Microstructure and tribological properties of laser-cladded Co-Ti3SiC2 coating with Ni-based interlayer on copper alloy. (July 2022)

• Record Type: Journal Article
• Authors: Lu, Shisheng; Wang, Lingqian; Zhou, Jiansong; Liang, Jun
• Is Part Of: Tribology international. Volume 171(2022)
• Publication Date: 2022-07
• Subjects: Laser cladding -- Co-based composite coating -- Wear resistance -- Ti3SiC2; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107549
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The Co-Ti3 SiC2 coating with Ni-based interlayer has been manufactured on copper alloy via laser cladding. The effect of Ti3 SiC2 doping on the microstructure, microhardness and tribological behavior of Co-based coating is investigated. Results revealed that the microhardness of the Co-based coating increased from 426.22 HV0.2 to 524.40 HV0.2 with the increase of Ti3 SiC2 content due to the solid solution strengthening of γ-Co and second phase strengthening of Cr23 C6, SiC and TiC. The Co-10 wt% Ti3 SiC2 coating has the lowest mean friction coefficient of 0.356 and wear rate of 0.16 × 10 −5 mm 3 /(N·m) at 600 °C. The addition of 20 wt% Ti3 SiC2 deteriorates the anti-wear properties of the Co-based coating and causes the largest mean friction coefficient of 0.47 and wear rate of 10.26 × 10 −5 mm 3 /(N·m) at 600 °C. Highlights: The Co-Ti3 SiC2 composite coatings were successfully fabricated on copper alloy. Ni-based interlayer improved the incompatibility of Co-Cu and the laser absorptivity of Cu alloy. Ti3 SiC2 enhances the hardness and mechanical properties of Co-based coatings. The Co-based coating with addition of 10 wt% Ti3 SiC2 shows improved RT and HT wear resistance.