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| XD合成Al2O3,TiB2／Al复合材料的热力学分析 | |
| 引用本文： | 朱和国,吴申庆,王恒志.XD合成Al2O3,TiB2／Al复合材料的热力学分析[J].中国有色金属学报,2001,11(3):382-385. |
| 作者姓名： | 朱和国 吴申庆 王恒志 |
| 作者单位： | 1. 东南大学材料科学与工程系;南京理工大学材料科学与工程系 2. 东南大学材料科学与工程系, 3. 南京理工大学材料科学与工程系, |
| 摘 要： | 从热力学的角度讨论了原位反应生成Al2O3和TiB2陶瓷粒子增强铝基复合材料的合成机理。结果表明，在Al-TiO2-B体系中，以一定的加热速率加热至1073K左右时，Al与TiO2之间首先发生铝热反应，反应产生出活性钛原子并形成Al-Ti-B反应；AlB2和Al3Ti均系反应中间产物，Alb2在1200K左右时分解为Al和B2Al3Ti被B还原，当B的加入量（摩尔）是TiO2的两部左右时，Al3Ti基本消失，最终生成Al2O3和TiB2陶瓷颗粒增强的铝基复合材料。 |
| 关 键 词： | 原位反应 陶瓷粒子 热力学 铝基复合材料 |
| 文章编号： | 1004-0609(2001)03-0382-04 |
| 修稿时间： | 2000年10月15 |
Thermodynamics analysis of Al2O3, TiB2 /Al composites fabricated by exothermic dispersion method |
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| ZHU He-guo.Thermodynamics analysis of Al2O3, TiB2 /Al composites fabricated by exothermic dispersion method[J].The Chinese Journal of Nonferrous Metals,2001,11(3):382-385. | |
| Authors: | ZHU He-guo |
| Abstract: | The thermodynamics of in-situ reaction from the reaction system of Al-TiO2-B to form Al2O3, TiB2/Al composites was studied. The results show that under the condition of certain heating rate, aluminum reacts with TiO2 firstly at 1?073?K and then forms Al-Ti-B reaction system. The phases of AlB2 and Al3Ti occur during the reaction process as medi-products and the AlB2 phase is decomposed into Al and B at the temperature of about 1?200?K, meanwhile, Al3Ti is deduced by B to form TiB2. When the mole ratio of B/TiO2 is about two, the Al3Ti phase is almost eliminated completely. |
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