Fe-Nd-B magnets via the hot extrusion of amorphous powders

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Journal of Metals; (USA)

DOI:https://doi.org/10.1007/BF03220332· OSTI ID:5572640

Yang, C J; Ray, R ^[1]

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1. Marko Materials, Inc., North Billerica, MA (USA)

This article describes a rapid solidification melt spinning technique has been developed to produce amorphous powders of Fe-Nd-B alloys modified with hafnium diboride. The amorphous powders are consolidated by the hot extrusion technique into bulk magnets of various cross sections. Consolidated magnets show ultrafine grain structure stabilized by ultrafine submicron hafnium diboride particles. The extruded magnets develop strong texture-induced magnetic anisotropy which leads to attractive energy product values of up to 16 MGOe. Significant improvement in coercivity is also achieved due to ultrafine grain structure of the extruded magnets.

• OSTI ID: 5572640
• Journal Information: Journal of Metals; (USA), Vol. 41:9; ISSN 0148-6608
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
BORON ALLOYS
SOLIDIFICATION
IRON ALLOYS
MAGNETS
FABRICATION
NEODYMIUM ALLOYS
AMORPHOUS STATE
ANISOTROPY
CHEMICAL COMPOSITION
EXTRUSION
HAFNIUM ADDITIONS
MAGNETIC SUSCEPTIBILITY
MODIFICATIONS
POWDER METALLURGY
POWDERS
ALLOYS
HAFNIUM ALLOYS
MAGNETIC PROPERTIES
MATERIALS WORKING
METALLURGY
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
420201* - Engineering- Cryogenic Equipment & Devices
360101 - Metals & Alloys- Preparation & Fabrication
360104 - Metals & Alloys- Physical Properties