Abstract
The possibility of low-temperature in-situ synthesis of (Ti, W)C ceramics from plasma-chemical nanopowders of tungsten carbide and commercial micron-sized titanium carbide powders has been demonstrated. Sintering/synthesis of WC – (25, 50, 75) wt. % TiC ceramics was carried out by spark plasma sintering (SPS) by heating powders at a rate of 50 °C/min in vacuum under conditions of application of a voltage of 70 MPa, to a temperature of more than 1200 °C. It has been established that the synthesis proceeds most efficiently in nanopowders with the addition of 50 and 75 wt. % TiC. It is shown that the joint application of plasma-chemical synthesis of nanopowders and the SPS method makes it possible to obtain fine-grained ceramics with increased density and satisfactory mechanical properties (Vickers hardness 17 – 18 GPa, minimum crack resistance coefficient according to Palmquist ~ 3 MPa·m1/2).
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