The effects of double ceramic particles (B4C-SiC) on the performance, microstructure, and friction-wear mechanisms of copper-based PM. (November 2022)

• Record Type: Journal Article
• Authors: Wu, Jiaqi; Li, Zhuan; Luo, Yong; Li, Ye; Gao, Zonglong; Zhao, Yibo; Wu, Cuiwei; Liao, Yanxia; Jin, Min
• Is Part Of: Tribology international. Volume 175(2022)
• Publication Date: 2022-11
• Subjects: Double ceramic particles (B4C-SiC) -- Wear mechanism -- B2O3 tribo-film -- Copper-based PM; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107865
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The copper-based powder metallurgy reinforced by double ceramic particles (B4 C-SiC) were prepared by powder metallurgy route and the self-made carbon-ceramic composite was used as the friction disc. The effects of different proportions B4 C-SiC on performance, microstructure, and friction-wear mechanisms were examined. The result reveals that the presence of SiC (less 3%) in B4 C-SiC has great promotion effect on mechanical-properties, but small weakened effect on thermal-performance. The main factor affecting the friction-performance at low-speed is SiC, while is B4 C at high-speed. With the ratio of SiC/B4 C increases, the formation of B2 O3 -tribo-film experiences a change of first-decreased, then-increased, and finally-disappeared. While wear-mechanism experiences the transition stage from abrasive wear to slight fatigue wear, abrasive wear, severe fatigue wear, and adhesive wear, respectively. Highlights: The friction behavior of B4 C-SiC-Cu-based PM mated with C/C–SiC was investigated. B4 C-SiC has different effects on physical, thermal, and friction properties. S3 copper-based PM (3%SiC-5%B4 C) obtains more excellent performance. The main factor affecting the friction properties at low speed is SiC, while is B4 C at high speed. The relationship between formation of B2 O3 tribo-film and wear mechanism was explored.