As magnetic data storage technology moves towards higher areal density with lower living heights and higher rotational speeds, the propemisitv of random contacts at the head-disk interface is bound to increase. The tribological performance of the head-disk inlerkice will have significant impact on the periormance and clurahililv of the liarS disk drive. A high-speed impact test method has been developed for evaluating nanometer-thick lubricant film/carbon overcoat materials on hard-disk surfaces. and a three-dimensional finite element model has heeii constructed to calculate the stress concentrations and the effect of material parameters on the resulting deformation. The aiiilahilitv of an experiizwntal technique and a model enables effective screening of different material chemistries and lubricant combinationns to improve the level of protection for hard disk teclinolog.
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