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| Relationship between Crystal Structure of Inclusions and Formation of Acicular Ferrites |
| Zhi-min CUI1,2,Li-guang ZHU1,3,Yuan-liang LI4,Qing-jun ZHANG2,Chun-liang YAN2,Wen-ling MO5 |
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. Analysis and Testing Center, North China University of Science and Technology, Tangshan 063009, Hebei, China
3. College of Metallurgy and Energy, North China University of Science and Technology,Tangshan 063009, Hebei, China
4. Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, Hebei, China
5. Yi Sheng College, North ChinaUniversity of Science and Technology, Tangshan 063009, Hebei, China |
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Abstract The formation mechanism of intragranular ferrites with acicular morphology was discussed. The ferrites were characterized by scanning electron microscopy. The results showed that the ferrites had an acicular structure with radial, symmetrical, and acicular laths, and that the inclusions were the nucleation sites of the intragranular acicular ferrites. Transmission electron microscopy (TEM) was used to characterize the inclusions. The results of TEM with energy dispersive spectroscopy and TEM-selected area electron diffraction indicated that the complex inclusions consisted of Ti-Al complex oxides and MnS. The jagged edges of the complex inclusions can be ascribed to the effects of the crystal structure. The stabilization energy U of the coordination polyhedron growth units varies with the type of connection according to the calculation results. A larger U corresponds to more stable growth units, which induces the preferentially oriented growth of inclusions, at which point acicular ferrites are formed.
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Received: 04 January 2016
Published: 12 June 2016
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| Fund:Hebei Provincial Natural Science Foundation of China;Research Science Institute on High-level personnel of colleges in Hebei province |
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Corresponding Authors:
Zhimin CUI
E-mail: lovesea0826@163.com
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2016, Vol. 23 
