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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 19990914-17; Leeds(GB) >HIGH SHEAR RATE RESPONSE OF THIN LUBRICANT FILMS IN A SLIDER-DISK INTERFACE
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HIGH SHEAR RATE RESPONSE OF THIN LUBRICANT FILMS IN A SLIDER-DISK INTERFACE

机译：滑盘界面薄润滑膜的高剪切速率响应

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摘要

Previous friction measurements in a slider-disk interface with film thicknesses on the scale of 10-100 nm showed unusual results in that the friction force was found to decrease with increasing sliding speed above a certain speed for a given lubricant viscosity and applied film thickness. No clear physical explanation has yet been established for this anomalous behavior. In the present study, friction measurements are conducted on a magnetic head slider in conjunction with electrical impedance measurements across the film, which provide an in situ measure of the slider-disk spacing. The experimental measurements are used together with models of lubrication and capacitance to solve iteratively for the slider equilibrium configuration. It is found that above a certain shear rate for a given nominal viscosity the lubricant undergoes a change in character whereby it no longer appears to behave as a homogenous viscous liquid.
机译：先前在具有膜厚度为10-100 nm的滑块-磁盘界面中进行摩擦测量显示了不同寻常的结果，因为在给定的润滑剂粘度和所施加的膜厚度下，发现摩擦力会随着滑动速度的增加而降低，并超过一定速度。对于这种异常行为，尚未建立明确的物理解释。在本研究中，在磁头滑块上进行摩擦测量，并在整个薄膜上进行电阻抗测量，从而提供滑块盘间距的原位测量。实验测量值与润滑和电容模型一起使用，以迭代方式求解滑块平衡构造。已经发现，对于给定的标称粘度，在一定的剪切速率之上，润滑剂经历了特性变化，由此其不再表现为均匀的粘性液体。

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