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ICMCTF - 2014
Corinna Sabitzer (C. Sabitzer)
Talk
"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 "
C. Sabitzer1, C. Steinkellner1, P. Polcik2, M. Arndt3, R. Rachbauer3, J. Paulitsch1,4, P. H. Mayrhofer1,4

1 Christian Doppler Laboratory for Application Oriented Coating Development at the Institute of Materials Science and Technology, Vienna University of Technology, 1040 Vienna, Austria
2 Plansee Composite Materials GmbH, 86983 Lechbruck am See, Germany
3 Oerlikon Balzers Coating AG, 9469 Balzers, Principality of Liechtenstein
4 Institute of Materials Science and Technology, Vienna University of Technology, 1040 Vienna, Austria
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, Al0.7Cr0.3N 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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2011 - 2017 - Christian Doppler Laboratory for Application Oriented Coating Development