• TITLE: TRANSITION METAL NITRIDES: FORMATION AND CHARACTERIZATION
• AUTHOR(S): Stanislava Rabadzhiyska, Maria Ormanova, Dimitar Dechev, Nikolai Ivanov, Peter Petrov
• ABSTRACT: Transition metal nitrides- CrN, AlN and ZrN - were deposited by Direct Current Magnetron Sputtering (DCMS) technique. The CrN and AlN films were produced on W320 tool steel with preliminary treatment of electron-beam hardening and plasma nitriding. Their structure, mechanical and tribological characteristics (hardness, elasticity modulus and wear resistance) of the above mentioned coatings were assessed by means of X-Ray Diffraction, Nanoindentation tester and pin- on-disk method.The results exhibit a presence of face centered cubic CrN and hexagonal AlN phases. The hardness values are 19.6 GPa and 15.4 GPa for CrN and AlN layers, respectively. It was found out that the samples with deposited CrN coating possess higher wear resistance compared to one from AlN. Specimens of tool (X12MF) and Chromium-nickel (CrNi 321) steels were utilized at deposition of ZrN coatings. The diffractograms of these films show peaks of ZrN phase. The calculated lattice parameters are in agreement with ICDD (International center for date diffraction) database.
• PAGES: 12-
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