Microstructural effects on the high temperature oxidation of two-phase Cu-Cr alloys in 1 atm O-2
文献类型：期刊论文
| 作者 | G. Y. Fu ; Y. Niu ; F. Gesmundo |
| 刊名 | Corrosion Science
 |
| 出版日期 | 2003 |
| 卷号 | 45期号:3页码:559-574 |
| 关键词 | oxidation Cu-Cr alloys powder metallurgy mechanical alloying niagnetron sputtering 2-phase binary-alloys most-reactive component possible scaling modes low oxidant pressures air oxidation ag alloys selective oxidation internal oxidation h-2-h2s mixtures stainless-steel |
| ISSN号 | 0010-938X |
| 中文摘要 | The oxidation of a Cu-Cr alloy containing about 60 wt% Cr and of two Cu-Cr alloys containing about 40 wt% Cr was studied at 700 and 800 degreesC in I atm. O-2. The 60 wt% Cr alloy was prepared by powder metallurgy (PM) and had a phase particle size of 50-150 mum. One of the two alloys containing about 40 wt% Cr was prepared by mechanical alloying (MA) and had a phase grain size ranging from 10-50 nm to 200-300 nm, depending on the location, while the other was prepared by magnetron sputtering (MS) and had a phase grain size around 5-10 nm. The most important difference between the oxidation behavior of the three alloys is the formation of an exclusive chromia scale on the surface of the Cu-40 wt% Cr alloy prepared by magnetron sputtering and of a continuous chromia layer beneath an outermost layer of copper oxides on the corresponding alloy prepared by mechanical alloying, while the Cu-60 wt% Cr alloy prepared by powder metallurgy formed complex scales composed mostly of CuO, Cu2O with Some Cu2Cr2O4 and Cr2O3. Thus, the microstructure of two-phase binary alloys has a strong effect of their oxidation behavior. In particular, a decrease of the alloy grain size favors the exclusive external oxidation of the most reactive component, reducing the corresponding critical content in the alloy. This effect is attributed to the presence of larger concentrations of rapid diffusion paths for the migration of the components in the alloy as well as to a faster dissolution of the particles of the Cr-rich phase in the copper matrix. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35830]  |
| 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 | G. Y. Fu,Y. Niu,F. Gesmundo. Microstructural effects on the high temperature oxidation of two-phase Cu-Cr alloys in 1 atm O-2[J]. Corrosion Science,2003,45(3):559-574. |
| APA | G. Y. Fu,Y. Niu,&F. Gesmundo.(2003).Microstructural effects on the high temperature oxidation of two-phase Cu-Cr alloys in 1 atm O-2.Corrosion Science,45(3),559-574. |
| MLA | G. Y. Fu,et al."Microstructural effects on the high temperature oxidation of two-phase Cu-Cr alloys in 1 atm O-2".Corrosion Science 45.3(2003):559-574. |
入库方式： OAI收割
来源：金属研究所
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