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Duplex reactive fluorocarbon films with spin-off resistant characteristics

Barlow, M; Braitber, M; Davis, L; Dunn, V; Frew, D; (1987) Duplex reactive fluorocarbon films with spin-off resistant characteristics. IEEE Transactions on Magnetics , 23 (1) pp. 33-35. 10.1109/TMAG.1987.1064802.

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Abstract

As a group, fluorocarbons are by far the most common disc lubricants used in rotating storage memories. They possess excellent properties including chemical inertness, low surface tension, low volativity and moisture repellancy. They have, however, one serious limitation: the continual loss of lubricant from the rotating disc surface due to centrifugal migration. This leads to increased head to disc interference and may eventually cause complete failure of the head-disc assembly (HDA) unit. A unique solution to this problem is described in this paper. It was arrived at by combining two fluorocarbon films, one chemically and permanently bonded to the media surface, the other a normally applied lubricant which is overcoated onto the primed disc surface. These duplex films retain the excellent lubricant properties of the single film but dramatically reduce the lubricant loss by spin-off. Experimental data for duplex and single lubricant systems are presented including spin-off curves, stiction and friction measurements and start-stop wear testing. Finally, a mechanism based upon polymer chain entanglement is proposed to explain the retention of lubricant in this newly discovered system. © 1987 IEEE

Type: Article
Title: Duplex reactive fluorocarbon films with spin-off resistant characteristics
DOI: 10.1109/TMAG.1987.1064802
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/1569982
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