The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 650 °C in various oxygen-containing environments

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

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Detail(s)

Original languageEnglish
Pages (from-to)165-168
Journal / PublicationIntermetallics
Volume17
Issue number3
Publication statusPublished - Mar 2009
Externally publishedYes

Abstract

The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass (Fe7-BMG) was investigated in three oxygen-containing atmospheres over the oxygen partial pressure range of 103-105 Pa at 650 °C. The oxidation kinetics of the Fe7-BMG followed the parabolic rate law in all cases, indicating that solid-state diffusion is the rate-controlling step during oxidation. The oxidation rate constants (kp values) increased with increasing oxygen partial pressure, implying a typical scaling behavior with a p-type semiconductivity. Duplex scales formed on the Fe7-BMG consisted of an outer layer of mostly iron oxides (Fe2O3/Fe3O4) and minor amounts of B2O3, and a heterophasic inner layer of mostly tetragonal-ZrO2 (t-ZrO2) intermixed with non-oxidized intermetallic phases. © 2008.

Research Area(s)

  • B. Glasses, metallic, B. Oxidation