CERAMIC COMPOSITE MATERIAL Russian patent published in 2019 - IPC C04B35/488 C04B35/626 B82Y40/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to ceramic material science, obtaining a composite material with a zirconium dioxide matrix stabilized in tetragonal form and aluminum oxide. Material can be used for making structural and medical products, particularly orthopedic dentistry. Ceramic composite material is based on a charge having chemical composition (wt%): 68.5≤ZrO₂≤77.5; 14≤CeO₂≤16; 6≤Al₂O₃≤16.5; 0.5≤CaO≤1.0, contains tetragonal zirconium dioxide, stabilized with cerium (Ce)-TZP cations, aluminum oxide (corundum) and [CaCe]Al₁₂O₁₉ (calcium-cerium hexaaluminate) at the following phase ratio (vol%): 78÷87 (Ce)-TZP, 7÷17 [CeCa]Al₁₂O₁₉, the rest – corundum. Ceramic material has static bending strength of not less than 900 MPa, K_1s=12 MPa∙m^½ microhardness 7.5–8.5 GPa and preserves strength characteristics after hydrothermal treatment test according to ISO 13356 (4.8 Accelerated Aging Test).

EFFECT: high crack resistance and strength while reducing the microhardness of the ceramic composite material with a zirconium dioxide matrix.

1 cl, 4 dwg, 1 tbl, 3 ex