Fabrication and Physical Properties of ZrO 2 (m)-Al 2 O 3 ZrO 2 (t)-Al 2 O 3 Structural Ceramics

The effects of the addition of either monoclinic or tetragonal containing 5.35[wt%] on the physical properties and electrical conductivity of were investigated. The addition of (m) and (t) increased sintered density of . The Vickers hardness also increased as addition of (t) increased going through a maximum at 20[wt%] and the hardness of the specimens was found to be dependent on the sintered density. The addition of (t) improved the hardness of systems and the (m) addition showed the better effect on the thermal shock property of systems than that of the (t) addition. Above 15[wt%] addition of (t), the electrical conductivity is gradually increased with increasing applied voltage but not effects by addition of (m).