METHOD OF PRODUCING CERAMIC ARTICLES WITH NANOSTRUCTURE Russian patent published in 2011 - IPC B22F3/23 B22F3/20 B82B3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of ceramic articles with nanostructure by self-propagating high-temperature synthesis (SHS), and extrusion. Articles thus produced may be used as cutting tools, targets for composite coat application, electrodes for electric spark alloying, etc. Exothermic mix containing powders of TiO₂, C, B, Al, Zr, with particle size of 1-100 mcm is used to form the billet. Produced billet is heated to 100-150°C, reaction of combustion in SHS conditions is initiated at 0.01-0.5 MPa, and combustion products are extruded. Note here that ratio of components for production of target products is as follows in wt %: TiB₂ - 22-25; TiC - 20-30; 35-44.5 - (Al₂O₃-ZrO₂) eut.; (ZrO₂)β making the rest.

EFFECT: ceramic articles that feature high wear-, heat- and corrosion resistance, micro hardness and low porosity.

1 dwg, 1 tbl