Processing

Please wait...

Settings

Settings

Goto Application

1. WO2005023462 - RARE EARTH MAGNET POWDER AND METHOD FOR PRODUCTION THEREOF

Publication Number WO/2005/023462
Publication Date 17.03.2005
International Application No. PCT/JP2004/006784
International Filing Date 13.05.2004
IPC
C22C 1/04 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
1Making non-ferrous alloys
04by powder metallurgy
H01F 1/057 2006.1
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
H01F 41/02 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
41Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
02for manufacturing cores, coils or magnets
CPC
C22C 1/0441
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
1Making alloys
04by powder metallurgy
0433Nickel- or cobalt-based alloys
0441Alloys based on intermetallic compounds of the type rare earth - Co, Ni
C22C 38/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
005containing rare earths, i.e. Sc, Y, Lanthanides
C22C 38/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
10containing cobalt
H01F 1/0572
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
0571in the form of particles, e.g. rapid quenched powders or ribbon flakes
0572with a protective layer
H01F 41/0253
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
41Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
02for manufacturing cores, coils, or magnets
0253for manufacturing permanent magnets
Y10T 428/2991
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428Stock material or miscellaneous articles
29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
2982Particulate matter [e.g., sphere, flake, etc.]
2991Coated
Applicants
  • 三菱マテリアル株式会社 MITSUBISHI MATERIALS CORPORATION [JP]/[JP] (AllExceptUS)
  • 日産自動車株式会社 NISSAN MOTOR CO., LTD. [JP]/[JP] (AllExceptUS)
  • 小野 孝枝 ONO, Takae [JP]/[JP] (UsOnly)
  • 森 克彦 MORI, Katsuhiko [JP]/[JP] (UsOnly)
  • 中山 亮治 NAKAYAMA, Ryoji [JP]/[JP] (UsOnly)
  • 田湯 哲朗 TAYU, Tetsurou [JP]/[JP] (UsOnly)
  • 島田 宗勝 SHIMADA, Munekatsu [JP]/[JP] (UsOnly)
  • 加納 眞 KANO, Makoto [JP]/[JP] (UsOnly)
  • 川下 宜郎 KAWASHITA, Yoshio [JP]/[JP] (UsOnly)
Inventors
  • 森 克彦 MORI, Katsuhiko
  • 中山 亮治 NAKAYAMA, Ryoji
  • 田湯 哲朗 TAYU, Tetsurou
  • 島田 宗勝 SHIMADA, Munekatsu
  • 加納 眞 KANO, Makoto
  • 川下 宜郎 KAWASHITA, Yoshio
  • 小野 秀昭 ONO, Hideaki
Agents
  • 志賀 正武 SHIGA, Masatake
Priority Data
2003-20909027.08.2003JP
2003-20947729.08.2003JP
2003-37005430.10.2003JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) RARE EARTH MAGNET POWDER AND METHOD FOR PRODUCTION THEREOF
(FR) POUDRE MAGNETIQUE DES TERRES RARES ET SON PROCEDE DE PRODUCTION
(JA) 希土類磁石粉末およびその製造方法
Abstract
(EN) A rare earth magnet powder which has a chemical composition that R: 5 to 20 % (wherein, R represents one or more of rare earth elements being exclusive of Dy and Tb and containing Y), one or two of Dy and Tb: 0.01 to 5 %, B: 3 to 20 %, and the balance: Fe and inevitable impurities, and has an average particle diameter of 10 to 1000 μm, wherein the rare earth magnet powder optionally further contains 0.1 to 50 % of Co and 0.001 to 5 % of M, and wherein 70 % or more of the surface of the rare earth magnet powder is covered with a layer being rich in the content of one or two of Dy and Tb and having a thickness of 0.05 to 50 μm, and the above Dy-Tb rich layer in a particle of the powder has such a concentration of one or two of Dy and Tb that the maximum detected intensity of the one or two of Dy and Tb in the layer, as measured by the wavelength dispersive X-ray spectroscopy, is 1.2 to 5.0 times the average detected intensity thereof in the central portion being present in the range of 1/3 of the diameter of the particle.
(FR) L'invention concerne une poudre magnétique des terres rares qui a une composition chimique où R: 5 à 20 % (R représentant un ou plusieurs éléments de terres rares exclusifs de Dy et de Tb et contenant Y), un ou deux Dy et Tb: 0,01 à 5 %, B: 3 à 20 %, le restant étant constitué de Fe et d'impuretés inévitables, et dont le diamètre particulaire moyen est compris entre 10 et 1000 $g(m)m. Ladite poudre magnétique des terres rares peut éventuellement renfermer également 0,1 à 50 % de Co et 0,001 à 5 % de M, 70 % au moins de la surface de la poudre magnétique étant couverte d'une couche riche en teneur d'un ou de deux Dy et Tb et dont l'épaisseur est comprise entre 0,05 et 50 $g(m)m. Ladite couche riche en Dy-Tb en particules de la poudre a une teneur d'au moins un Dy et Tb telle que l'intensité maximale détectée des Dy et Tb dans la couche, mesurée par spectroscopie de rayons X dispersive en longueur d'onde, équivaut à 1,2 à 5,0 fois la moyenne de l'intensité détectée dans la partie centrale présente dans la gamme de 1/3 du diamètre de la particule.
(JA) 希土類磁石粉末であって、R(ただし、Rは、DyおよびTbを除くYを含む希土類元素の内の1種または2種以上を示す。):5~20%、DyおよびTbの1種または2種を0.01~5%、B:3~20%を含有し、必要に応じてCo:0.1~50%、M:0.001~5%を含有し、残部がFeおよび不可避不純物からなる成分組成を有し、平均粉末粒径:10~1000μmを有する。この希土類磁石粉末は、厚さ:0.05~50μmを有するDyおよびTbの1種または2種の含有量が多い層で表面全体の70%以上覆われており、前記Dy-Tbリッチ層におけるDyおよびTbの1種または2種の濃度はDyおよびTbの1種または2種の波長分散型X線分光法による最大検出強度が粉末粒子の粒径の1/3の範囲内における中心部の平均検出強度の1.2~5倍である。
Related patent documents
US2007079904This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
Latest bibliographic data on file with the International Bureau