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Research Article | Open Access

Investigation of electrostatically tunable adhesion and instability of flying head slider

Fan ZHANG1, Yu WANG1( ), Yueqiang HU2, Mingquan ZHANG1, Baotong LI1
School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
National Engineering Research Center for High Efficiency Grinding, College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
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Abstract

The interfacial adhesion between microstructures is inevitable in a micro-electro-mechanical system (e.g., hard disk drive (HDD)), which may lead to complicated microtribodynamics problems. This research has investigated the effect of surface potential on the interfacial adhesion and microtribodynamics of the head–disk interface (HDI) in an HDD. A dynamic continuum surface force model, where the electrowetting is considered, is proposed to evaluate the interfacial interaction, and then employed into a two-degree-of-freedom (2DOF) model to theoretically analyze the potential influence mechanism on the microtribodynamics. The results confirm that the elimination of potential can effectively repress the adhesion retention, which is further proved by the measured slider response with a laser Doppler vibrometer (LDV). Moreover, the effect of the potential on the adhesion-induced instability is also analyzed through the phase portrait. It tells that the critical stable flying height can be lowered with the elimination of potential.

Keywords

adhesioninstabilityretentionelectric field (EF)

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Friction
Volume 12 Issue 3,
March 2024
Pages 462-473
DOI: 10.1007/s40544-023-0773-3
Cite this article:
ZHANG F, WANG Y, HU Y, et al. Investigation of electrostatically tunable adhesion and instability of flying head slider. Friction, 2024, 12(3): 462-473. https://doi.org/10.1007/s40544-023-0773-3

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Received: 22 April 2022
Revised: 01 October 2022
Accepted: 30 April 2023
Published: 24 August 2023
© The author(s) 2023.

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