Microstructures and properties of interpenetrating alumina/aluminium composites made by reaction of SiO2 glass preforms with molten aluminium

Interpenetrating Al2O3/Al composites were made by reaction of SiO2 glass preforms with molten Al. The reaction mechanism and growth kinetics of the composites were studied. Microstructural developments were characterized by optical and transmission electron microscopy. Properties such as density, elastic moduli, thermal expansion, hardness, compressive strength and electrical conductivity of the composites were measured. The microstructure property relationships are discussed.