Experimental Study of Bouncing Behavior of Spherical Sliders on Stationary Magnetic Disks

This paper presents experimental study of measuring dynamic contact force and meniscus force from the bouncing motion of hemispherical sliders on stationary magnetic disks. Two hemispherical sliders of 1.0mm and 2.0mm radii and test disks with 1, 2, 3 nm thick lubricants with/without UV treatment are used for the experiment. Typical data of displacement, velocity and acceleration of bouncing motion shows a clear adhesion force by formation of a meniscus bridge at the end of impact. It is found that the maximum contact force versus penetration depth can be estimated by Hertzian contact theory. The maximum dynamic adhesion force is close to the static meniscus force.