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《Journal of Huazhong University of Science and Technology(Nature Science Edition)》 2006-01
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Study on microstructure characterization of carbonyl Fe_xNi_(100-x) fibers and its growth mechanism by magnetic-field-induced chemical decomposition

Li Xiangcheng Gong Rongzhou Zhao Zhensheng Doctoral Candidate;Dept.of Electronic Sci.& Tech.,Huazhong Univ.of Sci.& Tech.,Wuhan 430074,China.  
Using Fe(CO)_5 and Ni(CO)_4 as raw materials,carbonyl Fe_xNi_(100-x) fibers were prepared by magnetic-field-induced chemical decomposition.The microstructure of carbonyl Fe_xNi_(100-x) fibers and its morphology at the different ratio of Fe(CO)_5 to Ni(CO)_4 were studied.It showed that carbonyl Fe_xNi_(100-x) fibers with different chemical composition presented different structure(bcc or fcc).Carbon element in fibers existed in different forms.The corresponding morphologies of fibers took on the shape of straight-type,Y-type and zigzag-type.The reason was caused by the interference between the interfaces of crystal growth.By controlling the crystal growth factors such as decomposition temperature and magnetic field strength etc.,the morphology of carbonyl Fe_xNi_(100-x) fibers and its diameter were changed.
【CateGory Index】: TQ340.1
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