Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2013122255) R-T-B SINTERED MAGNET
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2013/122255 International Application No.: PCT/JP2013/054064
Publication Date: 22.08.2013 International Filing Date: 13.02.2013
IPC:
H01F 1/057 (2006.01) ,B22F 3/00 (2006.01) ,C22C 33/02 (2006.01) ,C22C 38/00 (2006.01) ,H01F 1/08 (2006.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
032
of hard-magnetic materials
04
metals or alloys
047
Alloys characterised by their composition
053
containing rare earth metals
055
and magnetic transition metals, e.g. SmCo5
057
and IIIa elements, e.g. Nd2Fe14B
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
33
Making ferrous alloys
02
by powder metallurgy
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
032
of hard-magnetic materials
04
metals or alloys
06
in the form of particles, e.g. powder
08
pressed, sintered, or bound together
Applicants:
TDK株式会社 TDK CORPORATION [JP/JP]; 東京都港区芝浦三丁目9番1号 3-9-1, Shibaura, Minato-ku, Tokyo 1080023, JP
Inventors:
三輪 将史 MIWA, Masashi; JP
中嶋 春菜 NAKAJIMA, Haruna; JP
西川 健一 NISHIKAWA, Ken-ichi; JP
日▲高▼ 徹也 HIDAKA, Tetsuya; JP
萩原 淳 HAGIWARA, Jun; JP
石坂 力 ISHIZAKA, Chikara; JP
Agent:
前田・鈴木国際特許業務法人 Maeda & Suzuki; 東京都千代田区神田神保町1丁目1番1号 東京堂神保町第3ビル2階 2F, Tokyodo Jinboucho 3rd Bldg., 1-17, Kandajinboucho 1-chome, Chiyoda-ku, Tokyo 1010051, JP
Priority Data:
2012-02896113.02.2012JP
2012-07854830.03.2012JP
Title (EN) R-T-B SINTERED MAGNET
(FR) AIMANT FRITTÉ EN R-T-B
(JA) R-T-B系焼結磁石
Abstract:
(EN) The R-T-B sintered magnet according to the present invention is an R-T-B sintered magnet having R2T14B crystal grains, and is characterised by including, at grain boundaries formed by at least two adjacent R2T14B crystal grains, R-O-C concentration sections in which the R, O and C concentration is greater than in the R2T14B crystal grains, with the ratio (O/R) of O atoms to R atoms in the R-O-C concentration sections satisfying formula (1). 0.4<(O/R)<0.7...(1)
(FR) L'aimant fritté en R-T-B selon la présente invention est un aimant fritté en R-T-B ayant des grains cristallins R2T14B et se caractérise en ce qu'il comprend, au niveau des joints de grains formés par au moins deux grains cristallins R2T14B adjacents, des sections de concentration R-O-C dans lesquelles la concentration de R, O et C est supérieure à celle dans les grains cristallins R2T14B, le rapport (O/R) entre les atomes O et les atomes R dans les sections de concentration R-O-C satisfaisant à la formule (1). 0,4 < (O/R) < 0,7 (1)
(JA) 本発明に係るR-T-B系焼結磁石は、R214B結晶粒を有するR-T-B系焼結磁石であって、隣り合う2つ以上のR214B結晶粒によって形成された粒界中に、R214B結晶粒内よりも、R、O及びCの濃度がともに高いR-O-C濃縮部を有し、R-O-C濃縮部におけるR原子に対するO原子の比率(O/R)が、下記式(1)を満たすことを特徴とする。 0.4<(O/R)<0.7・・・(1)
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)