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1. EP2735003 - MAGNETIC MATERIAL AND METHOD FOR PRODUCING SAME

Office
European Patent Office
Application Number 12729553
Application Date 20.06.2012
Publication Number 2735003
Publication Date 28.05.2014
Publication Kind A1
IPC
H01F 1/057
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
047Alloys characterised by their composition
053containing rare earth metals
055and magnetic transition metals, e.g. SmCo5
057and IIIa elements, e.g. Nd2Fe14B
CPC
H01F 1/01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
B22F 9/023
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
023Hydrogen absorption
B22F 2999/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2999Aspects linked to processes or compositions used in powder metallurgy
C01B 35/04
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
35Boron; Compounds thereof
02Boron; Borides
04Metal borides
C21D 2201/03
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
2201Treatment for obtaining particular effects
03Amorphous or microcrystalline structure
C22C 33/0207
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
02by powder metallurgy
0207Using a mixture of prealloyed powders or a master alloy
Applicants BOSCH GMBH ROBERT
AICHI STEEL CORP
Inventors GÜTH KONRAD
GUTFLEISCH OLIVER
Designated States
Title
(DE) MAGNETISCHES MATERIAL UND VERFAHREN ZU DESSEN HERSTELLUNG
(EN) MAGNETIC MATERIAL AND METHOD FOR PRODUCING SAME
(FR) MATÉRIAU MAGNÉTIQUE ET SON PROCÉDÉ DE PRODUCTION
Abstract
(DE)
Es wird ein Verfahren zur Herstellung eines magnetischen Materials beschrieben, wobei das magnetische Material aus einem Ausgangsmaterial besteht, das ein Selten Erdmetall (SE) und mindestens ein Übergangsmetall umfasst, und das Verfahren die nachfolgenden Schritte umfasst: - Hydrierung des Ausgangsmaterials, - Disproportionierung des Ausgangsmaterials, - Desorption, und - Rekombination, wobei während mindestens eines Schrittes ein Magnetfeld derart anliegt, dass ein texturiertes magnetisches Material erhalten wird und die Bildung einer Textur in dem magnetischen Material gefördert wird.

(EN)
The invention relates to a method for producing a magnetic material, said magnetic material consisting of a starting material that comprises a rare earth metal (SE) and at least one transition metal. The method has the following steps: - hydrogenating the starting material, - disproportioning the starting material, - desorption, and - recombination. A magnetic field is applied during at least one step such that a textured magnetic material is obtained and the formation of a texture is promoted in the magnetic material.

(FR)
L'invention concerne un procédé de production d'un matériau magnétique, le matériau magnétique étant constitué d'un matériau de départ comprenant un métal des terres rares (SE) et au moins un métal de transition, et le procédé comprenant les étapes suivantes : Hydratation du matériau départ, dismutation du matériau de départ, désorption et recombinaison. Un champ magnétique est appliqué au cours d'au moins une étape de manière à permettre l'obtention d'un matériau magnétique texturé et à activer la création d'une texture dans le matériau magnétique.