| 外加Al2O3颗粒对Ti-Al-TiO2系合成产物微观结构的影响 |
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| 引用本文： | 艾桃桃.外加Al2O3颗粒对Ti-Al-TiO2系合成产物微观结构的影响[J].陕西理工学院学报(自然科学版),2008,24(1):1-4. |
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| 作者姓名： | 艾桃桃 |
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| 作者单位： | 陕西理工学院,材料学院,陕西,汉中,723003 |
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| 摘 要： | Ti-Al-TiO2体系外加不同含量的Al2O3颗粒获得了Al2O3/TiAl基复合材料,研究了产物的相组成及微观组织.结果表明:Al2O3颗粒多分布在基体晶界处.随外加Al2O3含量的增大,晶粒变小,但增强相颗粒团聚严重.外加Al2O3量存在一个临界值.含量过高,易造成结构疏松,不致密,形成大的气孔,且由于TiO2的活化作用,会造成外加的Al2O3颗粒烧结呈板状联结分布;含量较低,颗粒与界面的结合不够紧凑,但颗粒的结晶度较好.
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| 关 键 词： | Al2O3 TiAl 复合材料 微观结构 颗粒团聚 合成产物 微观结构 影响 system products microstructure dopant 结晶度 结合 界面 联结分布 烧结 活化作用 气孔 疏松 临界值 存在 严重 增强相 |
| 文章编号： | 1673-2944（2008）01-0001-04 |
| 收稿时间： | 2007-09-19 |
| 修稿时间： | 2007年9月19日 |
Effect of Al2O3 dopant on the microstructure of the products in Ti-Al-TiO2 system |
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| AI Tao-tao.Effect of Al2O3 dopant on the microstructure of the products in Ti-Al-TiO2 system[J].Journal of Shananxi University of Technology:Natural Science Edition,2008,24(1):1-4. |
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| Authors: | AI Tao-tao |
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| Abstract: | Al2O3 particles obtained TiAl -base composites prepared by pressure -assisted high -temperature reaction sintering of Ti - Al - TiO2 system with different contents of Al2O3 dopants. The phase composition and microstructure of the products were investigated. The results show Al2O3 particles distribution on the grain boundary. With the increase of Al2O3 dopant the grain size decreases and Al2O3 particles aggregate seriously. The content Al2O3 dopant has a critical value. If the content is overtop, the microstructure of the product is loose, un -compact and presents large pores, and the sintered Al2O3 dopant exhibits tabular structure due to the activate action of TiO2. If the content is lower, the connection between particles and interface is not compacted, but the crystallinity of the particles is fine. |
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| Keywords: | Al2O3 TiAl composite microstructure |
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