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Development of design proposal for ultla low friction by controlling of permittivity of nano transformed layer and adsorbed lubricants on carbonaceous hard coating

Research Project

Project/Area Number 18H03751
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
Research InstitutionNagoya University

Principal Investigator

Umehara Noritsugu  名古屋大学, 工学研究科, 教授 (70203586)

Co-Investigator(Kenkyū-buntansha) 野老山 貴行  名古屋大学, 工学研究科, 准教授 (20432247)
徳田 祐樹  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)
川口 雅弘  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, 上席研究員 (40463054)
村島 基之  名古屋大学, 工学研究科, 助教 (70779389)
久保 百司  東北大学, 金属材料研究所, 教授 (90241538)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥43,550,000 (Direct Cost: ¥33,500,000、Indirect Cost: ¥10,050,000)
Fiscal Year 2021: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2020: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2019: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2018: ¥21,190,000 (Direct Cost: ¥16,300,000、Indirect Cost: ¥4,890,000)
Keywordsカーボン系硬質膜 / 摩擦面その場評価 / 誘電率 / ナノ構造層 / 潤滑油 / 摩擦面その場観察
Outline of Final Research Achievements

Carbonaceous hard coatings as DLC and CNx are attracted keen attention to show not only high wear resistance but also ultra low friction. However oil lubrication does not provide ultra low friction for DLC. In order to overcome this issue, we measured reflectance spectrum at friction area of CNx in-situ in PAO oil. After the estimation of polarizability of PAO oil and transformed layer, we found that the friction coefficient has strong relationship to the polarizability of PAO oil and transformed layer, that leads to the increasing of van der Waals force between transformed layer and PAO oil. The1.4 times of increasing of product of both polarizabilities provided 20 % reduction of friction coefficient. Also XPS analysis of transformed layer of CNx confirmed the change of bonding status. And then MD simulation showed the possibility of the change of density and bonding structure of Carbonaceous hard coating during friction.

Academic Significance and Societal Importance of the Research Achievements

耐摩耗・超低摩擦の摺道材としてカーボン系硬質膜の応用が進められている.高面圧での境界潤滑下での摩擦では、境界潤滑膜の強固な吸着が求められ、予備実験から摩擦面のナノ構造変化層と吸着潤滑油層の誘電率が重要と考えられる。そこで、本研究では、カーボン系硬質膜の構造変化層と吸着膜の誘電率に注目し、屈折率と消衰係数の光学特性から誘電率を推定し、摩擦係数との関係を明らかにした。その結果、これらの誘電率の増加と摩擦係数の減少において強い相関性があることが明らかとなり、誘電率が今後の油中超低摩擦面開発のための良い設計指針となる事を明らかにした。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] Korian Institure for Material Science(韓国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Realization of near-less friction of ta-CNx coating under R32 refrigerant environment2022

    • Author(s)
      Wooyoung Lee, Motoyuki Murashima, Noritsugu Umehara, Takayuki Tokoroyama, Norihisa Horaguchi, Takao Ishimoto
    • Journal Title

      Tribology International

      Volume: 168 Pages: 107450-107450

    • DOI

      10.1016/j.triboint.2022.107450

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In situ observation of the formation of MoDTC-derived tribofilm on a ta-C coating using reflectance spectroscopy and its effects on friction2021

    • Author(s)
      N. Hashizume, M. Murashima, N. Umehara, T. Tokoroyama and W-Y. Lee
    • Journal Title

      Tribology International

      Volume: 162 Pages: 107128-107128

    • DOI

      10.1016/j.triboint.2021.107128

    • NAID

      120007192019

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Triboemission of hydrocarbon molecules from diamond-like carbon friction interface induces atomic-scale wear2019

    • Author(s)
      Y. Wang, N. Yamada, J. Xu, J. Zhang, Q. Chen, Y. Ootani, Yuji Higuchi1, Nobuki Ozawa, M.-I. De B. Bouchet, J. M. Martin, S. Mori, K. Adachi, M. Kubo
    • Journal Title

      Science Advances

      Volume: 5 Issue: 11 Pages: 1-9

    • DOI

      10.1126/sciadv.aax9301

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ベース油中CNxの摩擦界面その場反射分光分析による 摩擦メカニズムの解明2019

    • Author(s)
      岡本竜也,梅原徳次,村島基之,斉藤浩二,眞鍋 和幹,林圭二
    • Journal Title

      トライボロジスト

      Volume: 63 Pages: 755-767

    • NAID

      130007511397

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] その場摩擦界面反射分光分析による潤滑下カーボン系硬質膜の摩擦メカニズムの検討2021

    • Author(s)
      梅原徳次
    • Organizer
      表面技術協会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] EFFECT OF HARD CABONACEOUS COATINGS ON FRICTION AND WEAR PROPERTIES FOR ALUMINIUM ALLOY SLIDE BEARINGS2021

    • Author(s)
      Noritsugu Umehara
    • Organizer
      MITC2020
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ta-CNx膜のベース油中摩擦における潤滑油温度の摩擦係数, 油膜厚さ及び構造変化層の分極率に及ぼす影響2020

    • Author(s)
      村瀬 良 , 梅原徳次, 野老山貴行, 村島基之, Lee Wooyoung
    • Organizer
      日本機械学会年次大会
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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