METHOD OF PRODUCTION OF CERAMIC COMPOSITE MATERIAL BASED ON ALUMINIUM AND ZIRCONIUM OXIDES

摘要

FIELD: metallurgy.SUBSTANCE: invention relates to production of the ceramic construction and functional materials. Ceramic composite material based on the aluminium and zirconium oxides are produced by stabilisation in the tetragonal phase of zirconium dioxide by the mechanical method: in activator zirconium salt and stabiliser (rare-earth element salt) are mixed, then mixture is heat treated at temperature 500-600°C for 1-3 hours. Content of rare-earth element oxide is 3-10 mol % of zirconium dioxide content as recalculated to oxides. In the activator the produced stabilised zirconium dioxide and aluminium oxide with addition of magnesium carbonate are individually ground, and mixed. The products are formed by method of axial pressing at pressure 190-300 MPa, and annealing is performed at temperature 1550-1600°C for 1-3 hours. Grinding and mixing of all components are performed in high speed activator upon acceleration of grinding bodies at least 10 g. Wet grinding of mixture of aluminium oxide and magnesium carbonate is performed to particles size below 100 nm.EFFECT: production of ceramics with increased coefficient of crack resistance.8 cl, 3 ex