Wear and Boundary Lubrication of Oxide Coated Magnetic Disks

在磁盘文件和磁带驱动器中，读/写元件通过稀薄的空气轴承与磁性介质分开。在目前最先进的磁盘文件中，空气轴承的飞行高度约为0.33微米，减少到小于0.2微米在不久的将来是不可能的。在这些小间隔中，读/写头和磁介质之间的接触是不可避免的。此外，在文件的开始/停止期间以及在寻轨期间发生接触。由于这些接触会导致磁头/磁盘接口磨损，因此需要彻底了解磁头/磁盘摩擦学，并且在设计单个部件时必须格外小心，以保证足够的寿命。本课题主要研究氧化物涂层硬磁盘的磨损和边界润滑机制。将在无润滑和有润滑的磁介质上进行摩擦磨损试验，并设计加速磨损试验。将使用分析表面仪器来研究润滑剂在磁盘上的分布，并对磁头/磁盘磨损机理进行理论建模。

In magnetic disk files and tape drives, the read/write element is separated from the magnetic medium by a thin air bearing. In present "state of the art" disk file, the air bearing flying height is approximately .33 um, and a reduction to less than .2 um is anticapated in the near future. At those small spacings, contacts between the read/write head and the magnetic medium are unavoidable. In addition contacts occur during start/stop of the file and during track seeking. Since these contacts cause wear of the head/disk interface, a thorough understantding of head/disk tribology is required, and extreme care must be exercised in the design of the individual components to guarantee sufficient life time. This project is concerned with the mechanisms of wear and boundary lubrication of oxide coated rigid magnetic disks. Friction and wear experiments will be conducted on unlubricated and lubricated magnetic medium, and accelerated wear tests will be designed. Analytical surface instrumentation will be used to investigate lubricant distribution on the disk, and theoretical modeling of the head/disk wear mechanism will be conducted.