Super low friction of the diamond film by the high-speed microvibration

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630032
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Tohoku University
• Principal Investigator: MIKI Hiroyuki 東北大学, 学際科学フロンティア研究所, 准教授 (80325943)
• Co-Investigator(Renkei-kenkyūsha): YONEMURA Shigeru 東北大学, 流体科学研究所, 准教授 (00282004)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 超低摩擦遷移 / 研磨ダイヤモンド / 流体潤滑 / 希薄気体潤滑モデル / テクスチャ

Outline of Final Research Achievements

The smooth diamond film which has minute structure on the surface is obtained by polishing the surface of the polycrystalline diamond film moderately. As for this film, lubrication state changes depending on sliding speed continually and has the characteristic that zero friction occurs in the high speed sliding region. The friction reduction effect by high speed sliding between the metal and the polished diamond film is reported in the previous study. We studied the possibility of the local friction reduction effect by the combination of the film and micro-vibration in this study. In particular, we experimentally evaluated about the friction reduction effect between a diamond film and the metal plate by ball on disk testing equipment and friction testing equipment given micro-vibration. As a result, we clarified dominant factor and control feature of the friction reduction effect by support of the computer simulation.

Free Research Field

機能性材料学