| 原位还原法制备Al/Al2O3复合材料的力学性质及反应动力学 |
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| 引用本文： | 李光强,张林楠,彭其春,都兴红,隋智通.原位还原法制备Al/Al2O3复合材料的力学性质及反应动力学[J].材料与冶金学报,2003,2(3):193-199. |
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| 作者姓名： | 李光强 张林楠 彭其春 都兴红 隋智通 |
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| 作者单位： | 1. 武汉科技大学,材料与冶金学院,湖北,武汉,430081
2. 东北大学,材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 湖北省自然科学基金杰出青年人才资助项目(2003ABB009) |
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| 摘 要： | 以石英为先驱体,以液态铝为还原剂,在1073～1523 K的温度范围内对原位生成铝/氧化铝复合材料进行了研究,对获得的复合材料的物理和机械性能做了测定,并对材料显微结构进行了观测和分析.在1473K制备的铝/氧化铝复合材料密度为2.95g/cm3,最大弹性模量为130 GPa,最大三点抗弯强度为580 MPa,最大拉伸强度为268 MPa,洛氏硬度为86.产物铝/氧化铝复合材料的形状与作为先驱体的二氧化硅的形状几乎一致.讨论了反应过程的动力学.
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| 关 键 词： | 铝/氧化铝 原位生成复合材料 置换反应 动力学 |
| 文章编号： | 1671-6620(2003)03-0193-06 |
| 修稿时间： | 2003年7月4日 |
Mechanical properties of in-situ prepared Al/Al2O3 composite and the reaction kinetics |
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| LI Guang-qiang,ZHANG Lin-nan,PENG Qi-chun,DU Xing-hong,SUI Zhi-tong.Mechanical properties of in-situ prepared Al/Al2O3 composite and the reaction kinetics[J].Journal of Materials and Metallurgy,2003,2(3):193-199. |
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| Authors: | LI Guang-qiang ZHANG Lin-nan PENG Qi-chun DU Xing-hong SUI Zhi-tong |
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| Abstract: | This work studied the process for preparing A1/A12O3 composite by using liquid Al replacing Si from silica precursor. The experimental temperature was in the range of 1073 - 1523K. The physical and mechanical properties of the obtained composite bodies were determined. The microstructure and the possibilities for improving the mechanical properties of the A1/A12O3 composite were also explored. The Maximum values of Young's modulus, the three-point-bending strength and the breaking strength of the A1/A12O3 composite obtained at 1 473 K are 130 GPa, 580MPa and 268 MPa respectively. The values of density and Rockwell hardness are 2. 95g/cm3 and 86 respectively. The Si in silica precursor was substituted completely and the shape of obtained Al/Al2O3 composite was almost the same as the precursor. The kinetics of substitution reaction was discussed too. |
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| Keywords: | Al/Al2O3 in-situ composite substitution reaction kinetics |
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