EP1460650A4 - R-t-b based rare earth element permanent magnet - Google Patents

R-t-b based rare earth element permanent magnet

Info

Publication number
EP1460650A4
EP1460650A4 EP03748612A EP03748612A EP1460650A4 EP 1460650 A4 EP1460650 A4 EP 1460650A4 EP 03748612 A EP03748612 A EP 03748612A EP 03748612 A EP03748612 A EP 03748612A EP 1460650 A4 EP1460650 A4 EP 1460650A4
Authority
EP
European Patent Office
Prior art keywords
permanent magnet
rare earth
earth element
based rare
element permanent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03748612A
Other languages
German (de)
French (fr)
Japanese (ja)
Other versions
EP1460650B1 (en
EP1460650A1 (en
Inventor
Chikara Ishizaka
Gouichi Nishizawa
Tetsuya Hidaka
Akira Fukuno
Nobuya Uchida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Publication of EP1460650A1 publication Critical patent/EP1460650A1/en
Publication of EP1460650A4 publication Critical patent/EP1460650A4/en
Application granted granted Critical
Publication of EP1460650B1 publication Critical patent/EP1460650B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy
    • C22C33/0228—Using a mixture of prealloyed powders or a master alloy comprising other non-metallic compounds or more than 5% of graphite
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus 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
    • H01F41/02—Apparatus 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 for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus 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 for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C2202/00—Physical properties
    • C22C2202/02—Magnetic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

An R-T-B based rare earth element permanent magnet which comprises a sintered product having a main phase comprising an R2T14B phase, where R represents one or more rare elements including Y and T represents one or more transition metal elements comprising Fe or Fe and Co, and a grain boundary phase containing R in a content more than that in the main phase, wherein a product being rich in Zr and having the form of a plate or a needle is present in the R2T14B phase. The R-T-B based rare earth element permanent magnet containing the above allows the suppression of the growth of grains in combination of the minimization of the lowering of magnetic characteristics, and also allows the improvement of the width of sintering temperature.
EP03748612A 2002-09-30 2003-09-30 R-t-b based rare earth element permanent magnet Expired - Lifetime EP1460650B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2002287033 2002-09-30
JP2002287033 2002-09-30
JP2003092890 2003-03-28
JP2003092890 2003-03-28
PCT/JP2003/012491 WO2004029999A1 (en) 2002-09-30 2003-09-30 R-t-b based rare earth element permanent magnet

Publications (3)

Publication Number Publication Date
EP1460650A1 EP1460650A1 (en) 2004-09-22
EP1460650A4 true EP1460650A4 (en) 2005-03-30
EP1460650B1 EP1460650B1 (en) 2007-11-14

Family

ID=32044658

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03748612A Expired - Lifetime EP1460650B1 (en) 2002-09-30 2003-09-30 R-t-b based rare earth element permanent magnet
EP03748613A Expired - Lifetime EP1460651B1 (en) 2002-09-30 2003-09-30 Method for producing r-t-b based rare earth element permanent magnet

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03748613A Expired - Lifetime EP1460651B1 (en) 2002-09-30 2003-09-30 Method for producing r-t-b based rare earth element permanent magnet

Country Status (5)

Country Link
EP (2) EP1460650B1 (en)
JP (2) JP4076179B2 (en)
CN (2) CN1295713C (en)
DE (2) DE60311960T2 (en)
WO (2) WO2004029999A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7199690B2 (en) 2003-03-27 2007-04-03 Tdk Corporation R-T-B system rare earth permanent magnet
EP1749599B1 (en) * 2004-04-30 2015-09-09 Hitachi Metals, Ltd. Methods for producing raw material alloy for rare earth magnet, powder and sintered magnet
JP4618437B2 (en) * 2006-03-30 2011-01-26 Ｔｄｋ株式会社 Method for producing rare earth permanent magnet and raw material alloy thereof
CN101471165B (en) * 2007-12-26 2012-09-19 北京中科三环高技术股份有限公司 NbFeB sintered rare earth permanent magnet alloy and method for producing the same
CN101819841A (en) * 2010-05-17 2010-09-01 上海交通大学 Neodymium iron boron magnetic material and preparation method thereof
DE112013003109T5 (en) * 2012-06-22 2015-02-26 Tdk Corp. Sintered magnet
JP6314380B2 (en) * 2013-07-23 2018-04-25 Tdk株式会社 Rare earth magnet, electric motor, and device including electric motor
CN106782971A (en) * 2016-12-05 2017-05-31 湖南航天磁电有限责任公司 A kind of NdFeB material and preparation method thereof
WO2018121112A1 (en) * 2016-12-29 2018-07-05 北京中科三环高技术股份有限公司 Fine grain rare earth alloy casting piece, preparation method, and rotary cooling roller device
CN107358998A (en) * 2017-07-20 2017-11-17 杭州乐荣电线电器有限公司 Flat anti-interference foldable soft data line
JP7463791B2 (en) * 2020-03-23 2024-04-09 Tdk株式会社 R-T-B rare earth sintered magnet and method for producing the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242187A1 (en) * 1986-04-15 1987-10-21 TDK Corporation Permanent magnet and method of producing same
EP0302395A1 (en) * 1987-07-30 1989-02-08 TDK Corporation Permanent magnets
US4895607A (en) * 1988-07-25 1990-01-23 Kubota, Ltd. Iron-neodymium-boron permanent magnet alloys prepared by consolidation of amorphous powders
JPH1041113A (en) * 1996-07-25 1998-02-13 Mitsubishi Materials Corp Rare earth magnet material powder having superior magnetic characteristics and manufacture thereof
JPH10259459A (en) * 1997-01-14 1998-09-29 Mitsubishi Materials Corp Raw material alloy for producing rare earth magnet powder and production of rare earth magnet powder using this raw material alloy
EP1014392A2 (en) * 1998-12-15 2000-06-28 Shin-Etsu Chemical Co., Ltd. Rare earth/iron/boron-based permanent magnet alloy composition
EP1164599A2 (en) * 2000-06-13 2001-12-19 Shin-Etsu Chemical Co., Ltd. R-Fe-B base permanent magnet materials

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01196104A (en) * 1988-02-01 1989-08-07 Tdk Corp Manufacture of rare earth alloy magnet
JP3367726B2 (en) * 1993-11-08 2003-01-20 ティーディーケイ株式会社 Manufacturing method of permanent magnet
JP3724513B2 (en) * 1993-11-02 2005-12-07 Ｔｄｋ株式会社 Method for manufacturing permanent magnet
US5858123A (en) * 1995-07-12 1999-01-12 Hitachi Metals, Ltd. Rare earth permanent magnet and method for producing the same
JP2891215B2 (en) * 1996-12-17 1999-05-17 三菱マテリアル株式会社 Method for producing rare earth-B-Fe based sintered magnet excellent in corrosion resistance and magnetic properties
JPH1064712A (en) * 1997-07-18 1998-03-06 Hitachi Metals Ltd R-fe-b rare earth sintered magnet
DE69815146T2 (en) * 1998-08-28 2004-02-26 Showa Denko K.K. ALLOY FOR USE IN PRODUCING R-T-B BASED MAGNETIC MAGNETS AND METHOD FOR PRODUCING R-T-B BASED MAGNETIC MAGNETS
CN1169165C (en) * 1998-10-14 2004-09-29 日立金属株式会社 R-T-B series sintered permanent magnet
JP3951099B2 (en) * 2000-06-13 2007-08-01 信越化学工業株式会社 R-Fe-B rare earth permanent magnet material
JP2002164239A (en) * 2000-09-14 2002-06-07 Hitachi Metals Ltd Manufacturing method of rare earth sintered magnet, ring magnet, and arc segment magnet
JP3452254B2 (en) * 2000-09-20 2003-09-29 愛知製鋼株式会社 Method for producing anisotropic magnet powder, raw material powder for anisotropic magnet powder, and bonded magnet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242187A1 (en) * 1986-04-15 1987-10-21 TDK Corporation Permanent magnet and method of producing same
EP0302395A1 (en) * 1987-07-30 1989-02-08 TDK Corporation Permanent magnets
US4895607A (en) * 1988-07-25 1990-01-23 Kubota, Ltd. Iron-neodymium-boron permanent magnet alloys prepared by consolidation of amorphous powders
JPH1041113A (en) * 1996-07-25 1998-02-13 Mitsubishi Materials Corp Rare earth magnet material powder having superior magnetic characteristics and manufacture thereof
JPH10259459A (en) * 1997-01-14 1998-09-29 Mitsubishi Materials Corp Raw material alloy for producing rare earth magnet powder and production of rare earth magnet powder using this raw material alloy
EP1014392A2 (en) * 1998-12-15 2000-06-28 Shin-Etsu Chemical Co., Ltd. Rare earth/iron/boron-based permanent magnet alloy composition
EP1164599A2 (en) * 2000-06-13 2001-12-19 Shin-Etsu Chemical Co., Ltd. R-Fe-B base permanent magnet materials

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
BESENICAR S: "THE INFLUENCE OF ZRO2 ADDITION ON THE MICROSTRUCTURE AND THE MAGNETIC PROPERTIES OF ND-DY-FE-B MAGNETS", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 104 - 107, no. PART 2, 1 February 1992 (1992-02-01), pages 1175 - 1178, XP000329968, ISSN: 0304-8853 *
KIM A S ET AL: "MICROSTRUCTURE OF ZR CONTAINING NDFEB", IEEE TRANSACTIONS ON MAGNETICS, IEEE INC. NEW YORK, US, vol. 33, no. 5, PART 2, September 1997 (1997-09-01), pages 3823 - 3825, XP000703229, ISSN: 0018-9464 *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31) *
POLLARD R J ET AL: "EFFECT OF ZR ADDITIONS ON THE MICROSTRUCTURAL AND MAGNETIC PROPERTIES OF NDFEB BASED MAGNETS", IEEE TRANSACTIONS ON MAGNETICS, IEEE INC. NEW YORK, US, vol. 24, no. 2, 1 March 1988 (1988-03-01), pages 1626 - 1628, XP000174162, ISSN: 0018-9464 *
See also references of WO2004029999A1 *

Also Published As

Publication number Publication date
EP1460650B1 (en) 2007-11-14
WO2004029999A1 (en) 2004-04-08
JPWO2004030000A1 (en) 2006-01-26
DE60311960T2 (en) 2007-10-31
DE60311960D1 (en) 2007-04-05
EP1460651B1 (en) 2007-02-21
CN1572006A (en) 2005-01-26
DE60317460T2 (en) 2008-09-18
EP1460651A1 (en) 2004-09-22
CN1295713C (en) 2007-01-17
EP1460650A1 (en) 2004-09-22
EP1460651A4 (en) 2005-03-23
CN100334662C (en) 2007-08-29
DE60317460D1 (en) 2007-12-27
JP4076179B2 (en) 2008-04-16
JPWO2004029999A1 (en) 2006-01-26
JP4076178B2 (en) 2008-04-16
CN1572005A (en) 2005-01-26
WO2004030000A1 (en) 2004-04-08

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