ANISOTROPIC RARE EARTH PERMANENT MAGNET MATERIAL AND MAGNET POWDER

PROBLEM TO BE SOLVED: To obtain a composition wherein readily magnetizable axes of hard magnetic phases are oriented in a uniaxial direction, by deforming, with pressure, a quenched thin strip of alloy material in uniaxial direction while being heated. SOLUTION: A hard magnetic phase of an anisotrop...

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Bibliographic Details
Main Authors OHASHI TAKESHI, NOMURA TADAO
Format Patent
LanguageEnglish
Published 09.04.1999
Edition6
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:PROBLEM TO BE SOLVED: To obtain a composition wherein readily magnetizable axes of hard magnetic phases are oriented in a uniaxial direction, by deforming, with pressure, a quenched thin strip of alloy material in uniaxial direction while being heated. SOLUTION: A hard magnetic phase of an anisotropic rare earth permanent magnet is composed of Nd2 Fe14 B, and a soft magnetic phase thereof contains at least one or more kinds from bcc-Fe, Fe3 B and Fe2 B, the percentage of which being 10-90% of the entire volume. The melt of this composition alloy is quenched to obtain a quenched thin strip of alloy in a form of amorphous, or a mingling of amorphous and christallites. The composition of this case is so made that the hard magnetic phase and the soft magnetic phase are finely dispersed and deposited by heat treatment. Subsequently, a sample from the resultant is subjected to grinding, followed by deformation, with pressure, at a high temperature, thereby obtaining the anisotropic rare earth permanent magnet having a composition wherein readily magnetizable axes of the hard magnetic phases are oriented in uniaxial direction.
Bibliography:Application Number: JP19970255255