent thermal and mechanical properties of Ti1-xAlxN. Using reactive magnetron sputtering of B-alloyed Ti1-xAlx targets, detailed experimental investigations and Density Functional Theory, we study under which conditions cubic structured solid solutions form. Furthermore, important (and still unsolved is), under which conditions and to which content B substitutes for the metals (Ti and/or Al) or the nitrogen.

mechanical properties, thermal stability, multinary nitrides

Project Head Paul Heinz Mayrhofer:
Christian Doppler Labors für anwendungsorientierte Schichtentwicklung