| 摘要 |
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 900-1000C. Sintering of the workpieces formed from said powder is carried out in the region of existence of a tetragonal phase: sintering to temperature 1300-1350C is carried out while heating at a rate of 750-1000C per hour, holding for 2-3 hours and subsequent cooling at a rate of 1000-1100C 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 |
