2311 磁気ディスク表面における潤滑剤分子の配列構造の形成に伴う摩擦特性の変化(要旨講演,情報機器コンピュータメカニクス)

概要

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To ensure the reliability and durability of hard disk drives, molecularly thin polymeric liquid films of perfluoropolyether (PFPE) coated on the disk surfaces possess a mixed structure consisting of molecules bonded to the disk surfaces and non-bonded mobile molecules. Aiming to clarify the influence of film composition (mobile/bonded) on tribological performance, we measured friction properties of two types of 2-nm-thick PFPE films (polar Zdo12000 and nonpolar Z03) under lightly loaded (loading force: 0-1mN) and quasi-static (rotational speed: 2.1mm/s) conditions as a function of elapsed time. The friction force of Z03 remained unchanged with time and it increased linearly with loading force. In contrast, accompanying with the development of bonded molecules over time, the fiction force of Zdo12000 increased with time and transited to a nonlinear increase with loading force as the time proceeded.
社団法人日本機械学会の論文
2007-03-19