FIELD: chemistry.
SUBSTANCE: invention relates to technical ceramics in the form of a composite SiC-TiN material. Method comprises hot pressing the powder mixture. As a powder mixture use mixture containing 53–83 % by weight of silicon carbide powder, 5–40 % by weight of titanium powder and 7 % by weight of sintering aid powder in the form of Y2O3-Al2O3-ZrO2 or Y2O3-Al2O3 in the ratio of 3:5. In the process of hot pressing provide a combination of sintering and nitriding of the powder mixture at a temperature of 1,600 °C in nitrogen atmosphere for 30 minutes at a pressure of 30 MPa, then the temperature is raised to 1,850 °C and hold the shutter for 30 minutes to obtain a composite material of the main phases of SiC and TiN.
EFFECT: ensure high strength and hardness of the ceramic material.
1 cl, 1 tbl, 1 dwg
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