| 晶粒尺寸对Cu-60Ni合金高温氧化行为的影响 |
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| 引用本文： | 曹中秋,牛焱,吴维山文,王崇琳.晶粒尺寸对Cu-60Ni合金高温氧化行为的影响[J].腐蚀科学与防护技术,2001,13(2):63-65. |
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| 作者姓名： | 曹中秋 牛焱 吴维山文 王崇琳 |
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| 作者单位： | 1. 中国科学院金属研究所;辽宁大学化学科学与工程学院
2. 中国科学院金属研究所 |
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| 基金项目： | 国家自然科学基金! 5 98710 5 0，国家杰出青年基金! 5 972 5 10 1 |
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| 摘 要： | 研究了铸态Cu-60at%Ni(CACu-60Ni)和机械合金化制 备的纳米晶Cu-60at%Ni(MACu-60Ni)合金在800℃空气中的氧化行为.结果表明：CACu-60Ni 合金的氧化动力学偏离抛物线规律，形成外层为CuO，内层为疏松、多孔的Cu2O和NiO混合 氧化物层，同时沿合金基体发生了Ni的内氧化；MACu-60Ni合金的氧化动力学近似遵循抛物 线规律，合金表面氧化膜外层为很薄一层CuO，内层为较厚，且均匀致密的NiO层.晶粒细化 明显促进了由Cu2O和NiO混合氧化膜向单一连续NiO膜的转变.讨论了合金的氧化机制.
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| 关 键 词： | Cu-Ni合金 晶粒尺寸 高温氧化 |
| 文章编号： | 1002-6495(2001)02-0063-03 |
| 修稿时间： | 2000年8月3日 |
EFFECT OF GRAIN SIZE ON HIGH TEMPERATURE OXIDATION BEHAVIOR OF Cu-60Ni ALLOYS |
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| CAO Zhongqiu ,NIU Yan ,WU Weitao ,WANG Conglin.EFFECT OF GRAIN SIZE ON HIGH TEMPERATURE OXIDATION BEHAVIOR OF Cu-60Ni ALLOYS[J].Corrosion Science and Protection Technology,2001,13(2):63-65. |
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| Authors: | CAO Zhongqiu NIU Yan WU Weitao WANG Conglin |
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| Affiliation: | CAO Zhongqiu 1,2,NIU Yan 1,WU Weitao 1,WANG Conglin 1 |
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| Abstract: | The oxidation behavior of cast and nanocrystalline Cu - 60Nialloys prepared respectively by arc-melting and hot pressing a mechanically alloyed powder moxtine techniques has been studied at 800℃ in air. The oxidation of the cast alloy deviates from the parabolic rate law, forming a two - lay-ered scale composed of an external scale of CuO and a porous inner scale of Cu2O and NiO. The internal oxidation of nickel was observed in the alloy. The oxidation of the nanocrystalline alloy follows approximately parabolic rate law , with formation of a thin external layer of CuO and a thick compact inner layer of NiO. The reduction in the alloy grain size promotes obviously the transition from a mixed scale of Cu2O and NiO to a continuous scale of NiO. The oxidation mechanism of the alloys was discussed. |
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| Keywords: | Cu-Ni alloy grain size high temperature oxidation |
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