Influence of grain size on the strength of ceramics made from hafnium dioxide partly stabilized with yttrium oxide

The strength of fine-grained ceramics made from hafnium oxide with an addition of 3–5% Y2O3 largely depends on the size of the component grains. Ceramic with a grain size of about 1 μm containing 4% Y2O3 has a bending strength of about 480 N/mm2, which is twice as high as for ceramics made of cubic HfO2.