A Model for Magnetic Tape/Guide Friction Reduction by Laser Surface Texturing

Raeymaekers, Bart; Etsion, I.; Talke, Frank E.

doi:10.1007/s11249-007-9242-9

Cited by 33 publications

(23 citation statements)

References 21 publications

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“…The preferred and most efficient way to optimize surface texturing is by parametric analysis in a theoretical model. This was done in several models for bearings [18,29], various seals [8,11,13,23,24,31], piston rings [14,26] and magnetic recording tapes [32] to obtain maximum load capacity, minimum friction, maximum film stiffness and minimum leakage. Many experimental studies attempting optimization by trial and error approach can also be found in the literature (see Ref.…”

Section: Optimizationmentioning

confidence: 99%

Modeling of surface texturing in hydrodynamic lubrication

Etsion

2013

Friction

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180

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Section: Optimizationmentioning

confidence: 99%

Modeling of surface texturing in hydrodynamic lubrication

Etsion

2013

Friction

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180

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“…As the clearance h 0 decreases from 0.28 to 0:028 lm, 0:0028 lm, or 0, the pressure rise over the converging region of the dimple and the pressure drop over the diverging region become intense, and the pressure rise becomes greater than the pressure drop. In previous theoretical studies [9,10], the generation of high average gas pressure has been explained as resulting from this asymmetric pressure distribution over the dimple region in the case of gas lubrication using surface texturing as well as in the case of liquid lubrication.…”

Section: Mechanism Of High Gas Pressure Generationmentioning

confidence: 99%

“…They investigated the optimal conditions to improve sealing performance by changing the values of parameters, e.g., seal clearance, dimple area density, and dimple aspect ratio. Other parametric analyses have been conduced to investigate optimal conditions of gas lubrication with surface texturing [9,10]. However, a clear understanding of the mechanism that induces high gas pressure over a textured surface would help us to design the optimal configuration of the surface texture without trial and error.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Levitation of a Slider with a Micro/Nanoscale Surface Structure on a Rotating Disk

et al. 2014

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It has been previously reported that the friction between a partially polished diamond-coated surface and a metal surface was drastically reduced to zero in the atmosphere as relative speed was increased (Nakamori et al. in Diam Relat Mater 14:2122-2126, 2005. On the other hand, it has also been reported that laser-textured surfaces have good tribological performance in the case of gas lubrication (Kligerman and Etsion in Tribol Trans 44: [472][473][474][475][476][477][478] 2001). The surfaces in the aforementioned two cases have a micro/nanoscale structure. It is expected that both surfaces are levitated by a high-pressure gas film between sliding surfaces by the same mechanism. In the present work, the mechanism of high gas pressure generation is clarified by the performance of numerical simulations and by theoretical analysis. The following two features of pressure distributions on textured surfaces were found to induce high gas pressure. First, gas pressure increases in the direction of the counter surface's motion over the dimple region. Second, the pressure distribution over the flat region is convex upward, and hence, the high pressure obtained at the outlet of the dimple is maintained for a long distance in the flat region. The causes of such pressure distributions are herein explained analytically. The governing factor of pressure distributions and the optimal dimple location in the period of the repeated surface pattern are also discussed. Furthermore, the knowledge obtained here is utilized to design the surface structure to obtain high gas pressure.

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“…4b-d. Talke and colleagues [29,30] studied the phenomenon of reducing the friction coefficient between the magnetic tape surface and the guide interface by laser surface texturing (LST) and put a mathematical model that predicts the optimum dimensions for these induced microdimples on the surface that gives the lowest friction coefficient. Current results showed that the existence of such lubricant aggregates or micro-dimples, with some specific geometry and distribution intensity, on the magnetic tape surface resulted in reducing the friction coefficient the same way if they were existed on the guide interface via LST.…”

Section: Surface Topography and Optical Imaging Of The Representativementioning

confidence: 99%

“…These micro-dimples act as micro-hydrodynamic bearings, thereby creating a local pressure increase between the sliding surfaces [29,30]. This in turn increases the load carrying capacity for such bearings and reduces the friction coefficient for a constant load.…”

Section: Microtribological Behavior and The Micro-dimples Modelmentioning

confidence: 99%