Abstract
In this paper, we report mechanical properties of ZrO2-MgO substrate for thin film magnetic head. Two mechanical properties were measured. One is the tribological property and the other is the slicing resistance. In the tribological property test(so-called "Shoe-Shine Test"), the ZrO2-MgO material showed good result compared with the current material (Al2O3-TiC), and also gave no damages against the magnetic media.
On the other hand, the slicing resistance for ZrO2-MgO substrate with less than 84% MgO content was higher two times than for the current material. The sample containing more than 90% MgO, however, showed the same slicing resistance as for the current material. These phenomena were accommodated by the distribution of ZrO2 grains, so that, the low slicing resistance was thought to be due to the separation of each ZrO2 grain. This was also confirmed by measuring the thermal conductivity.
