Influence of CrO3 Additive on the Thermite Reaction Procedure in Fe2O3+Al System

Abstract

Abstract: A hercynite-free ceramic lined steel pipe was fabricated by the self-propagating high-temperature synthesis
gravitational-thermite process(SHS G-T Process). The sequence of some reactions which are possible to take place in the aluminothermic system
was determined by thermodynamic analysis, i.e. CrO₃>Fe₂O₃>Fe₃O₄>FeO>FeAl₂O₄>Cr₂O₃. The results show that in Fe₂O₃+Al system
CrO₃ reacts with Al in two steps. This gives the possibility of elimination of FeAl2O4 phase, which is more reactive than Cr₂O₃.

Key words: self-propagating high-temperature synthesis, thermodynamics, CrO₃, FeAl₂O₄

CLC Number:

TG174

WANG Shuang-Xi,LIANG Kai-Ming,ZHANG Xian-Hui,XU Wei. Influence of CrO₃ Additive on the Thermite Reaction Procedure in Fe₂O₃+Al System[J]. Journal of Inorganic Materials.

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Influence of CrO₃ Additive on the Thermite Reaction Procedure in Fe₂O₃+Al System

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