A new aluminothermic combustion synthesis route to TiB2-Al2O3 composite was
found, using the reactants 2Al(2)O(3)(.)B(2)O(3) (Al4B2O9), TiO2, and Al.
Microwave-driven combustion of these reactants in inert atmosphere yielded
TiB2 + Al2O3 as the only products detected by X-ray diffraction analysis. T
he aluminoborate reactant is not moisture-sensitive or water-soluble, unlik
e boron-containing oxide reactants used previously. (C) 2001 Elsevier Scien
ce Ltd. All rights reserved.