The oxidation of Fe-2 and 5 at.% Y alloys at 600--800 C in air

Journal Article · Tue Jun 01 04:00:00 EDT 1999 · Oxidation of Metals

DOI:https://doi.org/10.1023/A:1018843327998· OSTI ID:351490

Zeng, C L ^[1]; Rizzo, F C; Monteiro, M J ^[2]; Wu, W T ^[1]

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1. Chinese Academy of Sciences, Shenyang (China). State Key Lab. for Corrosion and Protection
2. Pontificia Univ. Catolica do Rio de Janeiro (Brazil). Dept. de Ciencia dos Materiais e Metalurgia

The oxidation of Fe-Y alloys containing 2 and 5 at.% Y and pure iron has been studied at 600--800 C in air. The oxidation of pure iron follows the parabolic rate law at all temperatures. The oxidation of Fe-Y alloys at 600 C approximately follows the parabolic rate law, but not at 700 and 800 C, where the oxidation goes through several stages with quite different rates. The oxide scales on Fe-2Y and Fe-5Y at 700 and 800 C are composed of external pure Fe oxides containing Fe{sub 2}O{sub 3}, Fe{sub 3}O{sub 4}, and FeO, with FeO being the main oxide and an inner mixture of FeO and YFeO{sub 3}. The scales on Fe-2Y and Fe-5Y at 600 C consist of Fe{sub 2}O{sub 3}, Fe{sub 3}O{sub 4}, and Y{sub 2}O{sub 3}, with a minor amount of FeO. Significant internal oxidation in both Fe-Y alloys occurred at all temperatures. The Y-containing oxides follow the distribution of the original intermetallic compound phase in the alloys. The effects of Y on the oxidation of pure Fe are discussed.

• OSTI ID: 351490
• Journal Information: Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 5-6 Vol. 51; ISSN OXMEAF; ISSN 0030-770X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
INTERMETALLIC COMPOUNDS
IRON ALLOYS
KINETICS
OXIDATION
SCALING
TEMPERATURE DEPENDENCE
YTTRIUM ALLOYS