TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al2O3 / (NANO)Fe3Al COMPOSITE

YIN Yansheng; GONG Hongyu; TAN Xunyan; ZHEN Yuhua; ZHANG Yinyan; CHEN Yun

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Article Navigation > Acta Materiae Compositae Sinica > 2004 > 21(2): 153-156

YIN Yansheng, GONG Hongyu, TAN Xunyan, et al. TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al2O3 / (NANO)Fe3Al COMPOSITE[J]. Acta Materiae Compositae Sinica, 2004, 21(2): 153-156.

Citation:

YIN Yansheng, GONG Hongyu, TAN Xunyan, et al. TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al₂O₃ / (NANO)Fe₃Al COMPOSITE[J]. Acta Materiae Compositae Sinica, 2004, 21(2): 153-156.

YIN Yansheng, GONG Hongyu, TAN Xunyan, et al. TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al2O3 / (NANO)Fe3Al COMPOSITE[J]. Acta Materiae Compositae Sinica, 2004, 21(2): 153-156.

Citation:

YIN Yansheng, GONG Hongyu, TAN Xunyan, et al. 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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TEM OBSERVATION ON THE DISLOCATION MORPHOLOGY OF Al₂O₃ / (NANO)Fe₃Al COMPOSITE

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

Received Date: 2002-12-30
Rev Recd Date: 2003-03-27
Publish Date: 2004-04-15

Abstract

Abstract

Extensive dislocation structure was observed by TEM in the Fe₃Al/Al₂O₃ nanocomposite. The composites were thus strengthened due to microstructure refinement through subgrain formation. The ordered strengthening mechanism of Fe₃Al intermetallic further increased the mechanical properties of Fe₃Al/Al₂O₃ composites. It was seen from TEM that lots of dislocations were produced in Al₂O₃ intergrains by introducing Fe₃Al. The dislocations mainly existed near the interphase of Fe₃Al and Al₂O. TEM shows Fe₃Al can breed rich dislocations in Al₂O₃, which were nailed by nano grains. The composites were strengthened due to microstructure refinement through subgrain formation. Superlattice dislocations observed in Fe₃Al can produce orderly strengthening.
- dislocation,
- Fe₃Al/Al₂O₃,
- composite
Long Abstrsct
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