Thermal Behavior of Frictional Properties on Ultra-Thin Perfluoropolyether Lubricant Film

Roughness of Thin Perfluoropolyether Lubricant Films: Influence on Disk Drive Technology

In disk drive technology, lubricant thickness and roughness are important, but often overlooked, contributors to slider–disk spacing. In this paper, we use X-ray reflectivity to measure the thickness and lubricant–air roughness of a perfluoropolyether lubricant (Fomblin Zdol) on silicon wafers and carbon overcoats. For Zdol on smooth silicon, the roughness increases with increasing lubricant th...

Triboelectric charging of a perfluoropolyether lubricant

Perfluoropolyethers ~PFPE! are used extensively to lubricate hard disks for high density information storage. Some PFPE lubricants have been shown to be vulnerable to dissociative electron attachment as well as electron bombardment. Triboelectric charges generated during sliding contact may generate quasi-free electrons capable of degrading the lubricant. We describe measurements of triboelectr...

Ultra-thin Graphitic Film: Synthesis and Physical Properties

A scalable technique of chemical vapor deposition (CVD) growth of ultra-thin graphitic film is proposed. Ultra-thin graphitic films grown by a one-step CVD process on catalytic copper substrate have higher crystallinity than pyrolytic carbon grown on a non-catalytic surface and appear to be more robust than a graphene monolayer. The obtained graphitic material, not thicker than 8 nm, survives d...

Anomalous Frictional Behavior in Collisions of Thin

We report collision experiments with Delrin disks and a steel plate. The disks floated air table, and collided at low speeds with a thick plate clamped to the table. The collisio was varied. The observed normal restitution was consistent with other studies. The fri interaction di ered from that reported for spheres and thick disks, and from predict standard rigid-body collision models. For ‘sli...

The Frictional Behavior of Thin Halide Films on Iron