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

W. Kai; I. F. Ren; R. F. Wang; P. C. Kao; C. T. Liu

doi:10.1016/j.intermet.2008.10.012

Author(s)

W. Kai
I. F. Ren
R. F. Wang
P. C. Kao
C. T. Liu

Detail(s)

Original language	English
Pages (from-to)	165-168
Journal / Publication	Intermetallics
Volume	17
Issue number	3
Publication status	Published - Mar 2009
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.intermet.2008.10.012 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-58649095914&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(995809c2-870c-4d64-8e86-508232526d16).html

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 (k_p 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.