Research on Toughening Mechanics of Zirconia Toughened Alumina Composite Ceramics

Preparation and cutting performance study of YSZ-toughened PcBN superhard tools

“…Zhao, Du et al 24 analyzed the toughening mechanism of ZrO 2 -toughened Al 2 O 3 ceramics and pointed out that the conversion rate of t-ZrO 2 to m-ZrO 2 is the main factor affecting the ceramic composites. Li, Zhang et al 25 prepared ZrO 2 -doped ZrB 2 –MoSi 2 composites, and the doping of zirconia led to a significant improvement in the mechanical properties of the material with a 50% increase in toughness.…”

“…to ZrO 2 , the phase transformation process of tetragonal zirconia during cooling can be inhibited, which makes the material matrix disperse sub-stable t-ZrO 2 at room temperature, and when the applied load is applied, the substable t-ZrO 2 will undergo the phase transformation process of t / m by stress to produce volume expansion, which inhibits the expansion of cracks within the material matrix under the action of external forces, so that the strength and toughness of the material can be improved. [21][22][23] Zhao, Du et al 24 analyzed the toughening mechanism of ZrO 2 -toughened Al 2 O 3 ceramics and pointed out that the conversion rate of t-ZrO 2 to m-ZrO 2 is the main factor affecting the ceramic composites. Li, Zhang et al 25 prepared ZrO 2 -doped ZrB 2 -MoSi 2 composites, and the doping of zirconia led to a signicant improvement in the mechanical properties of the material with a 50% increase in toughness.…”