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The present work considers the possibilities of fabrication of a superhard refractory TiC-based material (cermet) by means of electrothermal explosion (ETE) method combined with pressure compaction and forming an article with a given surface shape. Varying the combustion process during exothermic process stimulated by electric current, one can obtain metal-ceramics composites (cermets) based on fused superhard refractory materials. This task has been accomplished by using ETE method under pressure in the range of high temperatures reaching the melting temperature of titanium carbide, Тm ≈ 3054 K. The process assumes a reduction of the number of technological operations and cheapening of the production. Simplicity of the method and technological effectiveness of the process allow for combining chemical synthesis of the powders, their melting and also forming, i.e. hot pressing. The results of high-temperature synthesis of stoichiometric mixes of titanium, carbon black and iron by ETE method at Т ≈ 3500 K are presented. A TiC – 30 wt. % Fe with average density ρ = 5.15 g / cm3, Vickers microhardness 19.37 GPa has been processed. The time of processing amounted about 7 to 10 s, heating rate 150 K / s at current density j = 14 MA / m2. The composite has been processed in a special die mold, which allows for carrying out exothermal synthesis at a temperature as high as Т ≈ 3500 K and pressure P = 50 MPa with heating rate w = 150 K / s. According to X-ray diffraction and microstructrual analysis, a complete synthesis of precursors occurred and the combustion product represented a two-phase material, i.e. a TiC − 30 wt. % Fe composite (cermet). Round shaped titanium carbide particles indicate on a liquid phase origin of the system. Thus, ETE method allows for a one-stage chemical synthesis, combustion and hot pressing of powders with a preliminarily given surface shape of an article.

TiC–30 wt % Fe composite by pressure-assisted electrothermal explosion