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Jamili-Shirvan, Zahra, H. Sabzevar, Mohsen. (1392). Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons. , 46(1), 55-59. doi: 10.7508/jufgnsm.2013.01.008
Zahra Jamili-Shirvan; Mohsen H. Sabzevar. "Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons". , 46, 1, 1392, 55-59. doi: 10.7508/jufgnsm.2013.01.008
Jamili-Shirvan, Zahra, H. Sabzevar, Mohsen. (1392). 'Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons', , 46(1), pp. 55-59. doi: 10.7508/jufgnsm.2013.01.008
Jamili-Shirvan, Zahra, H. Sabzevar, Mohsen. Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons. , 1392; 46(1): 55-59. doi: 10.7508/jufgnsm.2013.01.008

Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons

Journal of Ultrafine Grained and Nanostructured Materials
مقاله 8، دوره 46، شماره 1، اسفند 2013، صفحه 55-59    اصل مقاله (387.02 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.7508/jufgnsm.2013.01.008
نویسندگان
Zahra Jamili-Shirvan1؛ Mohsen H. Sabzevar2
1PhD Candidate in Material Engineering Dept of Materials Engineering and Metallurgy, Faculty of Engineering, Ferdowsi University of Mashhad.
2Department of Materials Engineering and Metallurgy, Faculty of Engineering, Ferdowsi University of Mashhad, Iran.
چکیده
The nanocrystallization of Co67Fe4Cr7Si8B14 amorphous ribbons which prepared by planar flow melt spinning process (PFMS) was investigated. Crystallization of the ribbons was studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The DTA result of amorphous ribbon at heating rate of 10˚C/min showedoccurrence of phase transitions in two stages. The ribbons were isothermally annealed for 30 minutes in argon atmosphere at different temperatures between 300 and 650ºC with 25ºC steps. The magnetic properties of annealed samples were measured using a vibrating sample magnetometer (VSM). The VSM results revealed that optimum soft magnetic properties occurred at 400ºC. XRD patterns showed that the samples isothermally annealed up to 450ºC were amorphous, while TEM results at 400ºC indicated 7-8 nm mean size nanocrytallites in amorphous matrix and size of the nanocrystallites increased by increasing temperature. Also by X-ray diffraction pattern, precipitation of different phases at higher temperatures confirmed. 
کلیدواژه‌ها
Amorphous Alloy؛ Transmission Electron Microscopy؛ Nanocrystallization, Soft Magnetic Properties؛ XRD
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