| AVS 55th International Symposium & Exhibition | |
| Tribology Focus Topic | Thursday Sessions |
| Session TR+SE+TF-ThM |
| Session: | Advances in Surface Engineering for Friction and Wear Control |
| Presenter: | B. Zhao, Northwestern University |
| Authors: | B. Zhao, Northwestern University Y.W. Chung, Northwestern University |
| Correspondent: | Click to Email |
Hydrogenated amorphous carbon films are known to attain ultra-low friction performance only in dry environments. Our work demonstrated that sulfur doping of hydrogenated carbon films results in ultra-low friction performance in both dry and humid environments. However, these films have a hardness of 7 - 10 GPa and an elastic modulus around 80 GPa, which are too low for some high stress applications. Formation of nanostructured coatings is known to improve hardness. With the aim to produce hard, low-friction coatings, we synthesized nanolayered and nanocomposite films of sulfur-doped hydrogenated carbon and titanium diboride using dual-target magnetron sputtering. Titanium diboride deposited by this method had a hardness >30 GPa. This paper will discuss the film structure and how such structure correlates with its tribological and mechanical properties.