| Project/Area Number |
20360337
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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 |
Material processing/treatments
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| Research Institution | Fukui National College of Technology |
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Principal Investigator |
YASUMARU Naoki Fukui National College of Technology, 機械工学科, 教授 (90158006)
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| Co-Investigator(Renkei-kenkyūsha) |
MIYAZAKI Kenzo 京都大学, エネルギー理工学研究所, 教授 (50293957)
KATO Hirotaka 福井工業高等専門学校, 機械工学科, 教授 (30311020)
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| Research Collaborator |
KIUCHI JUNSUKE 福井工業高等専門学校
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2008: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
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| Keywords | フェムト秒レーザー / アブレーション / 硬質薄膜 / ダイヤモンド状炭素 / ガラス状炭素 / ナノ構造 / トライボロジー / DLC / GC |
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| Research Abstract |
This paper reports macro and micro frictional properties of DLC, TiN, CrN films and GC substrate of which surfaces are nanostructured with femtosecond (fs) laser pulses. As for the macro frictional properties, the friction coefficients of carbon materials of DLC and GC exhibited fairly lower values compared with those of TiN and CrN. The friction coefficient μ of DLC obtained for a hardened steel ball decreased with an increase of the laser power and approached to μ of GC because of the modification from DLC to GC. The friction coefficient μ of the nanostructured surface was measured with a micro-scratch test at an ultralight load of 1.5mN. For this condition, μ of the nano -structured surface of DLC, TiN, and CrN increased, compared with those of the non-irradiated surface. On the other hand, μ of GC irradiated at a low laser energy has shown a minimum value of 0.05 and then increases with an increase of the laser power.
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