Effect of in situ formation of Ti(C,N) on the properties of Al ₂ O ₃ –ZrO ₂ –C slide plate material

Abstract Al ₂ O ₃ –ZrO ₂ –C slide plate was ordinarily used in sliding nozzle system because of its excellent mechanical properties and slag corrosion resistance. This study improved the slag corrosion resistance of the slide plate by the carbothermic reduction of TiO ₂ and aluminothermic reduction of TiO ₂ under high temperature in coke bed to generate Ti(C,N) phase in situ. The result revealed that TiC of the high melting point phase could enter into anorthite (CaAl ₂ Si ₂ O ₈ ) of the low melting point phase, forming eutectic phase CaAl ₂ Si ₂ O ₈ –TiC, and improve the viscosity of the slag. Furthermore, TiC and CaAl ₂ Si ₂ O ₈ captured FeO and MnO from the slag, resulting in the increase of the slag viscosity, inhibiting the penetration corrosion of the slag, and improving the slag corrosion resistance of the materials. In general, compared with the material without TiO ₂ powder, the slag corrosion resistance of the material introduced 2 wt.% TiO ₂ powder was increased by 24%. Meanwhile, the cold crushing strength of fired specimen at room temperature was increased by 35.6%.