Long-term stability of Fe-B-Nd-Dy alloys made by Dy/sub 2/O/sub 3/ additions

Journal Article · Tue Nov 15 04:00:00 EST 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342402· OSTI ID:6729025

Doser, M; Keeler, G

For several years efforts have been devoted to increasing the coercivity of Fe-B-Nd alloys in an effort to increase the magnetic stability of this product. Some authors have shown that coercivity can be increased and irreversible losses reduced by alloying Dy with Fe-B-Nd. Ghandehari has shown that Dy/sub 2/O/sub 3/ can be added to milled Fe-B-Nd powder compositions before sintering to increase coercivity. In this paper we studied the effects of long-term aging in air on magnets at 100 and 150 /sup 0/C for periods up to 1500 h for selected Fe-B-Nd-Dy alloys made by the oxide addition method and compared these to an alloy made by vacuum melting the elemental metals. Metallography and microprobe data are also presented.

• Research Organization: Hitachi Magnetics Corp., Edmore, Michigan 48829
• OSTI ID: 6729025
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
CHEMICAL REACTIONS
COERCIVE FORCE
DYSPROSIUM ALLOYS
FABRICATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETS
MELTING
NEODYMIUM ALLOYS
OXIDATION
PERMANENT MAGNETS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS