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MM: Fachverband Metall- und Materialphysik
MM 34: Poster Session
MM 34.15: Poster
Dienstag, 1. April 2014, 18:00–20:00, P4
In-situ high energy x-ray diffraction studies on the phase evolution during decomposition of arc evaporated (Ti,-Cr,-Al)N coatings — •Daniel M. Ostach1, Norbert Schell1, Andreas Schreyer1, Jens Birch2, Jeremy Schroeder2, Lina Rogström3, Matts P. Johansson-Jõeasaar4, and Rachid M'Saoubi4 — 1Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Max-Planck-Straße 1, 21502 Geesthacht — 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 are widely used in industrial applications, as in the case of coated metal cutting tools. During cutting, the coated tool is exposed to high temperatures and large forces. c-(Ti,Al)N decompose in two stages under such conditions; first a spinodal decomposition into coherent c-TiN and c-AlN rich domains followed by a second stage where c-AlN transforms to hexagonal (h)-AlN. Alloying of Cr in (Ti,Al)N coatings provide an additional decomposition route through the formation of intermediate c-(Al,Cr)N and c-(Ti,Cr)N ternary phases prior to the final stage when h-AlN and c-(Ti,Cr)N are formed. In effect, Cr in (Ti,Al)N has shown to delay the detrimental effect of h-AlN on the coating's hardness. In this study, in-situ high-energy synchrotron x-ray diffraction studies during annealing have been performed to study the phase evolution during decomposition of (Ti,Al,Cr)N coatings.