Investigation of Lubricant Transfer and Lubricant Fragmentation in a Hard Disk Drive

Seo, Young Woo; Rosenkranz, Andreas; Talke, Frank E.

doi:10.1007/s11249-017-0970-1

Cited by 1 publication

(2 citation statements)

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“…It is also evident that the helium has a significant effect on the pressure distribution if the slider flies very close to the disk. According to the study of Seo et al [8], the pressure difference greatly affects lubricant transfer.…”

Section: Pressure Distributionmentioning

confidence: 99%

“…The study of Tani et al [7] charged the slider with a negative voltage to prevent lubricant transfer, because the lubricant was negatively charged by the airflow. Furthermore, Seo et al [8] studied four types of lubricants to determine the effects of temperature, pressure, and velocity on lubricant fragmentation, respectively, and found that a local pressure change plays the most important role in lubricant fragmentation. A numerical model was developed by Mendez and Bogy [9] to simulate lubricant de-wetting on the slider surface by consideration of a disjoining pressure, and this model makes it easy to predict the distribution of the lubricant on the slider surface.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of lubricant transfer and distribution at head/disk interface in air-helium gas mixtures

et al. 2018

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Lubricant transfer and distribution at the head/disk interface in air-helium gas mixtures is investigated using a developed model that combines an air-bearing model with a molecular dynamics model. The pressure distribution is calculated by the air-bearing model at the head/disk interface with respect to the helium content and the pressure obtained is then input to the molecular dynamics model to understand the lubricant transfer mechanism. Finally, the effects of pressure at the boundary condition and disk velocity on lubricant transfer are discussed in relation to the helium fraction within the air-helium gas mixtures. Results show there is a decrease in the pressure difference with an increase in the helium percentage, which leads to a decrease in the volume of the lubricant transferred. The results also suggest that the lubricant is not easily to transfer in gas mixtures with a high percentage of helium, even when both higher disk velocities and pressure boundary conditions are applied.

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Section: Pressure Distributionmentioning

confidence: 99%