Criteria for the formation of protective Al2O3 scales on Fe-Al and Fe-Cr-Al alloys
文献类型：期刊论文
| 作者 | Z. G. Zhang ; F. Gesmundo ; P. Y. Hou ; Y. Niu |
| 刊名 | Corrosion Science
 |
| 出版日期 | 2006 |
| 卷号 | 48期号:3页码:741-765 |
| 关键词 | FeCrAl ternary alloys oxidation Cr effect iron-aluminum-alloys high-temperature oxidation high oxidant pressures y alloys internal oxidation growth mechanisms external oxidation self-diffusion base alloys gamma-iron |
| ISSN号 | 0010-938X |
| 中文摘要 | The conditions for the formation of external alumina scales on binary Fe-Al alloys and the nature of the third-element effect due to chromium additions have been investigated by studying the oxidation at 1000 degrees C in 1 atm O-2 of a binary Fe-10 at.% Al alloy (Fe-10Al) and of two ternary Fe-Cr-10 at.% Al alloys containing 5 and 10 at.% chromium (Fe-5Cr-10Al and Fe-10Cr-10Al, respectively). An Al-rich scale developed initially on Fe-10Al was subsequently replaced by a multi-layered scale containing mixtures of Fe and Al oxides plus a large number of Fe-rich oxide nodules: internal aluminum oxidation was essentially absent from this alloy. Addition of 5 at.% chromium to Fe-10Al did not suppress the formation or nodules, but they were eventually healed by the growth of all alumina layer at their base, resulting in a significant reduction of the oxidation rate. Finally, the alloy with 10 at.% Cr formed continuous external alumina scales without any Fe-rich nodule. Thus, the addition of sufficient amounts of chromium to Fe-10Al produces a third-element effect as expected. However, the process found in this alloy system does not involve a prevention of the internal oxidation of Al. Instead, it shows a transition from the growth of mixed Fe- and Al-rich external scales directly to all external Al2O3 scale formation. An interpretation of this kind of mechanism involving a third-element is presented along with a prediction of the critical Al contents required to produce the various possible scaling modes on binary Fe-Al alloys. (C) 2005 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-05-18 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/40047]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. G. Zhang,F. Gesmundo,P. Y. Hou,et al. Criteria for the formation of protective Al2O3 scales on Fe-Al and Fe-Cr-Al alloys[J]. Corrosion Science,2006,48(3):741-765. |
| APA | Z. G. Zhang,F. Gesmundo,P. Y. Hou,&Y. Niu.(2006).Criteria for the formation of protective Al2O3 scales on Fe-Al and Fe-Cr-Al alloys.Corrosion Science,48(3),741-765. |
| MLA | Z. G. Zhang,et al."Criteria for the formation of protective Al2O3 scales on Fe-Al and Fe-Cr-Al alloys".Corrosion Science 48.3(2006):741-765. |
入库方式： OAI收割
来源：金属研究所
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