Effect of alloying on magnetic properties of Fe-Cr-12 wt% Co permanent magnet alloys |
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| Authors: | Tsung-Shune Chin PY Lee CY Chang TS Wu |
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| Institution: | Department of Metallurgy and Materials Engineering National Cheng Kung University, Tainan, Taiwan, Republic of China;Department of Electrical and Electronics Engineering National Cheng Kung University, Tainan, Taiwan, Republic of China |
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| Abstract: | Effect of alloying additional elements (Al, Si, Ti, V, Ni, Cu, Zr, Nb and Mo) with Fe-22/30 wt% Cr-12 wt% Co permanent magnet alloys manufactured by magnetic aging has been systematically studied with magnetic measurements and transmission electron microscopy (TEM), on a laboratory scale. It is found that the alloying shifts the optimum Cr content to a lower lever. Ti and Si show the greatest enhancement on magnetic properties yet narrow the optimum magnetic aging temperature range. Mo, Nb and Cu, when used together with Si, promote magnetic properties and widen the optimum magnetic aging temperature range. Ni and Zr are simply magnetic diluents. V is good for the magnetic properties only at a large amount of addition. The origin of alloying effects explored by TEM microscopy is attributed to the degree of particle entanglement as well as elongation. |
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