METHOD OF PRODUCING WEAR RESISTANT CERAMIC Russian patent published in 2011 - IPC C04B35/486 C04B35/622 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing wear resistant ceramic based on zirconium dioxide which is partially stabilised with yttrium oxide, and can be used in making components for tribological application as a draw plate, draw ring, bearings etc. The method employs chemical deposition of zirconium and yttrium hydroxides from a mixture of salts with specific surface area of not less than 200 m²/g, with further thermal treatment of powder at temperature 900-1000°C. Sintering of the workpieces formed from said powder is carried out in the region of existence of a tetragonal phase: sintering to temperature 1300-1350°C is carried out while heating at a rate of 750-1000°C per hour, holding for 2-3 hours and subsequent cooling at a rate of 1000-1100°C per hour. Fast raising and sharp cooling enable to obtain a ceramic with size of structural elements of up to 200 nm and with 100% content of tetragonal crystalline phase.

EFFECT: high wear resistance of the ceramic in conditions of dry friction in a pair with steel.

2 cl, 1 tbl