Friction and wear behaviour of selected titanium and zirconium based nitride coatings in Na2SO4 aqueous solution under low contact pressure. (November 2015)

• Record Type: Journal Article
• Authors: Pejaković, Vladimir; Totolin, Vladimir; Göcerler, Hakan; Brenner, Josef; Rodríguez Ripoll, Manel
• Is Part Of: Tribology international. Volume 91(2015)
• Page Start: 267
• Page End: 273
• Publication Date: 2015-11
• Subjects: Tribocorrosion -- Friction -- Wear -- Coatings; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2015.04.047
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The low contact pressure friction and wear behaviour of four titanium and zirconium-based nitride coatings were investigated in Na2 SO4 electrolyte. The experiments were performed using two different potentiostatic conditions, namely OCP and 0.5 V. For all selected potentials, zirconium-based nitride coatings showed an enhanced wear resistance, when compared to titanium-based coatings. This improved wear performance is due to the formation of stable oxide layers for the selected loading conditions, resulting in low and steady friction. Alternatively, titanium-based coatings were more prone to wear accelerated corrosion, which yielded a high and unstable coefficient of friction accompanied by significantly higher wear. Highlights: Tribocorrosion investigations of nitride coatings at small contact loads. Fundamental differences found on tribocorrosion performance of nitride coatings. Zirconium-based coatings are found to have an excellent tribocorrosion resistance. Formation of a relatively thick (200 nm) stable oxide layer in zirconium coatings.