Abstract
To balance performance and cost, binary gas mixtures such as air-helium are currently being investigated as candidates for use in advanced drives. The amount of accumulated lubricant is determined by evaporation from the disk and slider, condensation on the slider and lube transfer. The increase in helium fraction ratio leads to the decrease in lube transfer and the amount of total lube pick-up is increased dramatically. Therefore, the HDI problems induced by the lubricant pick-up should be considered in helium-filled drive.
