High temperature oxidation of AZ91D magnesium alloy granule during in-situ melting |
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| Authors: | Hassan Jafari Mohd Hasbullah Idris Ali Ourdjini |
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| Affiliation: | aDepartment of Materials Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;bDepartment of Materials Engineering, Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran 16785-136, Iran |
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| Abstract: | Oxidation behaviour of AZ91D was investigated by heating the alloy granules in a ceramic mould between 650 and 800 °C, for 30 and 60 min. The granules failed to melt in unprotected environment even when the temperature was increased to 800 °C. Raising the temperature increased the oxides thickness linearly, however, oxidation enhanced beyond 750 °C with severe mould–metal reaction and selective oxidation. Heating duration showed more pronounced effect on oxide formation compared to heating temperature. MgO was found to be the dominant compound in oxidation products. Aluminium participated during severe oxidation or combustion to some extent whilst no zinc oxide was detected. |
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| Keywords: | A. Magnesium A. Alloy C. Oxidation C. Selective oxidation |
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