106 潤滑剤が介在する回転・接触摺動におけるサスペンションの動的現象

概要

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Aiming at an ultra-high area density over 100 Gbits/in^2 reduction of magnetic spacing will become very important for hard disk systems. one solution is a full contact recording system. However, contact sliding induces large friction, bouncing and abrasion. In this paper, we measure dynamic phenomenon of single beam suspension of two types of slider that was on a lubricated rotary disk surface. The single beam with a ball slider indicated stable contact at the early stage of the test. But, Rubricate film soon breaks and bouncing of the beam occurred. The single beam with a flat slider causes stick-slip and vibration. However, since the flat slider has many contact points the lubricant film does not break, hence stable contact sliding continues without any fluctuation. Dumping effect and meniscus force of the lubricant are keys to suppress slider bouncing. It may be thought that requirements for the lubricant may be a rather high viscosity for the ball slider, anti-stick properties for the flat slider.
2000-03-24