کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1621015 | 1516397 | 2009 | 6 صفحه PDF | دانلود رایگان |
The influence of milling and subsequent annealing on the microstructural and magnetic properties of Fe90Co10 and Fe65Co35 alloys is investigated. After milling for 8 h a body-centred cubic nanostructured Fe–Co alloy forms with an average crystallite size of about 12 nm. The magnetization saturation (MS) increases ∼16% for Fe65Co35 and 5% for Fe90Co10 alloys by milling for 8 h. Subsequent annealing of Fe90Co10 and Fe65Co35 powders for 105 min at 550 °C improves the MS about 6 and 11%, respectively. Before annealing, the coercivity increases (up to 60 Oe) by milling for 3 h, followed by a reduction on milling for longer periods (45 h). At the initial stage of the heating, a sharp decrease in HC to 8–10 Oe occurs due to the relief of internal strain. Further heating leads to an increase in the coercivity (intermediate times) followed by a slight diminution on heating for final stage.
Journal: Journal of Alloys and Compounds - Volume 480, Issue 2, 8 July 2009, Pages 161–166