AVS 49th International Symposium
    Surface Engineering Tuesday Sessions
       Session SE-TuP

Paper SE-TuP3
Three-dimensional Surface Structures Created by PVD Method

Tuesday, November 5, 2002, 5:30 pm, Room Exhibit Hall B2

Session: Poster Session
Presenter: I.G. Levchenko, Kharkov Aerospace University, Ukraine
Authors: I.G. Levchenko, Kharkov Aerospace University, Ukraine
M. Romanov, Kharkov Aerospace University, Ukraine
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We describe a new class of the plasma coatings namely the three-dimensional surface structures, as well as the technique of deposition and methods for calculating the main process parameters. These special films were produced with a view to increase a coating service life under the hard loading conditions, especially when fatigue endurance and wear resistance are the most critical factors. We created the real three-dimensional surface structures of a faceted multi-layer hard-ceramic film consisting of facets separated with the pure metal. As the hard-ceramic film, the titanium nitride and zirconium nitride composition was used. The mask technology was used for production of these structures. According to the concept proposed, the pure metal separator is used as a solid-state lubricant. Besides, the use of isolated hard-ceramic facets provides increased adhesion strength and adhesion fatigue limit; this enables deposition of relatively thick films (up to 40 micrometers) without loss of the adhesion stiffness, and prolongs the film service life before delamination. For deposition of these films, we used the molybdenum masks with various transparency factors and various facet shapes. The films were deposited using vacuum-arc deposition equipment that provides generation of the filtered ion flow free of droplets. The wear tests showed considerable increase in the wear-resistance and decrease in friction coefficient when the steel was used as the rider. For cylindrical sliding couple, the fatigue test was performed that had proved the efficiency and utility of this kind of technology.