Design of Nanocomposite Low-Friction Coatings (pages 1611–1616)
O. Wilhelmsson, M. Råsander, M. Carlsson, E. Lewin, B. Sanyal, U. Wiklund, O. Eriksson and U. Jansson
Article first published online: 30 MAY 2007 | DOI: 10.1002/adfm.200600724
Low-friction coatings are prepared with a new concept design using Ti1-xAlxC as a model system. Al is a weak carbide-forming element and an inherent driving force is established to segregate carbon. During contact, the carbon can be graphitized, which helps lower the friction. The friction coefficient can be lowered by more than 50 % for Al-containing TiC coatings without severe loss in mechanical characteristics (see figure).