Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness

Molecular dynamics simulation is employed to study the depletion behaviors of perfluoro-lubricants under scanning laser heating for heat-assisted magnetic recording hard disk drives. A partial lubricant near the substrate is irradiated by the laser beam to mimic nano-scale heat transfer from disk to...

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Main Authors: Li, Bei, Wong, Chee How
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2018
Subjects:
Online Access:https://hdl.handle.net/10356/88197
http://hdl.handle.net/10220/44571
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-881972020-03-07T13:19:27Z Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness Li, Bei Wong, Chee How School of Mechanical and Aerospace Engineering Lubricant Depletion Molecular Dynamics Molecular dynamics simulation is employed to study the depletion behaviors of perfluoro-lubricants under scanning laser heating for heat-assisted magnetic recording hard disk drives. A partial lubricant near the substrate is irradiated by the laser beam to mimic nano-scale heat transfer from disk to lubricant. The lubricant surface morphology and thickness profiles are examined to reveal the dynamic depletion behaviors. The localized temperature evolution is also evaluated to illustrate the direction-dependent ridge formation around the depletion zone. In addition, the effects of laser power and film thickness on lubricant depletion are explored. Although evaporation is enhanced significantly at high laser powers or for lubricant with thickness around one monolayer, thermodiffusion is the primary mode of lubricant depletion under scanning laser heating. MOE (Min. of Education, S’pore) 2018-03-16T03:23:24Z 2019-12-06T16:58:09Z 2018-03-16T03:23:24Z 2019-12-06T16:58:09Z 2015 Journal Article Li, B., & Wong, C. (2015). Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness. Tribology International, 92, 38-46. 0301-679X https://hdl.handle.net/10356/88197 http://hdl.handle.net/10220/44571 10.1016/j.triboint.2015.05.015 en Tribology International © 2015 Elsevier Ltd.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Lubricant Depletion
Molecular Dynamics
spellingShingle Lubricant Depletion
Molecular Dynamics
Li, Bei
Wong, Chee How
Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
description Molecular dynamics simulation is employed to study the depletion behaviors of perfluoro-lubricants under scanning laser heating for heat-assisted magnetic recording hard disk drives. A partial lubricant near the substrate is irradiated by the laser beam to mimic nano-scale heat transfer from disk to lubricant. The lubricant surface morphology and thickness profiles are examined to reveal the dynamic depletion behaviors. The localized temperature evolution is also evaluated to illustrate the direction-dependent ridge formation around the depletion zone. In addition, the effects of laser power and film thickness on lubricant depletion are explored. Although evaporation is enhanced significantly at high laser powers or for lubricant with thickness around one monolayer, thermodiffusion is the primary mode of lubricant depletion under scanning laser heating.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Li, Bei
Wong, Chee How
format Article
author Li, Bei
Wong, Chee How
author_sort Li, Bei
title Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
title_short Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
title_full Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
title_fullStr Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
title_full_unstemmed Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness
title_sort molecular dynamics studies of lubricant depletion under moving laser heating: effects of laser power and film thickness
publishDate 2018
url https://hdl.handle.net/10356/88197
http://hdl.handle.net/10220/44571
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