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1223K，0.5h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-Al2O3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=6.79R2CBexp(23251/T)。实际内氧化时间不宜过长，内氧化温度应该：1123K＜T≤1223K。
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.
参考文献
| [1] | Broyles S E et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1996,27A(05):1217. |
| [2] | Joanna G .[J].Journal of Materials Engineering and Performance,1992,1(01):113. |
| [3] | Sun H B;Wheat H G .[J].Journal of Materials Science,1993,28:5435. |
| [4] | 申玉田 et al.[J].金属学报,1999,35(08):888. |
| [5] | 李玉桐 et al.[J].复合材料学报,1996,13(02):42. |
| [6] | 石子源 et al.[J].金属热处理学报,1997,18(04):32. |
| [7] | 田素贵 et al.[J].粉末冶金技术,1995,13(04):289. |
| [8] | 赵祖德.铜 及铜合金材料手册[M].北京:科学出版社,1993:155. |
| [9] | 谢文果 .[J].粉末冶金技术,1996,14(02):136. |
| [10] | 浙江大学普通化学教研组.普通化学[M].北京:高等教育出版社,1992:584. |
| [11] | Pastored R L;Rapp R A .[J].Transactions of the Metallurgical Society of AIME,1969,245:1711. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%