Evidence for a strong correlation between the amount of surface carbon and the tribological behaviour of ion-treated steels
Institut de Physique Nucléaire de Lyon, IN2P3-CNRS
F-69622 Villeurbanne Cedex, France
2 Centre Interdisciplinaire de Recherche avec les Ions Lourds (CIRIL), CEA-CNRS, BP 5133, F-14070 Caen Cedex 5, France
Accepted: 18 December 1997
Samples of 100Cr6-bearing steel were treated by different ion beams in order to study the evolution of their tribological properties. Complementary physico-chemical characterisation techniques give evidence for a strong correlation between the amount of surface carbon, whatever its origin (contamination, direct C implantation or ion beam mixing of a deposited carbon layer), and the reduction of the friction coefficient as well as the increase of the wear resistance. It is found that the friction coefficient is improved by a factor 5 and the wear volume by two orders of magnitude when the amount of surface carbon exceeds .
PACS: 81.40.Wx – Radiation treatment (particle and electromagnetic) / 81.40.Pq – Friction, lubrication, and wear / 61.82.Bg – Metals and alloys
© EDP Sciences, 1998