Air oxidation of an Fe48Cr15C15MO 14B6Er2 bulk metallic glass at 600-725°C

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

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Author(s)

  • H. H. Hsieh
  • W. Kai
  • R. T. Huang
  • D. C. Qiao
  • P. K. Liaw

Detail(s)

Original languageEnglish
Pages (from-to)1864-1869
Journal / PublicationMaterials Transactions
Volume48
Issue number7
Publication statusPublished - Jul 2007
Externally publishedYes

Abstract

The oxidation behavior of an Fe48Cr15C 15Mo14B6Er2 bulk metallic glass (Fe-BMG) was studied over the temperature range of 600-725°C in dry air. The oxidation kinetics of the glassy alloy followed a two-stage parabolic rate law at T ≤ 650°C, while the single-stage linear rate was observed at higher temperatures (T ≥ 675°C). The oxidation rates of the Fe-BMG at T ≤ 625°C were much lower than those of the commercial 304 stainless steel (304 SS), revealing the excellent oxidation resistance of the amorphous alloy. A continuous, thin layer of chromium oxide (Cr2O3) containing some iron was formed at T ≤ 650°C, while typical hump iron oxides intermixed with minor amounts of Cr2O3 and MoO 2 were observed at T ≥ 675°C. In addition, a substrate phase transformation from the amorphous structure to Fe-Cr and FeCrMo crystalline phases was detected after the oxidation. Very likely, the formation of the non-protective Fe3O4 and MoO2 breaks the scale integrity and allows the rapid cation/anion transportation, resulting in the fast linear-kinetics behavior of the Fe-BMG at T ≥ 675°C. © 2007 The Japan Institute of Metals.

Research Area(s)

  • Fe48Cr15C15Mo14B 6Er2 alloy, Metal glass, Oxidation

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Air oxidation of an Fe48Cr15C15MO 14B6Er2 bulk metallic glass at 600-725°C. / Hsieh, H. H.; Kai, W.; Huang, R. T.; Qiao, D. C.; Liaw, P. K.

In: Materials Transactions, Vol. 48, No. 7, 07.2007, p. 1864-1869.

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