Regensburg 2016 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
DS: Fachverband Dünne Schichten
DS 28: Thin Film Applications
DS 28.3: Talk
Wednesday, March 9, 2016, 10:15–10:30, H8
Oxidation behaviour of arc evaporated (Ti,Cr,Al)N coatings studied by SR-XRPD — •Daniel Michael Ostach1, Norbert Schell1, Andreas Schreyer1, Jens Birch2, Jeremy Schroeder2, Lina Rogström3, Chen Yu-Hsiang3, and Mats Johannson-Joesaar4 — 1Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung, 21502 Geesthacht, Germany — 2Thin film physics, IFM, Linköping University, 581 83 Linköping, Sweden — 3Nanostructured materials, IFM, Linköping University, 581 83 Linköping, Sweden — 4SECO Tools AB, Fagersta, Sweden
Hard and wear resistant cubic (c)-(Ti,Al)N based coatings have many applications, such as protection of the underlying bulk material and improved wear resistance. In the cutting tool industry, the improved wear resistance increases the lifetime of the coated tools. The mechanical properties of TiAlN deteriorates at high temperatures due to formation of the hexagonal (h) AlN phase, while by alloying of Cr in (Ti,Al)N coatings the detrimental effect of h-AlN on the mechanical properties can be reduced. Further, the oxidation resistance of CrAlN coatings is improved compared to that of TiAlN, thus, a TiCrAlN coating could be expected to have both, high oxidation resistance and high mechanical properties. In this study, in-situ high-energy synchrotron radiation x-ray powder diffraction (SR-XRPD) during annealing in an air atmosphere has been performed to study the oxidation process of TiCrAlN. The results reveal that the oxidation behavior changes with Al-content and Ti-content and TiCrAlN with low Ti-content show a higher oxidation resistance.