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.

通过添加低成本的覆铜石墨，本工作实现了TiAl金属间化合物的优异润滑性和低磨损。获得了50％的摩擦降低和更低的磨损率一倍以上。这种优异的摩擦学性能归因于软摩擦膜的形成以及原位形成的较硬TiC增强材料的协同作用。该摩擦膜包含一些石墨纳米片，壳状碳，TiC颗粒以及一些氧化物的混合物。这项工作不仅有助于新型固体自润滑复合材料的开发，而且有助于增进对固体润滑剂摩擦膜的科学理解。