Exothermic synthesis and consolidation of single-phase ultra-high temperature composite Ta4ZrC5

Abstract

The paper presents the experimental results of possibility obtaining ultra-high temperature composite Ta 4 ZrC 5 using a single-stage method. The method is based on the use of exothermic synthesis of refractory compounds by electro-thermal explosion (ETE) and their consolidation under conditions of quasi-isostatic compression. The effect of mechanical activation of the reaction mixture of tantalum, zirconium and carbon powders on the formation of the phase composition of the ceramic composite Ta 4 ZrC 5 was studied. The conditions for obtaining a single-phase ultra-high temperature composites had were determined. The composites were prepared with the average particle size of 1-2 µm and a residual porosity of 8-10%.