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

Paper SE-TuP2
Optimum Combination of Surface Roughness for Materials with Smooth Sliding in a Vacuum

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

Session: Poster Session
Presenter: A. Kasahara, Nanomaterial Laboratory, Japan
Authors: A. Kasahara, Nanomaterial Laboratory, Japan
M. Goto, Nanomaterial Laboratory, Japan
T. Oishi, Nanomaterial Laboratory, Japan
M. Tosa, Nanomaterial Laboratory, Japan
Correspondent: Click to Email
We used a probe of stainless steel sphere with surface roughness of 60nm, and we measured friction of stainless steel substrate which with surface roughness prepared on a submicron scale. As a result, the materials with about 100nm surface roughness showed same friction force in a vacuum as the force out as atmospheric pressure. However, frictional force is generated by relative movement between materials. Therefor we studied a difference of surface roughness of probe and form of surface roughness of a sample in order to obtain the most optimum combination condition for smooth sliding in a vacuum.We measured frictional force of stainless steel sheet surface roughness of 110nm by probes with diameter of 3.18mm and with surface roughness of 60nm,100nm and 200nm. we also used titanium and copper sheets with surface roughness polished on a submicron scall and studied relation between a direction of sliding and generated friction force. The results showed decrease in friction force under optimum combination conditions that surface roughness of substrate was smaller than that of probe with surface roughness of about 100nm and that surface grove line patterns of sliding probe and substrate cross each other at right angles.