SYNTHESIS OF MgAl۲O۴-Ti(C,N) NANOCOMPOSITE BY ALUMINOTHERMIC REDUCTION

MgAl۲O۴/Ti(C,N) composites were synthesized through aluminothermic reaction between Al,TiO ۲,MgO powders and phenolic resin in coke bed condition. Effect of addition of carbon black and sugar into the mixture at different temperatures were investigated. The phases and microstructures of samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). MgAl ۲O۴ /Ti(C,N) composites without additive were obtained after heat treatment at ۱۶۰۰˚C. With addition of carbon black TiC, TiN and Ti(C,N) were appeared after firing at ۱۴۰۰˚C and formation of spinel/Ti(C,N) composites were completed at ۱۶۰۰˚C. In sample containing sugar, MgAl۲O۴ -Ti(C,N) composite were completely synthesized at ۱۴۰۰˚C. In this sample crystallite size of Ti(C,N) were ۳۲ nm and carbon content of titanium carbonitride (Ti(C,N)) reached to ۰.۴۴۲ value.