The Adsorption of Slider Air Bearing Surface and the Behavior of Adsorbed Film under Ulta-high Shear Flow

基于朗缪尔吸附的泵浦效应的理论分析表明：1.根据参数λ的大小，泵浦效应可分为两类：λ&lt；0.1中的剪切流控泵浦效应和λ&gt；0.4.2中的吸附速控泵浦效应。当λ&gt；10时，吸附分子在滑块表面的运动应该用分子动力学来分析，而不是本文提出的连续体，因为吸附的薄膜很薄，吸附的分子在滑块表面上分布稀疏。污染物的积累率与磁盘表面速度成正比，但与λ&lt；0.1滑块的漂浮高度成反比。1.对空气轴承起飞和着陆行为的实验表明，1.存在起飞载荷和着陆载荷，空气轴承只有在载荷之间才能正常工作。起飞载荷对应于预载荷，着陆载荷对应于承载能力。起飞载荷随着磁盘速度的增加而略有增加，而着地载荷随着磁盘速度的增加而减少。

Theoretical analysis based on the pumping effect with the Langmuir adsorption shows that,1. The pumping effect may be divided into two classifications depending on the value of the parameter λ: the shear flow rate-controlling pumping effect for λ<0.1 and the adsorption rate-controlling pumping effect for λ>0.4.2. When λ>10, molecular dynamics should be used for analysis of the movement of the adsorbed molecules on the slider surface instead of the continuum such as proposed in this paper, because the adsorbed film is so thin that adsorbed molecules distributes sparsely on the slider surface.3. The accumulation rate of the contaminant is proportional to the disk surface velocity, but inversely proportional to the flying height of the slider for λ<0.1Experiments on the behaviour of the takeoff and touchdown of the air bearing shows that,1. There are takeoff load and touchdown load, and the air bearing functions normally only in between the loads.2. The takeoff load corresponds to the preload, and the touchdown load the load capacity. The takeoff load increases slightly with the disk speed, while the touchdown load decreases as the disk speed increases.