Gas-liquid film lubrication for flying head slider with nanometer spacing by the multi-scale approach

多尺度方法的纳米间距飞头滑块气液膜润滑

• 批准号: 15360085
• 负责人: FUKUI Shigehisa
• 金额: $ 8.58万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360085/
• 关键词: Liquid Thin Film; Surface Tension; Molecular Force; Meniscus Force; Long Wave Equation; Head-disk Interface; Molecular Gas-film Lubrication; Nanotribology; ナノトライボロジー; マイクロトライボロジー; 分子気体潤滑(MGL); 分子液体潤滑; ファンデルワールス力; メニスカス力; 磁気ディスク装置; 浮動形磁気ヘッド

In this research project, four researches are planned and executed ; 1)for the analysis and design of the near contact head/disk interface system considering the interactions between a head and a disk with an ultrathin lubricant film, an interfacial model between a sphere and a plane was newly proposed. The spacing at the meniscus forming was obtained by considering the instability of the ultrathin liquid surface. The radius of curvature of the meniscus and the spacing at the meniscus break were obtained by the balance of the disjoining pressure of the ultrathin film and Laplace pressure. The deformation of the solids was supposed to be Hertzian and the van der Waals force between multilayers was also considered when the surfaces do not contact with each other, 2)the deformation characteristics of the ultrathin liquid film surface considering the effects of polar endgroups were calculated numerically, 3)by the use of the newly corrected equation of the van der Waals force, the static and dynamic characteristics of the flying head sliders for ultra small spacing were numerically analyzed including the van der Waals forces. The CIP (Cubic Interpolated Propagation) method was adopted in order to calculate more accurately, 4) for the investigations of the effects of the contact angle on the dynamic characteristics of the liquid meniscus, the contact angle was controlled by the concentration of an oil repellent.

在本研究项目中，计划并实施了四项研究；1)为分析和设计具有超薄润滑膜的近接触头/盘界面系统，提出了球面与平面的界面模型。考虑了超薄液体表面的不稳定性，得到了半月板形成处的间距。利用超薄膜的分离压力和拉普拉斯压力的平衡，得到了半月板的曲率半径和半月板断裂处的间距。假设固体的变形为赫兹变形，并考虑了多层膜之间的范德华力，当表面不相互接触时，2)数值计算了考虑极性端基影响的超薄液膜表面的变形特性，3)利用新修正的范德华力方程，对超小间距飞头滑块的静、动态特性进行了数值分析，并考虑了范德华力的影响。4)为了研究接触角对液体半月板动态特性的影响，采用了一种驱油剂的浓度控制接触角。

项目成果

H.Matsuoka, S.Ohkubo, S.Fukui: "Dynamic Characteristics Flying Head Slider Considering van der Waals Forces (Analyses Based on the Corrected van der Waals Force Equation for Multilayers)"Proceedings of the 2003 Magnetic Storage Symposium, Frontiers of Mag

H.Matsuoka、S.Ohkubo、S.Fukui：“考虑范德华力的飞头滑块动态特性（基于修正的多层范德华力方程的分析）”2003年磁存储研讨会论文集，Mag的前沿

Analytical Study of Nanodynamics of a Flying Head Slider Considering the van der Waals Forces for Ultrathin Multilayers

考虑超薄多层膜范德华力的飞头滑块纳米动力学分析研究

• 发表时间: 2005
• 期刊: Proc. 2004 Intl. Symposium on Micro-Nano Mechatronics and Human Science
• 作者: H.Matsuoka;H.Kokumai;S.Ohkubo;S.Fukui
• 通讯作者: S.Fukui

Corrected expression of the van der Waals pressure for multilayered system with application to analyses of static characteristics of flying head sliders with an ultrasmall spacing

多层体系范德华压力修正表达式及其在超小间距飞头滑块静态特性分析中的应用

• 发表时间: 2005
• 期刊: Microsystem Technologies Vol.11
• 作者: H.Matsuoka;S.Ohkubo;S.Fukui
• 通讯作者: S.Fukui

松岡広成, 福井茂寿: "近接する複合層に働くファンデルワールス力の汎用的近似式の導出(超微小すきま浮動形磁気ヘッドスライダの静的浮上解析への適用)"日本機械学会論文集,C編. 第69巻・686号. 2810-2817 (2003)

Hironari Matsuoka、Shigehisa Fukui：“作用于相邻复合层的范德华力的一般近似公式的推导（应用于超细间隙浮动磁头滑块的静态悬浮分析）”日本机械工程学会会刊，C版。第 69 卷，第 686 期。2810-2817（2003 年）

Instability Analysis of Ultra-Thin Polar Lubricant Surface

超薄极性润滑剂表面不稳定性分析

• 发表时间: 2005
• 期刊: Proceedings of the ASME-Information Storage and Processing Systems (ISPS) Conference, Santa Clara University
• 作者: S.Fukui;K.Yorino;K.Yamane;H.Matsuoka
• 通讯作者: H.Matsuoka