Properties of CaO-ZrO2 Based Composites

Study of Radiation Damage Kinetics in Dispersed Nuclear Fuel on Zirconium Dioxide Doped with Cerium Dioxide

“…With a growth in the concentration of the CeO 2 dopant to 0.15 mol, the formation of polymorphic phase transformations in the composition of ceramics is observed with the formation of a Zr 0.85 Ce 0.15 O 2 phase with a tetragonal crystal lattice type; the formation of which occurs by the phase rearrangement of the Zr 0.98 Ce 0.02 O 2 monoclinic phase into the tetragonal Zr 0.85 Ce 0.15 O 2 with a rise in the effect of substitution of zirconium for cerium. Such polymorphic phase transformations are typical for the structure of zirconia ceramics when magnesium [45], yttrium [46] or calcium [47,48] oxides are added to it, which results in the initialization of polymorphic transformation processes at lower temperatures (1300-1500 • C), at which no polymorphic transformations are observed in the case of pure zirconia [49].…”

ZrO2 Matrix Toughened Ceramic Material‐Strength and Toughness

“…During the cooling process after sintering, the natural phase transformation from tetragonal phase to monoclinic phase occurs with large volume expansion, which may lead to cracks and other defects. [ 38,39 ] In order to obtain stable tetragonal phase at room temperature, stabilizers are added, such as Y 2 O 3 , [ 40,41 ] MgO, [ 42 ] CeO 2 , [ 43 ] CaO, [ 44,45 ] La 2 O 3 , [ 46 ] etc. The cations of Y 3 + , Mg 2 + , Ce 4 + , Ca 2 + , La 3 + can be partially dissolved into ZrO 2 ceramics, forming a substitutional solid solution, and preventing the spontaneous tetragonal‐monoclinic phase transition.…”