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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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. |
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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 |
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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. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Li, Bei Wong, Chee How |
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Article |
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Li, Bei Wong, Chee How |
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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 |
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Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness |
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Molecular dynamics studies of lubricant depletion under moving laser heating: Effects of laser power and film thickness |
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molecular dynamics studies of lubricant depletion under moving laser heating: effects of laser power and film thickness |
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2018 |
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https://hdl.handle.net/10356/88197 http://hdl.handle.net/10220/44571 |
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