Influence of the Mechanical Activation of Reaction Mixture on the Formation of Microstructure of ZrB2–CrB Composites Obtained by Electrothermal Explosions under Pressure

Resumo

The ZrB₂–CrB composites with a ceramic bond content of 80 wt.% and a relative density of 0.85 – 0.90 were obtained by the method of electrothermal explosion under pressure. It is shown that the mechanical activation of the source powder mixture decreases its heterogeneity and increases its reactivity.We also obtained a finely divided ceramic composite with homogeneous microstructure containing needle-like ZrB₂ grains.