Abstract
Mechanical properties of hard coatings are usually characterized by nano-indentation, scratch-test and ball-on-disk friction-test. However, the durability of the hard coatings under practical usage sometimes does not coincide the results of these tests. Development of a new method which can evaluate their durability under practical usage is expected. We proposed a new friction test for evaluating the durability of hard coatings in the last spring meeting, which utilized the friction welding apparatus. One of the problems of this method was that the load is too high for our purpose. In this work, we have used a new apparatus which can lighten the friction load, and evaluated the durability of a DLC film.
