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Theoretical Study on Touchdown Vibration of Subnanometer Flying Head Slider and Molecularly Thin Liquid Film Lubrication

Research Project

Project/Area Number 16K06039
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Design engineering/Machine functional elements/Tribology
Research InstitutionTokyo Institute of Technology

Principal Investigator

Ono Kyosuke  東京工業大学, 工学院, 名誉教授 (40152524)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsヘッド・ディスクインタフェース / 表面力 / 分子間力 / ヘッドタッチダウン / 分離圧式 / 希薄液膜拡散方程式 / 弾性メニスカス接触理論 / 高粘度境界潤滑方程式 / ヘッドタッチダウン特性 / 高粘度境界層流体潤滑方程式 / ナノトライボロジー / 表面分子間力理論 / ヘッドスライダの接触振動 / submonolayer拡散理論 / 接触記録条件 / 拡散係数 / 表面力関連振動 / 希薄液膜流動 / コンタクトメカニクス / 表面・界面科学 / 境界潤滑 / ナノマイクロトライボロジー / 気液境界潤滑
Outline of Final Research Achievements

By measuring the surface textures of magnetic disk and considering the vdW force of Diamond-like-carbon layer, bonded and mobile lubericant layers, and asperity meniscus force, I established a theory of surface force between head and disk surface. Then, by using this surface force, I analyzed microwaviness (MW)-excited vibration of the head slider during touchdown and found that the experimental complex touchdown behaviors are caused by the MW-excited vibration in relation to the static instability of surface force. Next I derived the strict disjoining pressure equation by integrating molecular forces based on Rennard-Jones potential. Then by using the strict disjoining pressure, I newly derived rigorous diffusion equation for sub-monolayer and multi-layer liquid films. The validity of sub-monolayer diffusion equation was confirmed by experimental data. Moreover, as an extension of this thery, I developed a new Reynolds equation used for high viscosity boundary layer lubrication.

Academic Significance and Societal Importance of the Research Achievements

磁気ディスク装置の浮上ヘッド・ディスク間すきまは分子間引力が支配する1 nm以下になっており,分子間力を考慮した解析理論が必要である.本研究により,近接・接触二面間の表面力を定量的に評価できる統計的な力学理論を確立すると共に,これによりヘッドスライダの近接・接触時の動的現象を始めて理論的に明らかにした.また従来経験的に用いられてきた液膜と固体面との引力式やこれに基づく液膜の拡散現象に関する厳密理論を確立し,分子間力に起因する現象を連続体力学で効率よく評価できることを始めて明らかにした.さらに従来から実験的に評価されてきた添加剤による境界潤滑機構を理論的に評価できる潤滑方程式を開発した.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (29 results)

All 2019 2018 2017 2016

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 3 results,  Acknowledgement Compliant: 3 results) Presentation (17 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results) Book (2 results)

  • [Journal Article] Rigorous derivation of diffusion equation for submonolayer lubricant film2018

    • Author(s)
      小野京右
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 84 Issue: 864 Pages: 18-00200-18-00200

    • DOI

      10.1299/transjsme.18-00200

    • NAID

      130007439209

    • ISSN
      2187-9761
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 2.Disjoining Pressure Derived from the Lennard-Jones Potential, Diffusion Equation, and Diffusion Coefficient for Submonolayer Liquid Film2018

    • Author(s)
      Kyosuke Ono
    • Journal Title

      Surface

      Volume: 1 Issue: 1 Pages: 122-137

    • DOI

      10.3390/surfaces1010010

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 3.Numerical Analysis of Surface Force of Diamond-Like Carbon Surface Coated with Monolayer Lubricant Film2018

    • Author(s)
      Kyosuke Ono
    • Journal Title

      Tribology Online

      Volume: 13 Pages: 301-310

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical Analysis of Microwaviness-Excited Vibrations of a Flying Head Slider at Touchdown2018

    • Author(s)
      Kyosuke Ono
    • Journal Title

      Microsystem Technologies

      Volume: 24 Issue: 11 Pages: 4689-4702

    • DOI

      10.1007/s00542-018-3756-y

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] 単分子潤滑膜で被覆されたDiamond-Like-Carbon面の 表面力の理論的解明2018

    • Author(s)
      小野京右
    • Journal Title

      トライボロジスト

      Volume: 62 Pages: 784-799

    • NAID

      130006249170

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical analysis of microwaviness-excited vibrations of head slider at touchdown2017

    • Author(s)
      小野京右
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 83 Issue: 850 Pages: 17-00091-17-00091

    • DOI

      10.1299/transjsme.17-00091

    • NAID

      130006172074

    • ISSN
      2187-9761
    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Analysis of Microwaviness Excited Vibrations of a Flying Head Slider in Proximity and Asperity Contact Regimes2017

    • Author(s)
      Kyosuke Ono
    • Journal Title

      ASME Journal of Tribology

      Volume: 139 Issue: 6 Pages: 1-13

    • DOI

      10.1115/1.4036174

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Surface Texture Parameters of Perpendicular Magnetic Recording2017

    • Author(s)
      Kyosuke Ono
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 53 Pages: 1-6

    • DOI

      10.1109/tmag.2016.2626006

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Surface texture parameters of perpendicular recording magnetic disks2016

    • Author(s)
      小野 京右
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 82 Issue: 836 Pages: 15-00633-15-00633

    • DOI

      10.1299/transjsme.15-00633

    • NAID

      130005148175

    • ISSN
      2187-9761
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Numerical analysis of microwaviness-excited slider vibration in proximity and contact regimes2016

    • Author(s)
      小野 京右
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 82 Issue: 841 Pages: 16-00208-16-00208

    • DOI

      10.1299/transjsme.16-00208

    • NAID

      130005421080

    • ISSN
      2187-9761
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] TFC ヘッドスライダのタッチダウン現象のシミュレーション解析2019

    • Author(s)
      小野京右
    • Organizer
      IIP2018 情報・知能・精密機器部門講演会(日本機械学会)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 可変粘度境界層をもつ液膜の流体潤滑方程式の提案2019

    • Author(s)
      小野京右
    • Organizer
      トライボロジー会議2019春(東京)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高粘度境界層をもつ微小ステップテクスチャの流体潤滑特性の理論解析2019

    • Author(s)
      小野京右
    • Organizer
      トライボロジー会議2019春(東京)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Modified Reynolds Equations for High Viscosity Boundary Layer and Thin Film Lubrication Analysis of Taper/Taper-Flat Bearings as Models of Surface Texture2019

    • Author(s)
      Kyosuke Ono
    • Organizer
      ITC Sendai 2019 (日本トライボロジー学会)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] メニスカス弾性接触特性の高精度解析法2018

    • Author(s)
      小野京右
    • Organizer
      トライボロジー会議2018春(東京)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Understanding instabilities of TFC femto-slider aand pico-slider2018

    • Author(s)
      Kyosuke Ono
    • Organizer
      ISPS 2018 (米国機械学会ISPS部門講演会), USA
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Disjoining Pressure and Diffusion Equation for Submonolayer Liquid Film2018

    • Author(s)
      Kyosuke Ono
    • Organizer
      16th International Conference on Surface Forces (Russia)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ヘッドスライダの近接・接触時におけるディスク微小うねり励起振動の解析2017

    • Author(s)
      小野 京右
    • Organizer
      日本機械学会 IIP2017 情報・知能・精密機器部門講演会
    • Place of Presentation
      東洋大学(東京都文京区)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Research-status Report
  • [Presentation] ヘッドスライダの近接・接触時におけるディスク微小うねり励起振動の解析2017

    • Author(s)
      小野京右
    • Organizer
      日本機械学会 2018情報・知能・精密機器部門講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 単分子潤滑膜で被覆された 単分子潤滑膜で被覆された Diamond Diamond -Like -Carbon 面の表面力の理論的解明2017

    • Author(s)
      小野京右
    • Organizer
      トライボロジー会議2017春東京
    • Related Report
      2017 Research-status Report
  • [Presentation] Numerical Analysis of Microwaviness-Excited Vibrations of a Flying Head Slider at Touchdown2017

    • Author(s)
      Kyosuke Ono
    • Organizer
      ASME/ISPS2017 Conference, San Francisco, USA
    • Related Report
      2017 Research-status Report
  • [Presentation] Numerical Analysis of Surface Force of Diamond-Like-Carbon Surface Covered with Monolayer Lubricant Film2017

    • Author(s)
      Kyosuke Ono
    • Organizer
      World Tribology Conference 2017 Beijing
    • Related Report
      2017 Research-status Report
  • [Presentation] ヘッド・ディスクインタフェースにおける表面力研究の展開2017

    • Author(s)
      小野京右
    • Organizer
      トライボロジー会議2017秋 高松
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Disjoining Pressure and Diffusion Equation for Submonolayer Liquid Film2016

    • Author(s)
      Kyosuke Ono
    • Organizer
      2016 STLE Tribology Frontier Conference
    • Place of Presentation
      Drake Hotel, Chicago, USA
    • Year and Date
      2016-11-13
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 単分子以下の希薄液膜における拡散流動方程式2016

    • Author(s)
      小野 京右
    • Organizer
      2016トライボロジー会議秋
    • Place of Presentation
      新潟,朱鷺メッセ新潟コンベンションセンター(新潟市中央区)
    • Year and Date
      2016-10-12
    • Related Report
      2016 Research-status Report
  • [Presentation] Surface Texture Parameters of Perpendicular Recording Magnetic Disks2016

    • Author(s)
      Kyosuke Ono
    • Organizer
      The Asia-Pacific Magnetic Recording Conference
    • Place of Presentation
      Yonsei University, Seoul, Korea
    • Year and Date
      2016-07-13
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 垂直記録磁気ディスクの表面形状の測定・分析結果2016

    • Author(s)
      小野 京右
    • Organizer
      2016トライボロジー会議春
    • Place of Presentation
      国立オリンピック記念青少年総合センター(東京都渋谷区)
    • Year and Date
      2016-05-23
    • Related Report
      2016 Research-status Report
  • [Book] 数値解析と表面分析によるトライボロジーの解析と制御2018

    • Author(s)
      佐々木信也監修 小野京右 他
    • Total Pages
      1158
    • Publisher
      テクノシステム
    • Related Report
      2018 Annual Research Report
  • [Book] 数値解析と表面分析によるトライボロジーの解明と制御 第8章,第3節,第1項 磁気ディスク装置のヘッド・ディスクインタフェース現象に対する数値解析2018

    • Author(s)
      小野京右(分担)
    • Total Pages
      1158
    • Publisher
      株式会社 テクノシステム
    • Related Report
      2017 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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