Co-Al2O3 cermet was prepared by combustion synthesis

in which diluent Al2O3 and reactive agent TiO2 was added to control the combustion synthesis reaction process. Meanwhile

the effects of diluent Al2O3 and reactive agent TiO2 on microstructure of cermet have been approached. The hollow Co-Al2O3 cermet parts with fine and uniformly distributed metal phase in the Al2O3 matrix is successfully prepared by controlling initial reactive temperature of thermo-explosive reaction at about 1 050 K using Al-Fe2O3 assistant system.