Tribological and mechanical properties of ultrananocrystalline diamond/amorphous carbon composite films

摘要

The nucleation density, however, has no distinct influence on the mechanical properties, like microhardness, elastic modulus and adhesion, of the closed films. The presence of amorphous matrix in the composite films although reducing the hardness may be of advantage by improving their toughness and can help to prevent fatal brittle failure. The results of the nano scratch tests reveal the protecting nature of the coatings on the underlaying substrate.