Precipitation of the Eutectic Al2O3–ZrO2 (Y2O3) on the Surface of SiC Particles

Nanosize additives (agglomerate size 30 – 50 nm) of a eutectic composition in the system Al 2 O 3 –ZrO 2 (63 – 37%, molar fraction), containing 4% Y 2 O 3 (above 100%), were obtained by co-precipitation in a SiC suspension followed by vacuum firing. In the process of spark plasma sintering of the obtained powdered compositions, the liquid phase appeared at temperature T r = 1720°C, which is 140°C lower than the temperature of the eutectic in the system Al 2 O 3 –ZrO 2 ( T e = 1860°C).