磁盘表面质量及磁头力学特性的声发射研究

应用科学学报 ›› 1989, Vol. 7 ›› Issue (4): 371-373.

磁盘表面质量及磁头力学特性的声发射研究

张鸿天¹, 柏森¹, 方光旦²

1. 中国科学院金属研究所;
2. 中国科学院计算技术研究所

收稿日期:1988-03-14 修回日期:1988-09-21 出版日期:1989-12-31 发布日期:1989-12-31

ACOUSTIC EMISSION INVESTIGATION ON SURFACE QUALITY OF MAGNETIC RECORDING DISK AND MECHANICAL PERFORMANCE OF MAGNETIC HEAD

ZHANG HONGTIAN¹, BAI SEN¹, FANG GUANGDAN²

1. Institute of Metal Research, Academia Sinica;
2. Institute of Computing Technology, Academia Sinica

Received:1988-03-14 Revised:1988-09-21 Online:1989-12-31 Published:1989-12-31

摘要/Abstract

摘要： 存贮位密度是磁盘的主要性能指标之一.由经典公式知道,位密度D满足下面关系:1/D~√(α+h)²+(g/2)²式中α和g分别由磁层的特性和磁头的结构所决定.因此,提高磁盘存贮的位密度,降低磁头的浮动高度h是重要手段之一.事实上,经严格抛光处理的磁盘表面,仍存在着妨碍磁头浮动高度降低的小突起.它们非常细小,以至用常规方法很难检测.有人曾研究用声发射方法进行检测^[1~3].

Abstract: For increasing the recording density of the magnetic recording disk, the flying height of the magnetic head has to be reduced. This is very difficult as there are many protrusions on the disk which are difficult to inspect.
This paper presents the magnetic disk testing system monitored by acoustic emission. Based on the receiving signals, the surface quality of the disk could be evaluated.
In addition, by using the AE system, the processes of removing protrusions on the disk could be monitored, and the characteristics of the taking off and landing of the magnetic head could be observed.

张鸿天, 柏森, 方光旦. 磁盘表面质量及磁头力学特性的声发射研究[J]. 应用科学学报, 1989, 7(4): 371-373.

ZHANG HONGTIAN, BAI SEN, FANG GUANGDAN. ACOUSTIC EMISSION INVESTIGATION ON SURFACE QUALITY OF MAGNETIC RECORDING DISK AND MECHANICAL PERFORMANCE OF MAGNETIC HEAD[J]. Journal of Applied Sciences, 1989, 7(4): 371-373.