Originally posted by JohnWW
Carbides can be used as refractories only if they are kept away from the presence of air at high temperatures. Metal or Si or B carbides would be
largely oxidized to metal oxides and silicates and B2O3, with the C going off as CO or CO2; and may also partly react with N2 to form cyanogen, (CN)2,
and often brittle metal nitrides. |