Microstructure and magnetic properties of Fe-Cr-Co alloys

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · IEEE Trans. Magn.; (United States)

DOI:https://doi.org/10.1109/TMAG.1978.1059752· OSTI ID:5374583

Okada, M ^[1]; Thomas, G; Homma, M; Kaneko, H

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1. Univ. of California, Berkeley

The microstructures of an Fe-31 wt % Cr-23 wt % Co ductile permanent magnet alloy after isothermal aging, thermomagnetic treatment, and step aging have been characterized by transmission electron microscopy and by measurement of the Curie temperature. Isothermal aging itself produces the undesirable microstructure. Aging at 600/sup 0/C develops the magnetic chromium-rich phase. Aging at 600/sup 0/C produces a nonmagnetic chromium-rich phase dispersed within the iron-rich phase. The effect of thermomagnetic treatment on the microstructure of the alloy is discussed in comparison with that of Alnico alloys. Step aging produces the desirable microstructue, viz., the elongated ferromagnetic phase imbedded in the paramagnetic phase.

• OSTI ID: 5374583
• Journal Information: IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. MAG-14:4; ISSN IEMGA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
AGING
ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
CRYSTAL STRUCTURE
DUCTILITY
ELECTRON MICROSCOPY
HARDNESS
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
PERMANENT MAGNETS
PHYSICAL PROPERTIES
PRODUCTION
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY