| Project/Area Number |
12450064
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
設計工学・機械要素・トライボロジー
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| Research Institution | Utsunomiya University |
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Principal Investigator |
KAGAMI Jujiro Utsunomiya University, Faculty of Engineering, Professor, 工学部, 教授 (60005337)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGUCHI Takahisa Utsunomiya University, Faculty of Engineering, Research Associate, 工学部, 助手 (60234043)
HATAZAWA Tetsuzo Utsunomiya University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30114169)
FUJIMOTO Takashi Yuge National College of Maritime Technology, Department of Electronic-Mechanical Engineering, Associate Professor, 電子機械工学科, 助教授 (30332076)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥14,200,000 (Direct Cost: ¥14,200,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥12,600,000 (Direct Cost: ¥12,600,000)
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| Keywords | real contact area / solid surface / sputtered thin films / multi-scale / hertz contact / SPM / AFM |
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| Research Abstract |
It is difficult to detect the real contact area with lateral size of less than several μm by existing methods. In this study, a technique is proposed to realize the detection of the micro-contacts. The technique for detecting the contacts is based on the principle using transfers between sputtered thin films coated on both of contact surfaces. In the previous study, to realize the detection of the micro-contacts of less than 1μml in lateral size successfully, sputtered thin films of Au and Pt on a smooth surface are used. Using the procedures, not only the plastic but also elastic contacts may be expected to be seen at the range of several ten nm in lateral size.
In this study, in order to clear the contact behavior between the rough surface of steel ball and a smooth glass surfaces which have asperities including micro- and micro-micro-asperities, indentation experiments and the real contact area measurements are carried out. Furthermore, in order to clear the detecting accuracy of the method, the micro-contacts between both surfaces of a rough steel ball and a smooth glass flat were observed and measured, using several measurement modes of the SPM (Scanning probe microscope). It may be expected from the experimental result that this method is able to detect the real contact area by elastic or plastic contact with high accuracy.
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