; Liang, Y.
; Ge, S.
; Nie, J.
; Liu, Z.
Improved Corrosion Resistance of Al2O3-SiC-C Castables Due to In
Situ Synthesized TiC/TiN
Interceram 65 (2016)  244-249
In order to improve the corrosion resistance of Al2O3-SiC-C castables, super-
fine TiO2 (SFT) powder was added directly to the castable with the
aim of synthesizing TiC/TiN through in situ reactions. Thermodynamic
calculations carried out by FactSage suggested that it was possible to
synthesize TiC/TiN through in situ reactions. Analysis performed by X-ray
diffraction (XRD) and a scanning electronic microscope equipped with an
energy diffraction spectrum analyzer (SEM-EDS) indicated that TiC/TiN
was synthesized in the Al2O3-SiC-C castable. The corrosion resistance of
Al2O3-SiC-C castables with and without 2 mass-% SFT was compared after
a static crucible corrosion test with the assistance of SEM-EDS and XRD.
It was clear that the corrosion resistance of Al2O3-SiC-C castables with
added SFT was much better than that without added SFT. This might be
associated with the location of the in situ-formed TiC/TiN solid particles in
the liquid slag, which would prevent the penetration of molten slag into
the structure through their effect on the viscosity increment of liquid slag.
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