MoS_2ショット処理を施した小型機器用すべり軸受の性能評価 : 第1報,表面性状とストライベック曲線による検討(機械要素,潤滑,工作,生産管理など)

概要

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MoS_2-shot coating technology is recently focused as one of potential methods of surface modification to realize a low friction state. In this paper, performances of a small-sized journal bearing with MoS_2-shot coating, which is aimed to be applied to a spindle of precision equipment such as magnetic recording storage system, are experimentally investigated through the observation of surface property and Stribeck diagram. Scanning electron microscope (SEM) images and reflection electron microscope (REM) images of SUS surface with MoS_2-shot coating show that original MoS_2 particles are broken into smaller pieces at bumping against SUS surface by jet flows of highly pressurized air, and are forcibly embedded into the surface with forming micro-dimples. Results of coefficient-of-friction characteristics of shaft-sleeve interface of the journal bearing, i.e., Stribeck diagram, show MoS_2-shot bearing can realize a low friction performance at a low rotational speed and reduce the magnitude of stick-slip much compared with the case of no-coating bearing.
社団法人日本機械学会の論文
2004-03-25