The Effect of Y<SUB>2</SUB>O<SUB>3</SUB> Dispersion on the High Temperature Oxidation of Fe–20Cr Alloys
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- Nagai Hiroshi
- Department of Materials Science and Engineering, Faculty of Engineering, Osaka University
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- Takebayashi Yoshiki
- Graduate School, Osaka University
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- Fujikawa Takeshi
- Graduate School, Osaka University
書誌事項
- タイトル別名
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- The Effect of Y<SUB>2</SUB>O<SUB>3</SUB> Dispersion on the High Temperature Oxidation of Fe–20Cr Alloys
抄録
The isothermal oxidation behavior of Fe–20Cr alloys with zero, 0.2, 0.4, 0.7, 1.0, 1.4 and 2.0 mass% of Y2O3 was investigated in air at 1273, 1323, 1373, 1423, and 1473 K . Addition of 0.7% or more Y2O3 significantly improved the oxidation resistance of Fe–20Cr alloys, especially at the higher temperatures. It was found that there was a minimum mass gain in the Fe–20Cr–0.7Y2O3 alloy, and this had good reproducibility. IMA showed that the composition of the Cr2O3 scale formed during the early stage of oxidation was apparently dependent on the Y2O3 content in the alloy. The Y2O3 content in the scale increased with increasing Y2O3 content in the alloys. The Fe2O3 content was the lowest in the alloy with 0.2%Y2O3, over which it increased again. The Y2O3 content in the alloy having the lowest Fe2O3 content in the scale did not agree with that showing the minimum mass gain. The grain size of the alloys decreased with increasing Y2O3 content. To explain the results obtained it is necessary to consider not only changes in the grain size of the alloys and lowering of the oxygen dissociation pressure of the scale due to addition of Y2O3 but also changes in the defect structure of the scale.
収録刊行物
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- Transactions of the Japan Institute of Metals
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Transactions of the Japan Institute of Metals 22 (9), 589-596, 1981
社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282680094632576
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- NII論文ID
- 130003485929
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- COI
- 1:CAS:528:DyaL38Xht1OgsLg%3D
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- ISSN
- 24324701
- 00214434
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可