2018 Fiscal Year Final Research Report
The effect of oil aditives on the wear of DLC and its in-situ obserbation by fluorescent light emission method
| Project/Area Number |
16H04252
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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 |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Nagoya University (2017-2018)
Akita University (2016) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
月山 陽介 新潟大学, 自然科学系, 助教 (00533639)
山口 誠 秋田大学, 理工学研究科, 准教授 (90329863)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | DLC / 摩擦 / 摩耗 / エンジン / 蛍光染色 / その場観察 / ラマン分光分析 / 境界潤滑 |
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| Outline of Final Research Achievements |
To clarify an effect of oil additives on wear of Diamond-Like Carbon under lubrication, a friction test with in-situ observation to the contact point by using fluorescent stain method for imitation wear powders such as MoDTC, and measurement of DLC wear amount was conducted. As a result, imitation wear powders which diameter less than 1 um could enter into the contact point even if it was boundary lubrication condition, then those situation could enhance the wear of DLC. Especially, Mo2C had abrasive effect to enhance wear of DLC and also the MoDTC itself had wear acceleration effect. The mechanism of wear acceleration by MoDTC was assumed to be classified to chemical wear by Raman analysis.
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| Free Research Field |
トライボロジー
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| Academic Significance and Societal Importance of the Research Achievements |
内燃機関は今後50年間において全自動車の約70％以上を依然として占め，燃費向上は化石燃料の使用量減少のために不可欠である．ピストンリングとライナー部の摩耗にはエンジン油，燃料，燃焼による温度上昇，摩擦・気液混合など複雑な条件であるが，エンジン内での摩擦係数減少の達成により2％の燃費向上が見込まれている．特定の添加剤による摩耗増大機構の解明は，エンジンの長寿命化への設計指針を与えるため非常に重要である．
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