| Effect of silicon on oxidation of Ni-15Al alloy |
| Y. Wu; Y. Niu; W. T. Wu
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| 2005
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| 发表期刊 | Transactions of Nonferrous Metals Society of China
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| ISSN | 1003-6326
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| 卷号 | 15期号:2页码:296-299 |
| 摘要 | The oxidation of binary Ni-Al alloy containing 15% (mole fraction, the same below if not mentioned) At (Ni-15Al), and of a ternary alloy with the same At content but also containing 4% Si (Ni-4Si-15Al) has been studied at 1 000 ° C under 1.0 X 10(5)Pa O-2 to examine the effect of the addition of Si on the oxidation of Ni-15Al, Oxidation of Ni-15Al produces a duplex scale composed of an outer NiO layer and an inner layer riched in Al2O3. On the contrary, Ni-4Si-15Al forms an external alumina layer directly in contact with the alloy presenting only trace of NiO and the Ni-Al spinet. As a result, the kinetics of Ni-15Al shows a fast initial stage followed by two subsequent parabolic stages with decreasing rate constants, while Ni-4Si-15Al presents essentially a single nearly-parabolic behavior with a rate constant similar to that of the final stage of Ni-15Al. Therefore, the addition of 4% Si significantly reduces the oxidation rate during the initial stage by preventing the formation of Ni-riched scales and promoting an earlier development of an exclusive external alumina layer on the alloy surface. |
| 部门归属 | chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;wu, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;ywu@imr.ac.cn
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| 关键词 | Ni-si-15al
Ternary Alloy
Oxidation
Al-si Alloys
Ni-cr Alloys
Internal Oxidation
Aluminum Alloys
External Scale
Ternary Alloys
Temperatures
Kinetics
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| URL | 查看原文
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| WOS记录号 | WOS:000228956700019
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/35143
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Y. Wu,Y. Niu,W. T. Wu. Effect of silicon on oxidation of Ni-15Al alloy[J]. Transactions of Nonferrous Metals Society of China,2005,15(2):296-299.
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| APA |
Y. Wu,Y. Niu,&W. T. Wu.(2005).Effect of silicon on oxidation of Ni-15Al alloy.Transactions of Nonferrous Metals Society of China,15(2),296-299.
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| MLA |
Y. Wu,et al."Effect of silicon on oxidation of Ni-15Al alloy".Transactions of Nonferrous Metals Society of China 15.2(2005):296-299.
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