Session K9 - Tribology II: Energy Dissipation & Sliding Mechanisms.
MIXED session, Wednesday morning, March 22
102D, MCC
Results of an experimental study of triboemission - the emission of charged particles from rubbing surfaces - are presented with an emphasis on tribochemical effects, in particular tribopolymerization as a mechanism of boundary lubrication. In this concept, proposed by Furey and Kajdas [1], triboemitted charged-particles (e.g., low-energy electrons) initiate the surface polymerization of addition-type monomers.
A new instrument for measuring the burst-type triboemission is described [2]. Experimental results are presented for the sliding contact of diamond on the three related materials - alumina, sapphire and aluminum - and for the sliding contact of alumina-on-alumina. Features of the triboemission intensity for negatively and positively-charged emission as a function of retarding potential are discussed. A stochastic model is proposed to characterize the triboemission data in the frequency domain.
[1] Furey,M.J., Kajdas,C., Models of Tribopolymerization as an Anti-Wear Mechanism, Proc.Jap.Intl.Trib.Conf., 1990, 1089-1094. [2] Furey,M.J., Ritter,A.L., Vick,B., Molina,G.J., Kajdas,C., Triboemission and Surface Temperatures Generated in a Ball-in-Cone Tribocontact, Proc.5th Intl.Trib.Conf. AUSTRIB'98, Dec.6-9, 1998, Brisbane, Australia, 257-262.