AVS 49th International Symposium
    Surface Engineering Tuesday Sessions
       Session SE+TF-TuA

Paper SE+TF-TuA7
Adhesion Fundamentals and Nanomechanics in Alumina-diamonds Nanocomposites

Tuesday, November 5, 2002, 4:00 pm, Room C-111B

Session: Systems Design of Functional Coatings
Presenter: M.V. Kireitseu, NAMATEX System Division, Institute of Machine Reliability, Russia
Authors: M.V. Kireitseu, NAMATEX System Division, Institute of Machine Reliability, Russia
L.V. Yerakhavets, NAMATEX System Division, Institute of Machine Reliability, Russia
I.A. Nemerenco, NAMATEX System Division, Institute of Machine Reliability, Russia
Correspondent: Click to Email
When alumina-based ceramic coatings are brought into contact with a ceramic, a polymer, or a metal, strong bond forces can develop between the materials. The bonding forces will depend upon the state of the surfaces, cleanliness and the fundamental properties of the two solids, both surface and substrate. Adhesion between alumina-based ceramic coatings and another solid are discussed from a theoretical consideration of the nature of the surfaces and experimentally by relating bond forces to the interface resulting from solid state contact. Surface properties of alumina-based ceramic composites correlated with adhesion include orientation, reconstruction, and diffusion as well as the chemistry of the surface specie. Where a ceramic is in contact with a metal their interactive chemistry and bond strength is considered. Substrate properties examined include elastic and plastic behavior in the surficial regions, cohesive binding energies, crystal structures, and crystallographic orientation. Materials examined with respect to interfacial adhesive interactions include alumina composite hardened by chrome carbide nanoparticles and diamonds nanoparticles and aluminum oxide. The surfaces of the contacting solids are studied both in the atomic or molecularly clean state and in the presence of selected surface contaminants.