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A study about formation mechanism of tribofilm inducing super lubricity phenomenon

Research Project

Project/Area Number 19K14879
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18040:Machine elements and tribology-related
Research InstitutionTokyo Metropolitan Industrial Technology Research Institute

Principal Investigator

Tokuta Yuuki  地方独立行政法人東京都立産業技術研究センター, 開発本部マテリアル応用技術部プロセス技術グループ, 主任研究員 (30633515)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsトライボロジー / コーティング / DLC膜 / 摩擦触媒 / 超低摩擦化現象 / 省エネルギー / 触媒作用 / オイルレス技術 / 超低摩擦 / 触媒反応
Outline of Research at the Start

先行研究において,エタノール雰囲気中で非晶質炭素膜と二酸化ジルコニウムを摩擦すると,摩擦係数が0.001以下を示す「超低摩擦現象」が報告されている.この現象は,ZrO2の触媒作用により摩擦面に形成された,摩擦反応膜の効果と推察されている.本研究では,炭素の同位体によるラベリング法を用いて,「トライボフィルムの形成メカニズム」,「トライボフィルムの正体」,「低摩擦化のメカニズム」を解明する.

Outline of Final Research Achievements

In this study, we investigated about formation mechanism of tribofilm which induces super lubricity phenomenon in the case of sliding between DLC films and ZrO2 in vaporized ethanol environment. Several research, such as mass spectroscopy on tribofilm formed via friction in vaporized 13C-ethanol environment and Raman spectroscopy on tribofilm which was formed via friction test using various material coupling (Alloys and ceramics other than DLC) in vaporized ethanol environment were performed. From these experimental results, we confirmed that catalytic reaction of ZrO2 (such as dehydration and dehydrogenation) contributed to form the amorphous tribofilm which induce super-lubricity. It is considered that ethanol in friction environment changed to ethylene via dehydration of ZrO2, and ethylene changed to polyethlene via dehydrogenation and polymerization. In last process, we thought that amorphous tribofilm which induces super lubricity was formed via unclarified reaction.

Academic Significance and Societal Importance of the Research Achievements

当該技術は、エタノール蒸気を添加した雰囲気中で非晶質カーボン膜(DLC膜)とジルコニア(ZrO2)を摩擦することで著しい低摩擦化が生じる技術である。すなわち、自動車摺動部品をはじめとした摩擦材料に適用することで、燃費の向上などの省エネルギー化が可能となる。このことから、サステナブル社会の構築の一助となる研究であると考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] 摩擦力測定精度向上のための慣性質量の影響検討2020

    • Author(s)
      中島昌一、齋藤庸賀、徳田祐樹
    • Journal Title

      潤滑経済

      Volume: 6 Pages: 44-47

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] The investigation about formation mechanism of tribofilm induces super-lubricity of DLC films sliding against ZrO2 in on mechanism of tribofilm induces super-lubricity of DLC films sliding against ZrO2 in vaporized ethanol environment2021

    • Author(s)
      Yuuki Tokuta, Yasuyoshi Saito, Shoichi Nakashima, Masahiro Kawaguchi
    • Organizer
      Malaysian International Tribology Conference 2020ne
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The investigation about formation mechanism of tribofilm induces super-lubricity of DLC films sliding against ZrO2 in vaporized ethanol environment2021

    • Author(s)
      Yuuki Tokuta, Yasuyoshi Saito, Shoichi Nakashima, Masahiro Kawaguchi
    • Organizer
      Malaysian International Tribology Conference 2020ne
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] エタノール雰囲気中での超低摩擦化現象における摩擦材料の影響2020

    • Author(s)
      齋藤庸賀、徳田祐樹、中島昌一、川口雅弘
    • Organizer
      トライボロジー会議 2020 秋 別府
    • Related Report
      2020 Research-status Report
  • [Presentation] DLC膜の基礎および低摩擦化手法に関する研究事例2020

    • Author(s)
      徳田祐樹
    • Organizer
      日本表面真空学会 2021年2月例会(第306回)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] The investigation about formation mechanism of tribofilm induces super-lubricity of DLC films sliding against ZrO2 in vaporized ethanol environment2020

    • Author(s)
      Yuuki Tokuta, Yasuyoshi Saito, Shoichi Nakashima, Masahiro Kawaguchi
    • Organizer
      Malaysian International Tribology Conference 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structure analysis of tribofilm generating Friction Fade-Out of DLC films using isotopes of carbon2019

    • Author(s)
      Yuuki Tokuta, Hideaki Tokai, Masataka Nosaka, Takahashi Kato Masahiro Kawaguchi
    • Organizer
      European Conference on Tribology 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 炭素同位体を用いたDLC膜の摩擦フェイドアウトを発現するトライボフィルムの構造分析2019

    • Author(s)
      徳田 祐樹,東海 英顯,野坂 正隆,加藤 孝久,川口 雅弘
    • Organizer
      トライボロジー会議2019春
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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