Influence of the Cu addition on the tribological properties of HVOF sprayed bimodal WC-Co coating. (12th December 2018)

• Record Type: Journal Article
• Authors: Mi, Pengbo; Ye, Fuxing
• Is Part Of: Materials research express. Volume 6:Number 3(2019)
• Publication Date: 2018-12-12
• Subjects: high-velocity oxygen-fuel (HVOF) -- bimodal WC-Co coating -- Cu doping -- tribological properties; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aadc52
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In this study, the bimodal WC-Co coatings with different Cu doping content were prepared using high-velocity oxygen-fuel (HVOF). The composition, microstructure and wear performance have been investigated. The results show that the Cu-doped WC-Co coatings consist of WC, W2 C and Cu. With the increase of the Cu doping content, the hardness first increases and then decreases. The maximum value is 1254.78 ± 66 HV0.1 when the Cu doping content is 4 wt%. The average friction coefficient and wear rate first decrease and then increase with the increasing Cu doping content. The minimum friction coefficient and wear rate are obtained at the 4 wt% doping content, the values are 0.47 ± 0.021 and 3.38 ± 0.25 × 10 −6 mm 3 · N −1 · mm −1, respectively. The Cu embedded in the coating can form a thin self-lubricating Cu film.