Silicon nitride combined with silicon carbide brick production widely uses the reaction sintering method,namely the elemental silicon powder mixed with silicon carbide sintered under nitrogen atmosphere and the production of silicon nitride.In the production process,the forming bulk density has an important influence on the nitridation reaction and the properties of the brick.This paper mainly studies the influence of forming bulk density on physical properties,chemical composition and electrolyte erosion resistance of Si3N4 bonded silicon carbide bricks.The results show that the physical properties and electrolyte erosion resistance of the samples improve with the increase of bulk density,while the content of Si3N4 in the samples decreases.

"> Si₃N₄-SiC, Bulk desity, Resistance to electrolyte erosion