Extreme operating conditions have high requirement for the performance of key component's coatings. As a common coating, thin diamond-like carbon(DLC) films cannot meet the increasing performance requirements due to the limited thickness. Therefore, developing preparation technology of ultra-thick DLC films has practical significance in researching. Multilayer Ti-doped DLC films were prepared by the deposition technology of double bend-tube magnetic filter cathode vacuum arc. Vickers hardness tester, fricti...