2015 Fiscal Year Final Research Report
The design of high wear proof and low friction DLC coating for cyclic impact under boundary lubrication
| Project/Area Number |
25420087
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Akita University (2014-2015)
Nagoya University (2013) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 繰り返し衝突 / ダイヤモンドライクカーボン / 貧潤滑 / 結晶構造 / ラマン分光分析 / XPS分析 |
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| Outline of Final Research Achievements |
The impact wear resistance is demanded in several car parts. One of the potential candidate to prevent this impact wear is assumed DLC. In this study, we conducted impact wear tests with SCM420 pin and DLC coating under lubricated condition. We conducted to distinguish impact wear of DLC from the plastic deformation of substrate by observation of cross-sectional images of DLC which was prepared by FIB equipment. The impact wear crater was also observed by atomic force microscope (AFM) to measure the arc length of the bottom of the crater, then elongation of the DLC surface was factor in strain of the crater diameter and the arc length. The SEM and AFM observation, and impact wear depth were summarized in impact wear map. Wear map indicated that the critical impact cycles of DLC films from mild to severe impact wear was existed. The severe wear took place when the strain excessed 0.000058 regardless of DLC coating thickness, and peeling off took place when it excessed 0.00007.
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| Free Research Field |
トライボロジー
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