Abstract
A small-sized CVD (chemical vapor deposition) equipment with simple structure was developed aiming at coating of DLC film on rubber. Tribological properties of some DLC film-coated-rubber were determined with a ball-on-disk type tribometer under unlubricated conditions, room temperature and a load of 1N. As a result, NBR coated by CVD method with DLC film showed a remarkable effect of friction reduction compared to NBR base material. On the other hand, NBR coated by PVD (physical vapor deposition) method was inferior in stability of friction coefficient to NBR coated by CVD. Both DLC film-coated urethane and PTFE were inferior in antiwear performance to NBR coated by CVD.
