Abstract
Tensile properties of oxide whiskers-reinforced pure aluminum matrix composites produced by power metallurgy technique were investigated in connection with their microstructures. Reinforcements were aluminum borate, titanium oxide, and potassium titanate whiskers that were added independently to the aluminum matrix. Transmission electron microscopy characterization and the microanalysis clearly showed the interfacial reactants for every composite. The reactivities of aluminum borate and potassium titanate whiskers with pure aluminum are lower than that of titanium oxide whiskers. The interfacial reactants act as anchors to enhance the cohesive force between matrix and fillers. Therefore oxide whiskers reinforced aluminum matrix composites revealed nearly equal tensile properties to SiC whisker-reinforced aluminum matrix composite in the wide temperature range of 300 to 823 K
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