POLYCRYSTALLINE MATERIAL, METHOD AND DEVICE FOR PRODUCTION OF SUCH MATERIAL AND ARTICLE MADE FROM SUCH MATERIAL Russian patent published in 2003 - IPC

FIELD: production of new high-strength materials on base of zirconium dioxide which may be used for manufacture of articles working at high loads, such as wear-resistance cutting instruments for medicine engineering. SUBSTANCE: material includes tetragonal crystallites of zirconium dioxide of needle or plate form not exceeding 0.05 mm in size at ratio of length to maximum cross section no less than 2:1; they are oriented in parallel relative to their longer axes, thus forming rectangular lattice. Material is obtained by melting in cold container at horizontal motion of container relative to inductor. Invention enhances stability of material to beginning of cracking due to change of structure of material. High physico-mechanical parameters of material make it possible to manufacture high-sharp scalpels from it increasing service life of knives to 60 operations and allowing 10 resharpening cycles with no change in scalpel profile. EFFECT: enhanced efficiency and reliability. 13 cl, 11 dwg, 1 tbl