磁头-磁盘界面中亚单层润滑剂的物理学原理

IF 3.1 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Kyosuke Ono
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引用次数: 0

摘要

本综述介绍了一系列研究,这些研究表明,现代磁盘中使用的稀薄流动润滑油膜的扩散特性可以用基于连续介质力学的新型扩散理论来评估,而稀薄薄膜的半月板力是磁头-磁盘界面上的主要相互作用力。首先说明了传统扩散和脱开压力方程的局限性,并提出了稀薄液体薄膜的扩散和脱开压力方程,表明扩散系数与实验结果十分吻合。实验中,半径分别为 1 毫米和 2 毫米的玻璃球与不同膜厚的磁盘相撞,结果表明只有在分离处才测得类似于静态半月板拉力的吸引力。此外,对带有亚单层液膜的球面和平面之间的弹性半月板接触进行的数学分析表明,最大粘附力等于半月板拉脱力,而且随着液膜厚度的减小,接触特性变得与 JKR 理论相似。此外,还提出了亚单层液膜的基本物理模型,以证明连续数学方程的合理性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physics of the Sub-Monolayer Lubricant in the Head-Disk Interface
This review presents a series of studies which have demonstrated that the diffusion characteristics of rarefied mobile lubricant films used in modern magnetic disks can be evaluated by a novel diffusion theory based on continuum mechanics, and that the meniscus force of the rarefied film is the major interaction force at the head-disk interface. The limitations of the conventional diffusion and disjoining pressure equations are first shown, and diffusion and disjoining pressure equations for rarefied liquid films are proposed, showing that the diffusion coefficient is in good agreement with the experiment. The experiment, in which glass spheres with radii of 1 and 2 mm collided with magnetic disks of different film thicknesses, showed that attraction similar to the pull-off forces of a static meniscus was measured only at the separation. Furthermore, mathematical analysis of the elastic meniscus contact between a sphere and a plane with a submonolayer liquid film showed that the maximum adhesion force is equal to the meniscus pull-off force and that the contact characteristics become similar to those of the JKR theory as the liquid film thickness decreases. A basic physical model of submonolayer liquid film is also proposed to justify the continuum mathematical equations.
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来源期刊
Lubricants
Lubricants Engineering-Mechanical Engineering
CiteScore
3.60
自引率
25.70%
发文量
293
审稿时长
11 weeks
期刊介绍: This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding
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