METHOD OF PRODUCING COMPOSITE MATERIAL BASED ON AlO -TiCN Russian patent published in 2019 - IPC C01G23/00 C01B32/921 C01B21/72 C01B21/76 C30B29/38 C01F7/02 

FIELD: technological processes.

SUBSTANCE: invention relates to production of composite material based on Al₂O₃-TiCN and can be used in tool industry in production of replaceable multi-faceted cutting plates. To produce composite material, method includes preparation of powder mixture of charge consisting of powder α – Al₂O₃, doped with 0.5–1.0 wt% Y₂O₃ and 0.1–0.5 wt% MgO, and TiCN powder, with the following ratio of components, wt%: 60–80 α – Al₂O₃ and 20–40 TiCN. Made from initial Al₂O₃ and TiCN powders aqueous suspensions with subsequent dispersion. Suspensions are mixed in ball mill. Polyvinyl alcohol is added in 1 wt%, powders are granulated by spraying the finished suspension into liquid nitrogen with subsequent freeze drying. Blanks are formed by method of preliminary axial pressing and final hydrostatic pressing. Aluminum nitride coating on Al₂O₃ particles is obtained at pressing presses from room temperature to 1,450 °C in nitrogen flow with holding at maximum temperature of 1–4 hours. Composite material is sintered in argon medium at temperature 1,800 °C.

EFFECT: higher bending strength, hardness and crack resistance of composite material.

1 cl, 4 dwg