Scratch test measurements on CrNx coatings

HOY, R., VAN ESSEN, P., KAMMINGA, J. D., JANSSEN, G. C. A. M. and EHIASARIAN, Arutiun (2004). Scratch test measurements on CrNx coatings. In: COCORAN, Sean G., JOO, Y.-C., MOODY, N.R. and SUO, Z., (eds.) Thin Films: Stresses and Mechanical Properties X ; proceedings. Materials Research Society symposium proceedings (795). Materials Research Society, 491-496.

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Abstract

Hard CrNx coatings of various composition were deposited on hot work tool steel by means of reactive sputter deposition in an industrial PVD reactor. All deposited coatings (thickness 3-4 micron) were under compressive stress. The coatings were subjected to scratch testing with a diamond stylus. Two critical loads were determined. The first critical load, Lc1, indicates the onset of chipping and/or spalling. The second critical load, Lc2, indicates complete coating removal inside the track. Micrographs showing the coating failure are presented. Stoichiomeric CrN coatings outperform understoichiometric CrN0.6 coatings in scratch tests. It was found that for all specimens the coating-to-substrate adhesion is very good, independent on composition. Although the values of Lc1 and Lc2 are distinctly different, their dependence on composition is similar.

Item Type: Book Section
Additional Information: From the 2003 MRS Fall Meeting; Boston, MA; USA; 1-5 Dec. 2003.
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Depositing User: Arutiun Ehiasarian
Date Deposited: 14 Sep 2011 14:32
Last Modified: 14 Sep 2011 14:32
URI: http://shura.shu.ac.uk/id/eprint/2469

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