INFLUENCE OF THE MECHANICAL PROPERTIES ON THE WEAR BEHAVIOR OF a-C FILMS: AN ENERGY DESCRIPTION

An energy dissipation model was raised, including the influence of film properties, counterpart, contact stress and adhesion strength between film and substrate. A new plastic deformation-tendency index was introduced. The new index was more appropriate in predicting the wear behavior of a-C films than hardness and H/E. Particularly, the critical value of the new index existed for film failure in the friction test. Realizing the limitation of the model, some improvement directions of the model were also discussed in this study.

Large Area Coatings for Architectural Glass – Design, Manufacturing, Process Faults

ABSTRACTThe physical properties of architectural sputtered coatings are considered in the context of their design, manufacture, transport and processing. The design constraints of high optical and thermal performance lead to the use of thin metal layers in interference coating stacks. This, in turn, determines the chemical and mechanical property challenges. In-service examples of film failure are presented along with practical countermeasures. Laboratory methods for ranking development coating systems are also discussed.