Microtribodynamics of pseudo-contacting head-disk interfaces intended for 1 Tbit/in/sup 2/
Microtribodynamics of pseudo-contacting head-disk interfaces intended for 1 Tbit/in/sup 2/
复制标题
适用于 1 Tbit/in/sup 2/ 的伪接触头盘接口的微摩擦动力学
DOI：
10.1109/tmag.2004.840355
复制
发表时间：
2005
影响因子：
2.1
通讯作者：
A. Polycarpou
中科院分区：
文献类型：
--
作者：
Sung;A. Polycarpou
随着磁记录滑块和高速旋转磁盘之间的距离减小到几个纳米，了解磁头-磁盘界面上的摩擦学和动力学相互作用是至关重要的。这种相互作用涉及表面形貌、粘着、摩擦和系统动力学耦合，称为微摩擦动力学。建立了一个包括真实粗糙度、粘附力和摩擦力的两自由度非线性动力学模型，以及飞行和接触HDI的动力学模型，以描述拟接触式HDI，其设计目标为1Tit/in/sup 2/。完全飞行的HDI旨在避免接触，而伪接触记录系统设计为使用空气轴承在几纳米处飞行，同时空气轴承表面的一些特征被设计为在操作过程中与旋转磁盘接触。该模型与可飞性测量结果进行了比较，并应用于伪接触界面，研究了粘附力、摩擦力、接触力以及弹跳振动。与以前采用简单库仑摩擦的研究不同，本文使用的摩擦模型计算了界面处的摩擦力，考虑了粗糙度和粘附力。研究发现，与完全飞行的HDI不同，附着力通过减少反弹振动，在实现伪接触记录方面起到了积极的作用。
As the distance between the magnetic recording slider and the high-speed rotating disk decreases to few nanometers, it is critical to understand the tribological and dynamic interaction at the head-disk interface (HDI). Such interaction involves surface topography, adhesion, friction, and system dynamic coupling and is termed microtribodynamics. A two degree-of-freedom nonlinear dynamic model that includes realistic roughness, adhesion, and friction, as well as the dynamics of a flying and contacting HDI was developed to characterize a pseudo-contacting HDI, intended for 1 Tbit/in/sup 2/. While a fully flying HDI is intended to avoid contact, a pseudo-contact recording system is designed to fly at few nanometers using an air-bearing and at the same time some features of the air-bearing surface are designed to contact with the rotating disk during operation. The model was favorably compared with flyability measurements, and then applied to a pseudo-contacting interface to investigate adhesion, friction, and contact forces as well as bouncing vibration. Contrasting earlier studies adopting a simple Coulomb friction, the friction model used in this work calculates the friction force at the interface, accounting for roughness and adhesion. It was found that unlike a fully flying HDI, adhesion plays a positive role in attaining pseudo-contact recording by reducing bouncing vibrations.