Abstract
A novel stabilizer coating technique was applied to prepare 1.0 mol% Nd 2O 3+1.0 mol% Y 2O 3-co-coated ZrO 2 nanopowder from an alcohol/water-based suspension of neodymium nitrate, yttrium nitrate and monoclinic zirconia powder. The low stabilizer content starting powder could be fully densified into a (1Nd,1Y)-TZP ceramic when pressureless sintering in air at 1450 °C. The obtained ceramic revealed an excellent fracture toughness of 12.5 MPa m 1/2 in combination with a hardness of 10 GPa, a combination of properties that is comparable with that of the traditional 12 mol CeO 2-stabilised tetragonal zirconia polycrystalline (TZP). The toughness could be further increased up to 14.3 MPa·m 1/2 by the addition of 2 wt.% Al 2O 3 to the starting powder.
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