Achieving the excellent self-lubricity and low wear of TiAl intermetallics through the addition of copper coated graphite. (1st October 2020)

• Record Type: Journal Article
• Authors: Wang, Long; Tieu, Anh Kiet; Zhu, Qiang; Chen, Jiao; Cheng, Jun; Yang, Jun; Kosasih, Buyung
• Is Part Of: Composites. Number 198(2020)
• Publication Date: 2020-10-01
• Subjects: TiAl intermetallics -- Self-lubricity -- Wear -- Copper coated graphite; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2020.108223
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: The present work achieves excellent lubricity and low wear of TiAl intermetallics by the addition of low-cost copper-coated graphite. 50% reduction of friction and more than one magnitude lower wear rate were obtained. This superior tribological property is attributed to the formation of a soft tribo-film and a synergetic effect of in-situ formed harder TiC reinforcement. This tribo-film contains some graphite nanoplatelets, shell-like carbon, TiC particles and the mixture of some oxides. This work is helpful not only for the development of new solid self-lubricating composites but also promotes a scientific understanding of the tribo-film of solid lubricants.