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Molecular Dynamics Simulation of the Evaporation and Transfer of the Lubricant on a Hard Disk in Heat-Assisted Magnetic Recording

[+] Author Affiliations
M. Ashraful Haq, Shao Wang, Zhencheng Ren, Yalin Dong

University of Akron, Akron, OH

Paper No. ISPS-MIPE2018-8533, pp. V001T01A004; 3 pages
doi:10.1115/ISPS-MIPE2018-8533
From:
  • ASME-JSME 2018 Joint International Conference on Information Storage and Processing Systems and Micromechatronics for Information and Precision Equipment
  • ASME-JSME 2018 Joint International Conference on Information Storage and Processing Systems and Micromechatronics for Information and Precision Equipment
  • San Francisco, California, USA, August 29–30, 2018
  • Conference Sponsors: Information Storage and Processing Systems Division
  • ISBN: 978-0-7918-5193-7
  • Copyright © 2018 by ASME

abstract

Coarse-grained models were developed to study the evaporation and transfer of the perfluoropolyether lubricant from the disk surface under laser heating. Both moving and stationary disks were simulated with a heat flux applied to a central region under a pad. A novel concept of a reconditioning region was proposed to convert the periodic boundary conditions to more realistic conditions with the fresh material fed at the inlet. The results indicate significant influence of the disk velocity, heat flux and gap distance on the evaporation and transfer of the lubricant. With increasing heat flux, more lubricant molecules tend to reach the slider surface.

Copyright © 2018 by ASME

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