The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 550-700 °C

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)205-210
Journal / PublicationIntermetallics
Volume17
Issue number4
Publication statusPublished - Apr 2009
Externally publishedYes

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. © 2008.

Research Area(s)

  • B. Glasses, metallic, B. Oxidation

Citation Format(s)

The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 550-700 °C. / Kai, Wu; Ren, I. F.; Kao, P. C.; Huang, R. T.; Liu, C. T.

In: Intermetallics, Vol. 17, No. 4, 04.2009, p. 205-210.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review