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Effects of Long Wavelength UV Irradiation on PFPE Molecular Bonding on CNx for Magnetic Recording Hard Disks



J Zhang, Stephen M. Hsu, T Y. Liew


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.
Tribology Letters


friction, lubricant bonding, magnetic hard disk, nanotribology, PFPE, UV irradiation, Z-Dol


Zhang, J. , Hsu, S. and Liew, T. (2021), Effects of Long Wavelength UV Irradiation on PFPE Molecular Bonding on CN<sub>x</sub> for Magnetic Recording Hard Disks, Tribology Letters (Accessed April 20, 2024)
Created October 12, 2021