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

基于Langmuir吸附抽运效应的理论分析表明：1。根据参数λ的取值，泵送效果可分为两类：λ<0.1时的剪切流量控制泵送效果和λ>0.4.2时的吸附速率控制泵送效果。当λ>10时，由于吸附膜很薄，吸附分子在滑块表面的分布很稀疏，因此应采用分子动力学方法来分析吸附分子在滑块表面的运动，而不是像本文提出的那样采用连续介质。当λ<0.1时，污染物的积累速率与圆盘表面速度成正比，而与滑块的飞行高度成反比。有起飞载荷和着陆载荷，空气轴承通常只在载荷之间起作用。起飞载荷对应预载荷，着陆载荷对应承载能力。起飞载荷随磁盘速度的增加略有增加，而着陆载荷随磁盘速度的增加而减小。

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.