کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1530775 | 1511998 | 2009 | 5 صفحه PDF | دانلود رایگان |
Ni–Fe based alloy powders are interesting materials for their application as soft magnetic material with low coercivity and high permeability. In this study, nanocrystalline Ni0.77Fe0.16Cu0.05Cr0.02 (Mumetal) alloy powders were synthesized by mechanical alloying process using planetary high-energy ball mill under argon atmosphere. The alloy formation and different physical properties were studied as a function of milling time (h), ranging from 0 h to 96 h, using X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and the vibrating sample magnetometer (VSM). The complete phase formation of γ-(Fe, Ni, Cu, Cr) is observed after 12 h milling time. Powder morphology at different stages was examined by SEM and different particle shape was observed. Saturation magnetization and coercivity derived from the hysteresis curves are discussed as a function of milling time and showed that saturation magnetization increases and coercivity decreases with milling time. Increase in milling time, led to reduction in crystallite size 〈D〉 and increase in lattice parameter 〈a〉, thus inducing a higher magnetization and lower coercitivity.
Journal: Materials Science and Engineering: B - Volume 157, Issues 1–3, 15 February 2009, Pages 53–57