Study of the microstructure and mechanical properties of composites fabricated by the reaction method in an Al–TiO2–B2O3 system

This paper investigates the microstructure, mechanical properties and fracture mechanism of composites fabricated by the exothermic dispersion method in the Al–TiO2–B2O3 reaction system. When the B2O3/TiO2 mole ratio is zero, the reinforcements of the composites are composed of α-Al2O3 and Al3Ti. The α-Al2O3 particulates are segregated at matrix boundaries and cannot enter the aluminum matrix grains due to poor wetting with the matrix and the...