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| Al-TiO2系XD合成的动力学分析 | |
| 引用本文： | 朱和国,吴申庆,王恒志,吴锵,卫中山.Al-TiO2系XD合成的动力学分析[J].复合材料学报,2002,19(1):28-31. |
| 作者姓名： | 朱和国 吴申庆 王恒志 吴锵 卫中山 |
| 作者单位： | 1. 东南大学,材料科学与工程系,南京,210096南京理工大学,材料科学与工程系,南京,210094 2. 东南大学,材料科学与工程系,南京,210096 3. 南京理工大学,材料科学与工程系,南京,210094 |
| 基金项目： | 江苏省自然科学基金，BK20000003， |
| 摘 要： | 通过XD(Exothermic Dispersion)法原位反应生成Al2O3与Al3Ti增强的铝基复合材料,对反应过程动力学机理进行了探讨。结果表明Al/TiO2经充分混合、挤压成坯后,在真空炉中以一定的升温速率加热至800℃左右时发生剧烈的化学反应。SEM、XRD及能谱分析可知:生成物Al2O3呈等轴颗粒状,Al3Ti呈棒状,并进一步说明了升温速率、铝含量、压坯的预紧实度等因素对反应结果的影响。 |
| 关 键 词： | 原位化学反应 动力学 燃烧波 铝基复合材料 |
| 文章编号： | 1000-3851(2002)01-0028-04 |
| 收稿时间： | 2000-05-15 |
| 修稿时间： | 2000年5月15日 |
KINETIC ANALYSIS ON Al-TiO2 SYSTEM BY XD SYNTHESIS TECHNOLOGY |
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| ZHU He-guo,WU Shen-qing,WANG Hen-zhi,WU Qiang,WEI Zhong-shan.KINETIC ANALYSIS ON Al-TiO2 SYSTEM BY XD SYNTHESIS TECHNOLOGY[J].Acta Materiae Compositae Sinica,2002,19(1):28-31. | |
| Authors: | ZHU He-guo WU Shen-qing WANG Hen-zhi WU Qiang WEI Zhong-shan |
| Affiliation: | 1. Department of Materials Science and Engineering, South East University, Nanjing 210096,China; 2. Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094,China |
| Abstract: | Al2 O3,Al3Ti/Al in situ aluminum matrix composite material was prepared by means of XD( exothermic dispersion) synthesis technique.Itskinetic mechanism was also discussed.The results showed that the Al- Ti O2 system can reactin a very shorttime.The reaction was propagated in com- bustion wave.It wasalso shown thataluminum initially reacted with Ti O2 to form Al2 O3and reduced Ti.The Al2 O3and Al3Titook the shape ofequalaxialparticle and block respectively.A certain heat- ing rate and content of aluminum are needed,if thermal explosion occurs commonly in the Al- Ti O2 system. The bulk shrinkage will be higher with lower heating rate,higher aluminum content and lower green density. |
| Keywords: | in situ chemical reaction kinetics combustion wave aluminum matrix composites |
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