Effects of Chemical Composition and Heat Treatment Conditions on the Magnetic Properties and Microstructure of Cast Fe– Cr– Co Magnets

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Mohseni Zonoozi Elnaz; KIANVASH ABBAS

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Journal: FOUNDING RESEARCH JOURNAL Year:2020 | Volume:4 | Issue:1 Page(s): 11-20

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Title

Effects of Chemical Composition and Heat Treatment Conditions on the Magnetic Properties and Microstructure of Cast Fe– Cr– Co Magnets

Author(s)

Mohseni Zonoozi Elnaz | KIANVASH ABBAS | Issue Writer Certificate

Keywords

Fe-Cr-Co magnet

Thermomagnetic treatment

Permanent magnet

Spinodal decomposition

Abstract

In this study two Fe-Cr-Co base alloys with typical compositions Fe-28Cr-15Co-1 Si (alloy A) and Fe-32Cr-23Co-1 Si (alloy B) were prepared by casting technique and anisotropic Permanent magnets were produced by applying some special heat treatments. Studies revealed that the magnetic properties of investigated alloys are very low in as-cast and in solution annealed conditions but are significantly enhanced by applying TMT. The presence of a sideband alongside the (110) reflection peak in X-ray diffraction pattern after TMT demonstrated that Spinodal decomposition was occurred in this stage of heat treatment. During the step aging treatment, chemical compositions of the two spinodal phases (α 1 and α 2) are changed which results in an increase in Jsα 1-Jsα 2 and therefore, the coercivity is increased. Moreover this study revealed that magnetic properties obtained in Fe-28Cr15Co-1Si alloy was as Br = 0. 72 T, Hc = 60. 50 kA/m and (BH) max= 31. 19 kJ/m 3 and was higher than Fe-32Cr-23Co-1Si. Microstructural investigations showed that in the Fe-32Cr23Co-1Si alloy with a higher chromium percentage, the non-magnetic sigma phase was formed, leading to a decrease in the magnetic properties.

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APA: Copy

Mohseni Zonoozi, Elnaz, & KIANVASH, ABBAS. (2020). Effects of Chemical Composition and Heat Treatment Conditions on the Magnetic Properties and Microstructure of Cast Fe– Cr– Co Magnets. FOUNDING RESEARCH JOURNAL, 4(1 ), 11-20. SID. https://sid.ir/paper/398186/en

Vancouver: Copy

Mohseni Zonoozi Elnaz, KIANVASH ABBAS. Effects of Chemical Composition and Heat Treatment Conditions on the Magnetic Properties and Microstructure of Cast Fe– Cr– Co Magnets. FOUNDING RESEARCH JOURNAL[Internet]. 2020;4(1 ):11-20. Available from: https://sid.ir/paper/398186/en

IEEE: Copy

Elnaz Mohseni Zonoozi, and ABBAS KIANVASH, “Effects of Chemical Composition and Heat Treatment Conditions on the Magnetic Properties and Microstructure of Cast Fe– Cr– Co Magnets,” FOUNDING RESEARCH JOURNAL, vol. 4, no. 1 , pp. 11–20, 2020, [Online]. Available: https://sid.ir/paper/398186/en

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