The use of long wavelength UV irradiation (320 to 390 nm) to induce bonding of a perffluoropolyether (PFPEP on CNx disks has been successfully demonstrated. Disks with 100 % mobile molecules, 100% bonded molecules, and a 50:50 mixture of mobile and bonded molecules were prepared by dip-coating. These lubricant films were irradiated with a UV beam. Friction and wear measurements were performed on these disks using a Lateral Force Microscope, a diamond-tipped Atomic Force Microscope, and a ball-on-inclined plane test. Results suggested that the mobile PFPE performed better than the bonded one. The mixed lube gave the highest critical failure load as measured by a ball-on-inclined plane test.
Citation: Tribology Letters
Pub Type: Journals
friction, lubricant bonding, magnetic hard disk, nanotribology, PFPE, UV irradiation, Z-Dol