Influence of V content on properties of Ti–W–V–N films. (2nd January 2019)

• Record Type: Journal Article
• Authors: He, Sheng; Yu, Lihua; Ju, Hongbo; Geng, Yaoxiang; Asempah, Isaac; Xu, Junhua
• Is Part Of: Surface engineering. Volume 35:Number 1(2019)
• Page Start: 1
• Page End: 8
• Publication Date: 2019-01-02
• Subjects: Ti–W–V–N films -- microstructure -- mechanical properties -- tribological properties; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2018.1462607
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: Ti–W–V–N composite films with different vanadium contents were synthesised by multi-target reactive magnetron sputtering. The microstructure, mechanical and tribological properties of Ti–W–V–N films were investigated by X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, nanoindentation and high-temperature ball-on-disc tribometer. The results showed that all the Ti–W–V–N composite films were face-centred cubic (fcc) structure, consisting of fcc-(Ti, W, V)N substitutional solid solution. When the V content ≥21.5 at.-%, the films consisted of fcc-(Ti, W, V)N and fcc-VN. The hardness of the films first increased and then decreased with the maximum value of 32.4 GPa, at 21.5 at.-% V. The test temperature had a significant effect on the tribological properties of Ti–W–V–N film with 21.5 at.-% V, the coefficient of friction (CoF) first increased and then decreased, with a minimum value of 0.304 at 700°C.While the wear rate increased gradually with increasing temperature.