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High-Temperature Oxidation of AZ91D/Y2O3 Magnesium Composites in Air

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The AZ91D magnesium composite containing 3 wt% Y2O3 was cast, and its oxidation behavior was investigated above 430 °C in atmospheric air. It consisted primarily of the α-Mg matrix grains and a small amount of Al12Mg17. Al and Mg in the alloy diffused into the initially added Y2O3 particles to form (Al, Y)O or to dissolve in Y2O3. Although Y2O3 increased the oxidation resistance, the composite still experienced rapid oxidation and burning above 450 °C, because non-protective MgO was the main oxide.
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Keywords: CASTING; COMPOSITES; MAGNESIUM; OXIDATION; TRANSMISSION ELECTRON MICROSCOPY

Document Type: Research Article

Publication date: January 1, 2015

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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