IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Tribology Wednesday Sessions
       Session TR+SS-WeM

Paper TR+SS-WeM10
A Study of Triboelectricity on Dielectric Surfaces by Measuring Electric-discharge Luminescence during Friction

Wednesday, October 31, 2001, 11:20 am, Room 132

Session: Fundamentals of Tribology & Adhesion
Presenter: T. Miura, Gakushuin University, Japan
Authors: T. Miura, Gakushuin University, Japan
I. Arakawa, Gakushuin University, Japan
Correspondent: Click to Email
Triboluminescence during friction between a spherical surface and a flat surface of dielectrics, i.e., a typical pin-on-disk technique, was observed by a spectrometer and an optical microscopy. Spectrum measurement of the luminescence in ambient air made it clear that electric discharge occurs around a contact point. To investigate a relation between the electric discharge and triboelectricity the luminescent intensity distribution along the sliding direction was measured using the microscope with only UV-translucent filter. In short, the breakdown characteristics depending on the gap distance was aimed. When it is assumed that the UV distribution indicates electric discharge currents at each gap distance, the distribution is accounted for a well-known equation of semi-empirical discharge-current. As a result, voltage between the both sides was evaluated. Then the surface charge density at immediately after the friction in several ms was shown. We believe this is innovative technique to evaluate electric potential difference of triboelectricity between dielectric surfaces. In this conference we will present our experimental results, methods, analysis, and discussions in detail.