Experimental Study of Collision Motion, Contact Force and Adhesion Force of Hemispherical Sliders with Stationary Magnetic Disks

Kyosuke ONO, Kenji NAKAGAWA
2005 Transactions of the Japan Society of Mechanical Engineers Series C  
In order to make clear the dynamic contact and adhesion forces of a magnetic head slider in near contact regime, we experimentally investigated the dynamic collision motion of hemispherical sliders on stationary magnetic disks. We used the hemispherical glass sliders of 1 and 2 mm in radius and the magnetic disks with different lubricant thickness of 0, 1, 2 and 3 nm with and without UV irradiation. As a result, we found that the dynamic adhesion forces of 1 and 2 mm radius sliders are almost
more » ... ual to their static meniscus forces. In the case of 1 mm radius slider and 3 nm thick lubricant without UV, the dynamic adhesion force increases significantly because of a squeeze film effect. The 2 mm radius slider does not show a clear dynamic adhesion force at an impact velocity larger than 1.5 mm/s. We also found that contact force can be estimated by Hertz contact theory.
doi:10.1299/kikaic.71.3575 fatcat:mak5iap6q5dxdnyeld4s62vacu