| Cu—Al合金内氧化工艺及动力的研究 |
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| 引用本文： | 申玉田,崔春翔,吴人洁,徐艳姬,孟凡斌.Cu—Al合金内氧化工艺及动力的研究[J].稀有金属材料与工程,2001,30(1):44-49. |
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| 作者姓名： | 申玉田 崔春翔 吴人洁 徐艳姬 孟凡斌 |
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| 作者单位： | 1. 河北工业大学
2. 上海交通大学 |
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| 基金项目： | 国家重点自然科学基金(2961080)和河北省教委博士基金资助项目 |
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| 摘 要： | 对 Cu- Al合金的内氧化工艺及其动力学进行了系统研究。结果表明 :本实验条件下以 12 2 3K,0 .5 h内氧化工艺所得材料的性能最佳 ,其显微组织特征是 Cu基体上均匀弥散分布着纳米级 γ- Al2 O3粒子。理想条件的内氧化初期和实际条件下的内氧化动力学曲线服从抛物线规律。温度、时间、Cu- Al合金粉颗粒半径和 Al浓度是实际内氧化控制的 4要素 ,它们间的函数关系近似满足下式 :t=6 .79R2 CBexp(2 32 5 1/T)。实际内氧化时间不宜过长 ,内氧化温度应该 :112 3K
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| 关 键 词： | Cu－Al合金 内氧化 动力学 电导率 复合材料 氧化铝 |
| 文章编号： | 1002-185X(2001)01-0044-06 |
| 修稿时间： | 2000年1月30日 |
Internal Oxidation Technology and Kinetics of the Alloy Cu-Al |
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| Shen Yutian,Cui Chunxiang,Wu Renjie,Xu Yanji,Meng Fanbin.Internal Oxidation Technology and Kinetics of the Alloy Cu-Al[J].Rare Metal Materials and Engineering,2001,30(1):44-49. |
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| Authors: | Shen Yutian Cui Chunxiang Wu Renjie Xu Yanji Meng Fanbin |
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| Abstract: | The internal oxidation technology and kinetics of the alloy Cu-Alhave been systematically studied. The results show that optimum pro perties can be obtained for the materials oxidized internally at 1 223K for 0.5 h. Its microstructure is characterized by an uniform distribution of γ-Al2O3 nano-particles in the Cu grains. The kinetic curves of internal oxidation in the initial stage of ideal condition and under practical condition obey parabolic law. Four key factors of practical internal oxidation are temperature, time, particle radius of the alloy Cu-Al and concentration of aluminum, and their functional relation can be approximately described by the following equation: t= 6.79R2CBexp(23 251/T). The practical internal oxidation time should not be quite long, and temperature should be in the range 1 123K＜T≤1 223K. |
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| Keywords: | internal oxidation kinetics electric conductivity hardness diffusion |
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