2013 Fiscal Year Final Research Report
The lift generating mechanism of a diamond film and control by fine surface structure.
| Project/Area Number |
23656113
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Tohoku University |
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Principal Investigator |
MIKI Hiroyuki 東北大学, 国際高等研究教育機構, 准教授 (80325943)
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| Co-Investigator(Renkei-kenkyūsha) |
YONEMURA Shigeru 東北大学, 流体科学研究所, 准教授 (00282004)
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| Project Period (FY) |
2011 – 2012
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| Keywords | トライボロジー / 表面テクスチャ / ダイヤモンド / 潤滑状態遷移 |
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| Research Abstract |
This research evaluated quantitatively the relationship of friction reduction conditions and surface fine shape by the flat part of the polishing diamond film surface, and mixture of fine asperity about the phenomenon which shows the outstanding sliding characteristic. I verified in detail about the boundary domain of the stable state of contact and surfacing, and, specifically, the poly-crystal diamond film which gave moderate polishing showed clearly that super-low friction dry is shown. As a result, it was shown that the polishing diamond film as a sliding component produces the stable contact change state in all the domains of high-speed sliding of a fluid lubrication domain from low-speed sliding of mixture method lubrication. Furthermore, I was able to tackle modeling of the phenomenon and was able to show clearly that fluid lubrication changes are induced by the ratio of a flat part and an unpolished part.
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