Nanocrystallization kinetics of amorphous Fe{sub 81}B{sub 13.5}Si{sub 3.5}C{sub 2} magnetic ribbons
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400 (Thailand)
- Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400 (Thailand)
The kinetics of the nanocrystallization of amorphous Fe{sub 81}B{sub 13.5}Si{sub 3.5}C{sub 2} ribbon is studied. The changes in the microstructures and magnetic properties of ribbons annealed at 425 and 495 deg. C for 0.5-10 h were investigated using an X-ray diffractometer (XRD), Moessbauer spectroscopy (MS), differential scanning calorimeter (DSC) and vibrating sample magnetometer (VSM). The changes in the surface morphology were observed by a changed atomic force microscope (AFM). The XRD patterns and the Moessbauer spectrums show the formation of nanocrystallites of {alpha}-Fe(Si), Fe-B, Fe{sub 3}C and Fe{sub 3}Si of different grain sizes when annealed at different temperatures. The nanocrystallization kinetics of the Fe{sub 81}B{sub 13.5}Si{sub 3.5}C{sub 2} ribbon are described by an Avrami growth curve with an exponent values of 1.34 and 1.01 for the isothermal annealing at 425 and 495 deg. C, respectively. AFM topography pictures and surface image show that the density of the microstructure and the size of the grain increase as higher annealing temperatures are used.
- OSTI ID:
- 21068251
- Journal Information:
- Materials Research Bulletin, Vol. 43, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2007.04.023; PII: S0025-5408(07)00167-5; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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