Effect of phosphazene-type additive X-100 on the tribological performance of Z-DOL at the head/disk interface

This paper investigates the effect of X-100, a newly developed phosphazene- type additive, on the tribological performance of Z-DOL, the primary disk l ubricant. Contact start stop testa and constant speed drag tests were perfo rmed at both ambient and hot/wet conditions to evaluate the stiction and we ar behavior of Z-DOL/X- 100 mixtures and compare its performance with that of Z-DOL. In addition, the thermal degradation behavior of Z-DOL and Z-DOL/ X-100 mixtures was analyzed using thermogravimetric analysis in the presenc e of Al2O3, a head material component. It was found that X-100 reduces stic tion and improves the wear performance of ZDOL, and that X-100 is similar t o the phosphazene X-1P in improving the stiction performance of Z-DOL. Beca use X-100 has better solubility than X-1P in Z-DOL, X-100 is a promising ad ditive to be used with Z-DOL in place of X-1P.