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1. (WO2007088718) R-Fe-B RARE-EARTH SINTERED MAGNET AND PROCESS FOR PRODUCING THE SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/088718    International Application No.:    PCT/JP2007/050304
Publication Date: 09.08.2007 International Filing Date: 12.01.2007
IPC:
H01F 1/053 (2006.01), B22F 3/24 (2006.01), H01F 1/08 (2006.01), H01F 41/02 (2006.01)
Applicants: HITACHI METALS, LTD. [JP/JP]; 2-1, Shibaura 1-chome Minato-ku, Tokyo 105-8614 (JP) (For All Designated States Except US).
MORIMOTO, Hideyuki [JP/JP]; (JP) (For US Only).
ODAKA, Tomoori [JP/JP]; (JP) (For US Only).
NOUMI, Masao [JP/JP]; (JP) (For US Only)
Inventors: MORIMOTO, Hideyuki; (JP).
ODAKA, Tomoori; (JP).
NOUMI, Masao; (JP)
Agent: OKUDA, Seiji; OKUDA & ASSOCIATES 10th Floor, Osaka Securities Exchange Bldg. 8-16, Kitahama 1-chome Chuo-ku, Osaka-shi Osaka 5410041 (JP)
Priority Data:
2006-022997 31.01.2006 JP
Title (EN) R-Fe-B RARE-EARTH SINTERED MAGNET AND PROCESS FOR PRODUCING THE SAME
(FR) AIMANT FRITTE R-Fe-B ET TERRE RARE ET PROCEDE POUR LE PRODUIRE
(JA) R-Fe-B系希土類焼結磁石およびその製造方法
Abstract: front page image
(EN)An R-Fe-B rare-earth sintered magnetic object is prepared which has, as the main phase, R2Fe14B type compound crystal grains containing a light rare-earth element (RL) (at least either of Nd and Pr) as the main rare-earth element (R). Subsequently, an M layer comprising one or more metallic elements (M) (M is at least one member selected from the group consisting of Al, Ga, In, Sn, Pb, Bi, Zn, and Ag) is deposited on the surface of the sintered magnetic object. An RH layer comprising one or more heavy rare-earth elements (RH) (at least one member selected from the group consisting of Dy, Ho, and Tb) is then deposited on the M layer. Thereafter, the resultant sintered magnetic object is heated to diffuse the metallic elements (M) from the surface into inner parts of the sintered magnet and diffuse the heavy rare-earth elements (RH) from the surface into inner parts of the sintered magnet.
(FR)L'invention concerne un objet magnétique fritté R-Fe-B et terre rare dont la phase principale est formée de grains cristallins d'un composé de type R2Fe14B contenant un élément choisi parmi les terres rares légères (RL) (qui soit au moins Nd ou Pr) en tant qu'élément terre rare principal (R). Ensuite, une couche M comprenant un ou plusieurs éléments métalliques (M) (M étant au moins un élément choisi dans le groupe comprenant Al, Ga, In, Sn, Pb, Bi, Zn et Ag) est déposée sur la surface de l'objet magnétique fritté. Une couche RH comprenant un ou plusieurs élément choisis parmi les terres rares lourdes (RH) (l'un au moins de ces éléments étant choisi dans le groupe comprenant Dy, Ho et Tb) est ensuite déposée sur la couche M. L'objet magnétique fritté ainsi obtenu est alors chauffé afin de diffuser les éléments métalliques (M) et les terres rares lourdes (RH) depuis la surface jusque dans des parties intérieures de l'aimant fritté.
(JA) まず軽希土類元素RL(NdおよびPrの少なくとも1種)を主たる希土類元素Rとして含有するR2Fe14B型化合物結晶粒を主相として有するR-Fe-B系希土類焼結磁石体を用意する。次に、焼結磁石体の表面に金属元素M(MはAl、Ga、In、Sn、Pb、Bi、Zn、およびAgからなる群から選択された少なくとも1種)を含有するM層を堆積した後、重希土類元素RH(Dy、Ho、およびTbからなる群から選択された少なくとも1種)を含有するRH層をM層上に堆積する。この後、焼結磁石体を加熱し、表面から金属元素Mを焼結磁石の内部に拡散させ、また、表面から重希土類元素RHを焼結磁石体の内部に拡散させる。
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, 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, LV, LY, MA, MD, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, 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)