Effect of Rare-Earth Elements on High-Temperature Oxidation Resistance of Fe–20Cr–5Al Alloy Foils
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- Ishii Kazuhide
- Technical Research Laboratories, Kawasaki Steel Corp.
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- Kohno Masaaki
- Technical Research Laboratories, Kawasaki Steel Corp.
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- Ishikawa Shin
- Technical Research Laboratories, Kawasaki Steel Corp.
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- Satoh Susumu
- Technical Research Laboratories, Kawasaki Steel Corp.
Bibliographic Information
- Other Title
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- Effect of Rare-Earth Elements on High-T
- Effect of Rare-Earth Elements on High-Temperature Oxidation Resistance of Fe–20Cr–5Al Alloy Foils
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Abstract
The oxidation behavior of 50 μm thick Fe-20 mass% Cr-5 mass% Al alloy foils containing small amounts of Y, La, Ce, Pr, Nd or Sm was examined by a cyclic oxidation test at 1373 and 1473 K in air. The addition of rare-earth elements decreased the growth rates of both the Al2O3 scale, which grew until Al in the foil had been depleted, and the Cr2O3 scale, which formed between the Al2O3 scale and the substrate after the depletion of Al. The segregation of the rare-earth elements to the Al2O3 grain boundaries was observed with a transmission electron microscope equipped with an energy-dispersive X-ray spectrometer. The reduction in the growth rate of the Cr2O3 scale indicates that the oxygen diffusion rate in the Al2O3 scale is reduced. Therefore, we infer that the segregation of rare-earth elements suppress oxygen diffusion via the Al2O3 grain boundaries, resulting in the decreased growth rate of the Al2O3 scale.
Journal
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- Materials Transactions, JIM
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Materials Transactions, JIM 38 (9), 787-792, 1997
The Japan Institute of Metals
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Details 詳細情報について
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- CRID
- 1390282679223962752
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- NII Article ID
- 130003556967
- 10002453683
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- NII Book ID
- AA10699969
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- COI
- 1:CAS:528:DyaK2sXntFKltbc%3D
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- ISSN
- 2432471X
- 09161821
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- NDL BIB ID
- 4317085
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed