Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152446 | Journal of Magnetism and Magnetic Materials | 2018 | 22 Pages |
Abstract
In this study, the effect of substitution of Co with Fe on structural and magnetic characteristics of nanocrystalline Fe-Co-Cr alloys has been investigated. In this regard, different combinations of Fe, Co and Cr elements with nominal composition of Fe72âxCoxCr28 (10â¯<â¯Xâ¯<â¯22) were mechanically milled and subsequently annealed in the range of 560-640â¯Â°C. The samples were characterized using X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. Based on results, during milling process Cr and Co elements have been dissolved in Fe matrix and Fe-Cr-Co solid solution (with combination of α1 and α2 spinodal phases) has been formed. The coercivity and saturation of magnetization of formed alloys were in the range of 110-187 Oe and 150-175â¯emu/g, respectively. The coercivity of Fe72âxCoxCr28 (10â¯<â¯Xâ¯<â¯22) alloys showed an anomalous behavior at 18â¯at.% of Co as a result of optimal interaction between α1 and α2 phases in this composition. The formed Fe-Co-Cr α-phase solid solutions were not stable and transformed to Ï and γ phases during annealing process at temperatures higher than 600â¯Â°C. The formation of non-magnetic Ï and γ phases had destructive effect on magnetic properties of prepared samples with different composition.
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Authors
Elham Ghasemi, Ali Ghasemi, Morteza Hadi, Mohsen Sadeghi, Seyyed Hamid Hashemi, Majid Tavoosi, Gholam Reza Gordani,