Tribological Properties of Arc-Evaporated NbAlN Hard Coatings |
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| Authors: | R Franz M Lechthaler P Polcik M Rebelo de Figueiredo C Mitterer |
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| Affiliation: | (1) Christian Doppler Laboratory for Advanced Hard Coatings at the Department of Physical Metallurgy and Materials Testing, Montanuniversit?t Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria;(2) OC Oerlikon Balzers AG, Iramali 18, 9496 Balzers, Principality of Liechtenstein;(3) PLANSEE Composite Materials GmbH, Siebenb?rgerstrasse 23, 86983 Lechbruck am See, Germany |
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| Abstract: | Nb1−x
Al
x
N hard coatings were synthesised by cathodic arc-evaporation with different Al contents to study its influence on the tribological
properties. Ball-on-disc tests at temperatures up to 700 °C were performed and the recorded coefficient of friction was generally
in the range from 0.8 to 1.0. Subsequent analysis of the coating wear track and the counterpart wear scar by optical profilometry
and Raman spectroscopy revealed details on the wear behaviour of the tested coatings. The best wear performance for the Nb-rich
coatings was in the temperature range of 300–500 °C, whereas at the maximum testing temperature the higher oxidation resistance
with increasing Al content was beneficial in terms of wear resistance. |
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