| Al2O3/(纳米)Fe3Al复合材料位错形貌的TEM观测 |
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| 引用本文： | 尹衍升,龚红宇,谭训彦,甄玉花,张银燕,陈云.Al2O3/(纳米)Fe3Al复合材料位错形貌的TEM观测[J].复合材料学报,2004,21(2):153-156. |
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| 作者姓名： | 尹衍升 龚红宇 谭训彦 甄玉花 张银燕 陈云 |
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| 作者单位： | 1.中国海洋大学 材料科学研究院, 青岛 266003; |
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| 基金项目： | 国家自然科学基金,高等学校博士学科点专项科研项目,50242008,20020422001,, |
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| 摘 要： | 利用TEM对Fe3Al/Al2O3复合材料的位错形貌进行了观测分析,观察到Fe3Al/Al2O3中丰富的位错组态。根据透射电镜观察,引入Fe3Al后,Al2O3晶内产生大量位错,位错多产生于Fe3Al于Al2O3相界面附近,亚界面的形成使基体晶粒再细化,使强度提高。在Fe3Al中观察到超点阵位错,对材料起到"有序强化"作用。
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| 关 键 词： | 位错 Fe3Al/Al2O3 复合材料 |
| 文章编号： | 1000-3851(2004)02-0153-04 |
| 收稿时间： | 2002-12-30 |
| 修稿时间： | 2003-03-27 |
TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al2O3 / (NANO)Fe3Al COMPOSITE |
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| YIN Yansheng,GONG Hongyu,TAN Xunyan,ZHEN Yuhua,ZHANG Yinyan,CHEN Yun.TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al2O3 / (NANO)Fe3Al COMPOSITE[J].Acta Materiae Compositae Sinica,2004,21(2):153-156. |
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| Authors: | YIN Yansheng GONG Hongyu TAN Xunyan ZHEN Yuhua ZHANG Yinyan CHEN Yun |
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| Affiliation: | 1.Department of Materials, Ocean University of China, Qingdao 266003, China;2.Key Laboratory for Liquid Structure and Hereditry of Ministry of Education, Shandong University, Engineering Ceramics Key Laboratory of Shandong Province, Jinan 250061,China |
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| Abstract: | Extensive dislocation structure was observed by TEM in the Fe_3Al/Al_2O_3 nanocomposite. The composites were thus strengthened due to microstructure refinement through subgrain formation. The ordered strengthening mechanism of Fe_3Al intermetallic further increased the mechanical properties of Fe_3Al/Al_2O_3 composites. It was seen from TEM that lots of dislocations were produced in Al_2O_3 intergrains by introducing Fe_3Al. The dislocations mainly existed near the interphase of Fe_3Al and Al_2O. TEM shows Fe_3Al can breed rich dislocations in Al_2O_3, which were nailed by nano grains. The composites were strengthened due to microstructure refinement through subgrain formation. Superlattice dislocations observed in Fe_3Al can produce orderly strengthening. |
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| Keywords: | dislocation Fe_3Al/Al_2O_3 composite |
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