METAL-CERAMIC COMPOSITE AND METHOD OF ITS PRODUCTION (VERSIONS) Russian patent published in 2017 - IPC C22C32/00 C22C21/00 B22F3/15 B22F3/16 

FIELD: metallurgy.

SUBSTANCE: metal-ceramic composite comprises aluminium and a reinforcing additive, wherein the reinforcing additive comprises zirconium tungstate (ZrW₂O₈)_, with the following component ratio, wt %: ZrW₂O₈ 0.1-10.0_, aluminium - the rest. The method for producing a cermet composite includes the preparation of a powder mixture, the shaping and sintering of a billet. The powder mixture is prepared from aluminium powders and nanostructured zirconium tungstate (ZrW₂O₈) or hydroxo aqua zirconium tungstate (ZrW₂O₇(OH)₂*2H₂O), with the following component ratio, wt %: powder ZrW₂O₈ or ZrW₂O₇(OH)₂*2H₂O 0.1-10.0, aluminium powder is the rest, forming and sintering of the workpiece is carried out simultaneously in a single hot pressing cycle at a temperature of 600±25 °C in argon medium with isothermal exposure 10-20 minutes and subsequent rapid cooling to room temperature, and in the second variant, the moulding and sintering of the billet is carried out successively by first cold pressing and then sintering at 600±25 °C in a protective atmosphere with isothermal aging of 60-120 minutes.

EFFECT: development of a metal-ceramic composite with high strength characteristics.

7 cl, 4 ex