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1. WO2022004081 - RARE EARTH-IRON-NITROGEN-BASED MAGNETIC POWDER, COMPOUND FOR BOND MAGNET, BOND MAGNET, AND METHOD FOR PRODUCING RARE EARTH-IRON-NITROGEN-BASED MAGNETIC POWDER

Publication Number WO/2022/004081
Publication Date 06.01.2022
International Application No. PCT/JP2021/013896
International Filing Date 31.03.2021
IPC
B22F 1/02 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
02comprising coating of the powder
B22F 1/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
B22F 3/00 2021.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
H01F 1/059 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
059and Va elements, e.g. Sm2Fe17N2
H01F 1/06 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
06in the form of particles, e.g. powder
CPC
B22F 1/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties
B22F 3/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
H01F 1/059
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
059and Va elements, e.g. Sm2Fe17N2
H01F 1/06
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
06in the form of particles, e.g. powder
H01F 1/08
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
06in the form of particles, e.g. powder
08pressed, sintered, or bound together
Applicants
  • 国立大学法人東北大学 TOHOKU UNIVERSITY [JP]/[JP]
  • 住友金属鉱山株式会社 SUMITOMO METAL MINING CO., LTD. [JP]/[JP]
Inventors
  • 杉本 諭 SUGIMOTO Satoshi
  • 松浦 昌志 MATSUURA Masashi
  • 石川 尚 ISHIKAWA Takashi
  • 米山 幸伸 YONEYAMA Yukinobu
Agents
  • 正林 真之 SHOBAYASHI Masayuki
  • 林 一好 HAYASHI Kazuyoshi
Priority Data
2020-11114429.06.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) RARE EARTH-IRON-NITROGEN-BASED MAGNETIC POWDER, COMPOUND FOR BOND MAGNET, BOND MAGNET, AND METHOD FOR PRODUCING RARE EARTH-IRON-NITROGEN-BASED MAGNETIC POWDER
(FR) POUDRE MAGNÉTIQUE À BASE DE TERRES RARES-FER-AZOTE, COMPOSÉ POUR AIMANT DE LIAISON, AIMANT DE LIAISON ET PROCÉDÉ DE PRODUCTION DE POUDRE MAGNÉTIQUE À BASE DE TERRES RARES-FER-AZOTE
(JA) 希土類鉄窒素系磁性粉末、ボンド磁石用コンパウンド、ボンド磁石及び希土類鉄窒素系磁性粉末の製造方法
Abstract
(EN) This invention pertains to: a rare earth-iron-nitrogen-based magnetic powder having excellent heat resistance and magnetic properties, and a method for producing the same; and a compound which is for a bond magnet and contains a rare earth-iron-nitrogen-based magnetic powder, and a bond magnet. A rare earth-iron-nitrogen-based magnetic powder according to this invention contains, as main constituent components, a rare-earth element (R), iron (Fe), and nitrogen (N). Moreover, this magnetic powder has an average particle diameter of 1.0-10.0 μm, and contains 22.0-30.0 mass% of a rare-earth element (R) and 2.5-4.0 mass% of nitrogen (N). Further, this magnetic powder includes: a core part having any one crystal structure among a Th2Zn17 type, a Th2Ni17 type, and a TbCu7 type; and a shell layer provided on the surface of the core part and having a thickness of 1-30 nm. The shell layer contains a rare-earth element (R) and iron (Fe) so that the R/Fe atomic ratio is 0.3-5.0, and further contains 0-10 at% (exclusive of 0) of nitrogen (N). Furthermore, this magnetic powder contains compound particles composed of a rare-earth element (R) and phosphorus (P).
(FR) La présente invention concerne : une poudre magnétique à base de terres rares-fer-azote présentant une excellente résistance à la chaleur et d'excellentes propriétés magnétiques, et son procédé de production; et un composé qui est destiné à un aimant de liaison et qui contient une poudre magnétique à base de terres rares-fer-azote, et un aimant de liaison. Une poudre magnétique à base de terres rares-fer-azote selon la présente invention contient, en tant que composants constitutifs principaux, un élément de terres rares (R), du fer (Fe) et de l'azote (N). De plus, cette poudre magnétique a un diamètre moyen de particule de 1,0 à 10,0 µm, et contient de 22,0 à 30,0 % en masse d'un élément de terres rares (R) et de 2,5 à 4,0 % en masse d'azote (N). En outre, cette poudre magnétique comprend : une partie centrale ayant une quelconque structure cristalline parmi un type Th2Zn17, un type Th2Ni17 et un type TbCu7; et une couche d'enveloppe située sur la surface de la partie centrale et ayant une épaisseur de 1 à 30 nm. La couche d'enveloppe contient un élément de terres rares (R) et du fer (Fe) de sorte que le rapport atomique R/Fe est de 0,3 à 5,0, et contient en outre de 0 à 10 % d'atomes (à l'exclusion de 0) d'azote (N). De plus, cette poudre magnétique contient des particules de composé composées d'un élément de terres rares (R) et de phosphore (P).
(JA) この発明は、耐熱性及び磁気特性に優れる希土類鉄窒素系磁性粉末及びその製造方法、並びに希土類鉄窒素系磁性粉末を含むボンド磁石用コンパウンド及びボンド磁石に関する。この発明の希土類鉄窒素系磁性粉末は、希土類元素(R)、鉄(Fe)及び窒素(N)を主構成成分として含む。またこの磁性粉末は、その平均粒径が1.0μm以上10.0μm以下であり、且つ希土類元素(R)を22.0質量%以上30.0質量%以下、窒素(N)を2.5質量%以上4.0質量%以下の量で含む。さらにこの磁性粉末は、ThZn17型、ThNi17型及びTbCu型のいずれかの結晶構造を有するコア部と、前記コア部の表面に設けられる厚さ1nm以上30nm以下のシェル層と、を備える。シェル層は、希土類元素(R)及び鉄(Fe)をR/Fe原子比で0.3以上5.0以下となるように含み、さらに窒素(N)を0原子%超10原子%以下の量で含む。またこの磁性粉末は、希土類元素(R)及び燐(P)から構成される化合物粒子を含む。
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