Structural and Mössbauer studies on mechanical milled SmCo5/α-Fe nanocomposite magnetic powders |
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Authors: | P. Saravanan M. Manivel Raja R. Gopalan N.V. Rama Rao K. Suresh D.V. Sridhara Rao V. Chandrasekaran |
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Affiliation: | aDefence Metallurgical Research Laboratory, Kanchanbagh P.O., Hyderabad 500 058, India |
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Abstract: | The SmCo5/α-Fe nanocomposite powders were prepared by high energy ball milling and the inter-diffusion reaction between the SmCo5 and α-Fe magnetic phases were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and 57Fe Mössbauer spectroscopy. While structural and magnetic measurements could reveal only the presence of SmCo5 and α-Fe phases, Mössbauer studies could clearly specify the extent of alloying between Fe and Co atoms in terms of evolution of α-Fe(Co) phase as a function of milling time. It has been found that the fractional volume of α-Fe(Co) solid solution tends to increase at the expense of the initial α-Fe phase upon progressive milling. |
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Keywords: | A. Rare-earth intermetallics B. Magnetic properties C. Mechanical alloying and milling D. Microstructure F. Spectroscopic methods, various |
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