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1.
Tribo-chemical studies of the lubricant thickness effect on the tribology of the head/disk interface (HDI) were conducted
using hydrogenated (CHx) carbon disk samples coated with perfluoropolyether ZDOL lubricant. The studies involved drag tests with uncoated and carbon-coated
Al2O3–TiC sliders and thermal desorption experiments in an ultra-high vacuum (UHV) tribochamber. The studies showed that the lubricant
interaction with the carbon overcoat varies as a function of lubricant thickness. Wear durability improves considerably for
thicknesses more than a monolayer. However, in the sub-monolayer thickness regime, the adhesion of the lubricant to the carbon
overcoat is much stronger, as indicated by the fact that a much higher temperature is required to desorb the lubricant. When
the lubricant thickness is around or above a monolayer, cohesion among the lubricant molecules plays a greater role and a
much lower temperature is needed for lubricant desorption.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
2.
Tribochemical studies of the effect of lubricant bonding on the tribology of the head–disk interface (HDI) were conducted using hydrogenated (CHx) carbon disk samples coated with perfluoropolyether ZDOL lubricant. The studies involved drag tests with uncoated and carbon-coated Al2O3–TiC sliders and also thermal desorption experiments in an ultrahigh vacuum (UHV) tribochamber. The friction and catalytic decomposition mechanisms as well as the thermal behavior of ZDOL are described. We observed that a larger mobile lubricant portion significantly enhances the wear durability of the HDI by providing a reservoir to constantly replenish the lubricant displaced in the wear track during drag tests. In the thermal desorption tests we observed two distinct temperatures of desorption. The mobile ZDOL layer is desorbed at the lower thermal desorption temperature and the residual bonded ZDOL layer is desorbed at the higher thermal desorption temperature. 相似文献