Fabrication of ceramic composites by directed metal oxidation

Abstract

To explain the growth mechanism of Al₂O₃/Al Lanxide composites, the dynamics of the directed oxidation of Al−Mg−Si alloys are analyzed. The experimental methods to produce Lanxide composites by directed oxidation of metal melts at high temperatures are presented. The effect of the processing factors on the microstructures and properties of Al₂O₃/Al composites and enforced Al₂O₃/Al composites is also analyzed. Compared with sintering ceramic composites, the advantages of Lanxide process and Lanxide materials are as following: it is a near net shaped process; the process is very simple; the microstructures and properties of Lanxide materials can be adjusted; and this process can be used to infiltrate ceramic fiber or particle preforms.

Keywords

composites / ceramic / directed oxidation / Al₂O₃/Al / alloy

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