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Title: The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 550–700 °C
Authors: Wu Kai;I.F. Ren;P.C. Kao;R.T. Huang;C.T. Liu
Contributors: NTOU:Institute of Materials Engineering
Keywords: B. Oxidation;B. Glasses, metallic
Date: 2009-04
Issue Date: 2011-10-20T08:06:28Z
Publisher: Intermetallics
Abstract: Abstract:The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass (Fe7-BMG) and its crystalline counterpart (XFe7) was studied over the temperature range of 550–700 °C in dry air. In general, the results showed that the oxidation kinetics of the Fe7-BMG and XFe7 alloys followed a parabolic-rate law, with their oxidation rates increasing with temperature. It was found that the oxidation rate constants (kp values) of the Fe7-BMG are slightly higher than those of XFe7, indicating that the amorphous alloy underwent a fast oxidation reaction. The scale formed on the Fe7-BMG at 550 °C for 48 h was thin and heterophasic mixture of iron oxides (Fe2O3/Fe3O4) and tetragonal-ZrO2 (t-ZrO2). At higher temperatures (T ≥ 600 °C), duplex scales formed on the glassy alloy consisted of an outer layer of iron oxides (Fe2O3/Fe3O4) and minor amounts of B2O3, and of a heterophasic inner layer of mostly t-ZrO2 intermixed with non-oxidized Fe3B, FeCo, and ZrB12. The formation of the crystalline intermetallics indicated the occurrence of the substrate crystallization at the temperature range of interest.
Relation: 17(4), pp.205–210
Appears in Collections:[Institute of Materials Engineering] Periodical Articles

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