High Shear Rate Rheology of Monolayer Liquid Film at Ultra Smooth Surfaces

• Project/Area Number: 22360072
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Saga University
• Principal Investigator: ZHANG Bo 佐賀大学, 大学院・工学系研究科, 教授 (60264678)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2010: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
• Keywords: マイクロ/ナノトライボロジー / 単分子膜 / レオロジー / ハードディスク / ナノトライボロジー / トライボロジー / PFPE / レオレジー / ハードデイスク

Research Abstract

The constant increasing in the recording density of the hard disk is alwaysassociated with the decreasing in the fly height of the magnetic head and it is necessary to reduce the fly height to 2-3 nm for 1Tb/in2. A monolayer PFPE liquid film is coated over the hard disk surface to prevent the contamination. In this study in-situ observation of air bearing surfaces by using a high speed microscope camera was conducted and the flow behavior of adsorbed film was clarified.

Research Products

• [Journal Article] The Effect of Humidity on Frictional Behavior of Slider Air Bearings in Both Air and Nitrogen Gas (2011)
  • Author(s): Bo Zhang, Toshifumi Mawatari, and Akira Nakajima
  • Journal Title: International Tribology Conference, Hiroshima 2011
  • Peer Reviewed
• [Journal Article] Slider air beading design in consideration of the Pumping effect (2011)
  • Author(s): Bo Zhang, Toshifumi Mawatari, and Akira Nakajima
  • Journal Title: Proceedings of the STLE/ASME 2011 International Joint Tribology Conference IJTC2011
  • Peer Reviewed
• [Journal Article] The Effect of Humidity on Frictional Behavior of Slider Air Bearings in Both Air and Nitrogen Gas (2011)
  • Author(s): Bo Zhang, Toshifumi Mawatari, Akira Nakajima
  • Journal Title: International Tribology Conference, Hiroshima 2011 Volume: ITC Hiroshima 2011
  • Peer Reviewed
• [Journal Article] Slider air beading design in consideration of the Pumping effect (2011)
  • Author(s): Bo Zhang, Toshifumi Mawatari, Akira Nakajima
  • Journal Title: Proceedings of the STLE/ASME 2011 International Joint Tribology Conference IJTC2011 Volume: IJTC2011 Pages: 1-3
  • Peer Reviewed
• [Journal Article] Rheology of Nano PFPE Liquid Film at Hard Disk Surfaces under Blow Off Flow (2010)
  • Author(s): Proceedings of the STLE/ASME 2011 International Joint Tribology Conference IJTC2011
  • Journal Title: International Tribology Congress -ASIATRIB 2010
  • Peer Reviewed
• [Journal Article] Pumping effect of slider air bearing surface for non-langmuir adsorption (2010)
  • Author(s): Bo Zhang, and Akira nakajima
  • Journal Title: Proceedings of the STLE/ASME 2010 International Joint Tribology Conference, IJTC2010
  • Peer Reviewed
• [Journal Article] Pumping effect of slider air bearing surface for non-langmuir adsorption (2010)
  • Author(s): Bo Zhang, Akira Nakajima
  • Journal Title: Proceedings of the STLE/ASME 2010 International Joint Tribology Conference Volume: IJTC2010
  • Peer Reviewed
• [Journal Article] Rheology of Nano PFPE Liquid Film at Hard Disk Surfaces under Blow Off Flow (2010)
  • Author(s): Bo Zhang, Hiroshi Chiba, Akira Nakajima
  • Journal Title: International Tribology Congress-ASIATRIB 2010 Volume: ASIATRIB 2010
  • Peer Reviewed
• [Presentation] 磁気ヘッド浮上挙動のその場観察に関する研究 (2012)
  • Author(s): 藤田 貴士、石田 誠也、馬渡 俊文、張 波
  • Organizer: 2012年度精密吸着物 工学会秋季大会学術講演会論文集(九州工業大学戸畑キャンパス
• [Presentation] 磁気ヘッド浮上挙動のその場観察に関する研究 (2012)
  • Author(s): 張波
  • Organizer: 2012年度精密工学会秋季大会学術講演会論文集
  • Place of Presentation: 九州工業大学戸畑キャンパス
• [Presentation] 磁気ヘッド・ディスク界面のその場観察によるトライボロジカル特性の解明 (2011)
  • Author(s): 佐藤 潤二郎、張 波、馬渡 俊文
  • Organizer: 日本設計工学会2011年度春季研究発表講演会
  • Place of Presentation: 日本大学
  • Year and Date: 2011-05-28
• [Presentation] 磁気ヘッド・ディスク界面のその場観察によるトライボロジカル特性の解明 (2011)
  • Author(s): 佐藤潤二郎、張波、馬渡俊文
  • Organizer: 日本設計工学会2011年度春季研究発表講演会
  • Place of Presentation: 日本大学津田沼キャンパス
  • Year and Date: 2011-05-28
• [Remarks]
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• [Remarks] http://evalwww.cc.saga-u.ac.jp/search
• [Remarks]
  • URL: http://evalwww.cc.saga-u.ac.jp/search/IST?ISTActId=FINDJPDetail&userId=1530
• [Remarks]
  • URL: http://evalwww.cc.saga-u.ac.jp/search/IST?ISTActId=FINDJPDetail&userId=1530