Microstructure, mechanical and tribological properties of in situ MoB reinforced Cu-Al matrix composites. (January 2023)

• Record Type: Journal Article
• Authors: Wang, Shuai; Pang, Xianjuan; Xu, Yanjie; Lu, Huanhuan; Jiang, Peng; Yang, Jun; Liao, Zhiqian
• Is Part Of: Tribology international. Volume 177(2023)
• Publication Date: 2023-01
• Subjects: Cu matrix composite -- MoAlB -- Mechanical properties -- Tribological properties; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107941
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Herein, in situ MoB particles reinforced Cu-Al matrix composites are prepared by sintering the Cu and MoAlB mixture. During the sintering process, Al atoms can diffuse out of the layered MoAlB and solid-dissolve into the Cu matrix, resulting in the formation of laminate MoB and Cu-Al alloy. The mechanical properties of as-prepared composites are significantly improved because of multiple strengthening mechanisms. Moreover, the two-body abrasive and adhesive wear effects are inhibited on account of the pinning effect of MoB particles. With the MoAlB content increasing up to 20 wt% and 30 wt%, a layer of tribo-film can be generated due to the tribo-oxidation reaction during the sliding, which can provide lubrication to reduce friction and wear. Highlights: In-situ MoB reinforced Cu-Al matrix composites are prepared for the first time. The mechanical and tribological properties of as-prepared composites are improved. Two-body abrasion and adhesive wear can be inhibited with MoAlB addition. The generating tribo-film leads to the low friction coefficient and wear rate.