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Magnesia–carbon bricks collected from steel plants kept in open atmosphere were found to crack and disintegrate on prolonged exposure. To understand the mechanism of this behaviour, MgO–C–Al and Al–C samples were prepared, coked, and kept in open atmosphere. The samples crumbled to dust after few days. XRD showed the reduction of phases such as Al 4 C 3 , Al 4 O 4 C,...
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