紫外線照射処理および熱処理した磁気ディスク潤滑膜の機械特性の評価

概要

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Using atomic force microscopy (AFM), nanoindentation, nanowear, and viscoelastic testing were performed to elucidate nanomechanical properties of lubricant-coated magnetic disks. The surface deformation resistance of an ultraviolet (UV)-irradiated disk is superior to those of heat-treated or untreated disks. Evaluation of viscoelastic change using nanowear tests revealed that, for the UV-irradiated and untreated magnetic disks, tanδ does not decrease with friction. However, for the heat-treated disk, tanδ decreases with sliding. This result demonstrates the resupply capability of the UV-irradiated and untreated lubricant-coated disks during sliding. The lubricant-coated magnetic disks’ friction properties are evaluated using the ball-on disk friction test. The UV-irradiated magnetic disk exhibits stable friction coefficients, and less friction damage than the other. These superior properties of the UV-irradiated magnetic disk can be understood in terms of nanomechanical properties evaluated using AFM. The UV-irradiated disk has suitable bonding strength between the lubricant and DLC, in addition to the resupply capability of the free lubricant.
社団法人表面技術協会の論文
2009-04-01