EP0434113A3 - Alloying low-level additives into hot-worked nd-fe-b magnets - Google Patents

Alloying low-level additives into hot-worked nd-fe-b magnets Download PDF

Info

Publication number: EP0434113A3
Authority: EP; European Patent Office
Prior art keywords: magnets; worked; hot; alloying low; level additives
Prior art date: 1989-12-19
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

EP19900203171

Other versions

EP0434113B1 (en

EP0434113A2 (en

Inventor

Earl G. Brewer

Carlon D. Fuerst

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.)

Motors Liquidation Co

Original Assignee

Motors Liquidation Co

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.)

1989-12-19

Filing date

1990-12-01

Publication date

1992-04-08

1990-12-01 Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co

1991-06-26 Publication of EP0434113A2 publication Critical patent/EP0434113A2/en

1992-04-08 Publication of EP0434113A3 publication Critical patent/EP0434113A3/en

1994-03-02 Application granted granted Critical

1994-03-02 Publication of EP0434113B1 publication Critical patent/EP0434113B1/en

2010-12-01 Anticipated expiration legal-status Critical

Status 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
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
- C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
- 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
- H01F1/0576—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 pressed, e.g. hot working

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Crystallography & Structural Chemistry (AREA)
Inorganic Chemistry (AREA)
Power Engineering (AREA)
Hard Magnetic Materials (AREA)
Manufacturing Cores, Coils, And Magnets (AREA)
Powder Metallurgy (AREA)

EP19900203171 1989-12-19 1990-12-01 Alloying low-level additives into hot-worked Nd-Fe-B magnets Expired - Lifetime EP0434113B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US45343489A	1989-12-19	1989-12-19
US453434		1989-12-19

Publications (3)

Publication Number	Publication Date
EP0434113A2 EP0434113A2 (en)	1991-06-26
EP0434113A3 true EP0434113A3 (en)	1992-04-08
EP0434113B1 EP0434113B1 (en)	1994-03-02

Family

ID=23800570

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19900203171 Expired - Lifetime EP0434113B1 (en)	1989-12-19	1990-12-01	Alloying low-level additives into hot-worked Nd-Fe-B magnets

Country Status (4)

Country	Link
EP (1)	EP0434113B1 (en)
JP (1)	JPH0739618B2 (en)
CA (1)	CA2023924A1 (en)
DE (1)	DE69007048T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2012090765A1 (en) *	2010-12-27	2012-07-05	Tdk株式会社	Magnetic body
JP5729051B2 (en) *	2011-03-18	2015-06-03	Tdk株式会社	R-T-B rare earth sintered magnet
CN112863848B (en) *	2021-01-15	2023-04-11	烟台东星磁性材料股份有限公司	Preparation method of high-coercivity sintered neodymium-iron-boron magnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3839545A1 (en) *	1987-11-27	1989-06-08	Hitachi Metals Ltd	METHOD AND DEVICE FOR PRODUCING A MAGNETICALLY ANISOTROPIC MATERIAL
US4881985A (en) *	1988-08-05	1989-11-21	General Motors Corporation	Method for producing anisotropic RE-FE-B type magnetically aligned material
US4950450A (en) *	1988-07-21	1990-08-21	Eastman Kodak Company	Neodymium iron boron magnets in a hot consolidation process of making the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS63272009A (en) *	1987-04-30	1988-11-09	Daido Steel Co Ltd	Manufacture of rare earth-fe-b magnet
JPH01175705A (en) *	1987-12-29	1989-07-12	Daido Steel Co Ltd	Manufacture of rare earth magnet
JPH01196104A (en) *	1988-02-01	1989-08-07	Tdk Corp	Manufacture of rare earth alloy magnet

1990
- 1990-08-23 CA CA 2023924 patent/CA2023924A1/en not_active Abandoned
- 1990-12-01 EP EP19900203171 patent/EP0434113B1/en not_active Expired - Lifetime
- 1990-12-01 DE DE1990607048 patent/DE69007048T2/en not_active Expired - Fee Related
- 1990-12-19 JP JP2403786A patent/JPH0739618B2/en not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3839545A1 (en) *	1987-11-27	1989-06-08	Hitachi Metals Ltd	METHOD AND DEVICE FOR PRODUCING A MAGNETICALLY ANISOTROPIC MATERIAL
US4950450A (en) *	1988-07-21	1990-08-21	Eastman Kodak Company	Neodymium iron boron magnets in a hot consolidation process of making the same
US4881985A (en) *	1988-08-05	1989-11-21	General Motors Corporation	Method for producing anisotropic RE-FE-B type magnetically aligned material

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
APPLIED PHYSICS LETTERS. vol. 56, no. 22, May 1990, NEW YORK US pages 2252 - 2254; C.D FUERST ET AL: 'Enhanced coercivities in die -upset Nd-Fe-B magnets with diffusion-alloyed additives ( Zn,Cu, and Ni)' *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 513 (E-847)(3861) 16 November 1989 & JP-1 208 813 ( MATSUSHITA ) 22 August 1989 *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 97 (E-723)(3445) 7 March 1989 & JP-63 272 009 *

Also Published As

Publication number	Publication date
DE69007048D1 (en)	1994-04-07
JPH03267346A (en)	1991-11-28
CA2023924A1 (en)	1991-06-20
DE69007048T2 (en)	1994-06-01
JPH0739618B2 (en)	1995-05-01
EP0434113B1 (en)	1994-03-02
EP0434113A2 (en)	1991-06-26

Legal Events

Date	Code	Title	Description
1991-05-09	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1991-06-26	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB NL
1992-02-18	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1992-04-08	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB NL
1992-06-24	17P	Request for examination filed	Effective date: 19920427
1993-05-19	17Q	First examination report despatched	Effective date: 19930401
1994-01-14	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1994-03-02	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB NL
1994-04-07	REF	Corresponds to:	Ref document number: 69007048 Country of ref document: DE Date of ref document: 19940407
1994-06-24	ET	Fr: translation filed
1994-12-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19941201
1995-01-05	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1995-01-05	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1995-02-22	26N	No opposition filed
1995-07-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19950701
1995-07-26	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19941201
1995-08-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19950831
1995-09-01	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 19950701
1995-09-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19950901
1995-10-27	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST

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