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PSE 2014 - 2014
Corinna Sabitzer (C. Sabitzer)
"Investigation on the diffusion behaviour of Fe, Cr, and C in arc evaporated TiN- and CrN-based coatings and their influence on the thermal and mechanical properties"
Corinna Sabitzer1, Christian Steinkellner1, Peter Polcik2, Mirjam Arndt3, Richard Rachbauer3, Jörg U. Paulitsch1, Paul H. Mayrhofer1
1TU Wien, Vienna, Austria, 2Plansee Composite Materials GmbH, Lechbruck am See, Germany, 3Oerlikon Balzers Coating AG, Balzers, Liechtenstein
Hard materials like CrN, TiN, CrAlN, and TiAlN are well established as
protective coatings for tools used in various machining and forming
applications. Even though the thermal stability and thermo-mechanical
properties of such coatings have already been investigated in numerous
studies only little information is available concerning the influence of
transfer-material-diffusion during e.g. machining applications. Therefore,
thin layers of Fe, Cr, and C ? which are common transfer-elements during
machining ? were deposited on arc evaporated CrN, TiN, Al
0.7Cr0.3N as well as on Ti0.5Al0.5N coatings. The concentration-depth profiles after vacuum annealed for 30 min at 600, 800, and 1000 °C were evaluated by
cross-sectional EDX line-scans as well as by secondary ion mass
spectroscopy. Additional to the determination of the diffusion coefficients at
high temperatures, low temperature annealing treatments at 600 °C for 10,
100, and 1000 min were carried out to investigate in more detail the
in-depth diffusion behaviour of Fe, Cr, and C. These results serve as a basis
for a better understanding of the complex interaction between coated tool
and work-piece as well as the influence of impurities on the thermal and
mechanical behaviour of ceramic-like protective coatings.

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