EP0860014A1 - MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB - Google Patents

MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB

Info

Publication number
EP0860014A1
EP0860014A1 EP96938104A EP96938104A EP0860014A1 EP 0860014 A1 EP0860014 A1 EP 0860014A1 EP 96938104 A EP96938104 A EP 96938104A EP 96938104 A EP96938104 A EP 96938104A EP 0860014 A1 EP0860014 A1 EP 0860014A1
Authority
EP
European Patent Office
Prior art keywords
weight
magnetic material
ndfeb
material according
materials
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.)
Ceased
Application number
EP96938104A
Other languages
German (de)
English (en)
Inventor
Bernd Grieb
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.)
Magnetfabrik Schramberg & Co GmbH
Original Assignee
Magnetfabrik Schramberg & Co GmbH
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 Magnetfabrik Schramberg & Co GmbH filed Critical Magnetfabrik Schramberg & Co GmbH
Publication of EP0860014A1 publication Critical patent/EP0860014A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • 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

Definitions

  • the invention relates to a magnetic material and a permanent magnet of the NdFeB type.
  • NdFeB materials can only be used today if the ambient conditions are not critical (room temperature, air humidity up to 50%, no condensation, see Vacuumschmelze GmbH product description PD-002, 04/95, p.32 ff).
  • the additional step of the polymeric or metallic coating causes additional costs and risks due to detachments, which can lead to failure.
  • the aim of the invention is to develop a corrosion-resistant magnetic material based on NdFeB materials for applications from room temperature to above 200 ° C. with good absolute magnetic properties at low temperatures and superior magnetic properties at higher temperatures.
  • the claimed materials or permanent magnets have coefficients of approx. -0.08% / K up to a room temperature of 100 ° C or -0.085% / K up to a room temperature of 150 ° C. This enables comparatively excellent flow values to be achieved at temperatures above 100 ° C.
  • the lower temperature coefficients result in a clear advantage since the temperature influence is lower and the system design is simpler.
  • the thumb magnet can be used in a damp environment without further protective measures.
  • the material can be coated using conventional and easy-to-implement methods without running the risk of the coating becoming detached under the influence of temperature and moisture.
  • TM 17 materials served as a benchmark in durability and high-temperature properties, but can only be used to a limited extent due to more expensive raw materials and more expensive manufacturing parameters.
  • the new material has comparable good corrosion resistance to Sm2 (TM) 17 materials. Its magnetic properties (magnetic flux) are higher than the Sm2 (TM) 17 materials at temperatures up to approx. 200 ° C. It is cheaper to manufacture. Compared to conventional NdFeB materials, its corrosion resistance is improved many times over. In the pressure cooker test (130 ° C, 3 bar, saturated water vapor), only slight material losses of an average of about 0.1 mg per cm 2 and day occur and continue to decrease, while the material loss occurs with commercially available ones Permanent magnets of the NdFeB type are in the range from 10 to 100 mg per cm 2 and day (factor 100 to 1000!).
  • the high corrosion resistance means that an additional coating is not required for standard applications. If protective layers are nevertheless required for application-technical reasons, the new material is characterized by a high level of insensitivity to that of, for example, galvanic Coating contacting media. As a result, these coatings become unproblematic and can be carried out in conventional galvanic plants as standard without special technological measures.
  • the applied coatings have a high stability against thermal stress and moisture.
  • the materials described can be produced in standard manufacturing plants in the magnet industry.
  • the process parameters differ only slightly from those of the previously known NdFeB materials.
  • compositions in parts by weight are:
  • test In the pressure cooker test (130 ° C, 3bar, saturated water vapor), the samples were tested in 10 steps for 24 h each. The corrosion products that occurred were then removed mechanically and the magnet weighed. The test size is the weight loss per surface per day.
  • Fig. 3 shows the demagnetization curves of this alloy. These are curves at 25, 50, 100 and 150 ° C.
  • the measured values and test parameters are as follows.
  • Nb can be replaced in whole or in part by other refractory metals such as Mo, V, Cr, Ta etc.
  • AI can be partially or completely replaced by Ga or Bi.
  • Cu can be replaced in whole or in part by Ag or Au.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

L'invention concerne un matériau magnétique et un aimant permanent de type NdFeB. On obtient une protection contre la corrosion intrinsèque et propre à la structure, par adjonction ciblée d'additifs tels que Dy, Co, Nb, Al, Ga et Cu à l'alliage de base de NbFeB. Pour des applications standard, un revêtement supplémentaire n'est pas nécessaire. Comparativement aux autres matériaux utilisés, ce matériau est moins sensible aux substances de contact intervenant pendant une opération de revêtement par galvanoplastie. De meilleurs coefficients de température de la rémanence et, avec un choix judicieux de l'alliage, des intensités de champ coercitif élevées, même à température élevée, permettent d'utiliser ledit matériau à des températures supérieures à 200 °C. Des densités de flux magnétique élevées dans un domaine de températures allant jusqu'à 200 °C permettent d'utiliser les matériaux Sm2(TN)17, certes éprouvés, mais néanmoins plus coûteux, dans une pluralité d'applications.
EP96938104A 1995-11-10 1996-11-06 MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB Ceased EP0860014A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19541948 1995-11-10
DE1995141948 DE19541948A1 (de) 1995-11-10 1995-11-10 Magnetmaterial und Dauermagnet des NdFeB-Typs
PCT/EP1996/004836 WO1997017709A1 (fr) 1995-11-10 1996-11-06 MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB

Publications (1)

Publication Number Publication Date
EP0860014A1 true EP0860014A1 (fr) 1998-08-26

Family

ID=7777137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96938104A Ceased EP0860014A1 (fr) 1995-11-10 1996-11-06 MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB

Country Status (3)

Country Link
EP (1) EP0860014A1 (fr)
DE (1) DE19541948A1 (fr)
WO (1) WO1997017709A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945942C2 (de) * 1999-09-24 2003-07-17 Vacuumschmelze Gmbh Verfahren zur Herstellung von Dauermagneten aus einer borarmen Nd-Fe-B-Legierung
CN100461308C (zh) * 2005-05-22 2009-02-11 横店集团东磁有限公司 一种超高矫顽力烧结钕铁硼磁性材料及其制备方法
CN110428947B (zh) * 2019-07-31 2020-09-29 厦门钨业股份有限公司 一种稀土永磁材料及其原料组合物、制备方法和应用
CN110517838A (zh) * 2019-08-16 2019-11-29 厦门钨业股份有限公司 一种钕铁硼永磁材料及其原料组合物、制备方法和应用

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247454A (ja) * 1985-08-23 1987-03-02 Toshiba Corp 永久磁石合金
JPS62213102A (ja) * 1986-03-13 1987-09-19 Shin Etsu Chem Co Ltd 希土類永久磁石の製造方法
US5230751A (en) * 1986-07-23 1993-07-27 Hitachi Metals, Ltd. Permanent magnet with good thermal stability
DE3750661T2 (de) * 1986-07-23 1995-04-06 Hitachi Metals Ltd Dauermagnet mit guter thermischer Stabilität.
JPS63119205A (ja) * 1986-11-06 1988-05-23 Shin Etsu Chem Co Ltd 焼結永久磁石
EP0302947B1 (fr) * 1987-03-02 1994-06-08 Seiko Epson Corporation Aimant a base de fer-elements de terres rares et procede de production
JPS63272009A (ja) * 1987-04-30 1988-11-09 Daido Steel Co Ltd 希土類−Ｆｅ−Ｂ系磁石の製造方法
US5015307A (en) * 1987-10-08 1991-05-14 Kawasaki Steel Corporation Corrosion resistant rare earth metal magnet
JP2520450B2 (ja) * 1988-06-02 1996-07-31 信越化学工業株式会社 耐食性希土類磁石の製造方法
US5200001A (en) * 1989-12-01 1993-04-06 Sumitomo Special Metals Co., Ltd. Permanent magnet
FR2655355B1 (fr) * 1989-12-01 1993-06-18 Aimants Ugimag Sa Alliage pour aimant permanent type fe nd b, aimant permanent fritte et procede d'obtention.
US5162064A (en) * 1990-04-10 1992-11-10 Crucible Materials Corporation Permanent magnet having improved corrosion resistance and method for producing the same
DE4015683C2 (de) * 1990-05-16 1994-01-13 Schramberg Magnetfab Verfahren zum Herstellen von hoch- oder niederkoerzitiven Permanentmagneten
GB9022033D0 (en) * 1990-10-10 1990-11-21 Lee Victor C A method of making a material with permanent magnetic properties
DE69202515T2 (de) * 1991-06-04 1995-09-21 Shinetsu Chemical Co Verfahren zur Herstellung von zweiphasigen Dauermagneten auf der Basis von Seltenen Erden.
DE4135403C2 (de) * 1991-10-26 1994-06-16 Vacuumschmelze Gmbh SE-Fe-B-Dauermagnet und Verfahren zu seiner Herstellung
CN1053988C (zh) * 1991-11-11 2000-06-28 住友特殊金属株式会社 稀土磁体和稀土磁体用的合金粉末及其制造方法
DE4331563A1 (de) * 1992-09-18 1994-03-24 Hitachi Metals Ltd Nd-Fe-B-Sintermagnete
US5482575A (en) * 1992-12-08 1996-01-09 Ugimag Sa Fe-Re-B type magnetic powder, sintered magnets and preparation method thereof
US5472525A (en) * 1993-01-29 1995-12-05 Hitachi Metals, Ltd. Nd-Fe-B system permanent magnet
JP3298219B2 (ja) * 1993-03-17 2002-07-02 日立金属株式会社 希土類―Ｆｅ−Ｃｏ−Ａｌ−Ｖ−Ｇａ−Ｂ系焼結磁石
JPH0794311A (ja) * 1993-09-21 1995-04-07 Hitachi Metals Ltd Ｎｄ−Ｆｅ−Ｃｏ−Ｂ型焼結磁石
US5480471A (en) * 1994-04-29 1996-01-02 Crucible Materials Corporation Re-Fe-B magnets and manufacturing method for the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9717709A1 *

Also Published As

Publication number Publication date
DE19541948A1 (de) 1997-05-15
WO1997017709A1 (fr) 1997-05-15

Similar Documents

Publication Publication Date Title
DE69909569T2 (de) Korrosionsbeständiger dauermagnet und verfahren zu seiner herstellung
DE3879195T2 (de) Weichmagnetischer rostfreier stahl mit guter kaltschmiedbarkeit.
DE69219936T2 (de) Magnetowiderstandseffekt-Element
DE3035433C2 (de) Verwendung einer glasartigen Legierung
DE4402783B4 (de) Nd-Fe-B-System-Dauermagnet
EP2416329B1 (fr) Noyau magnétique pour des applications basse fréquence et procédé de fabrication d'un noyau magnétique pour des applications basse fréquence
DE68905987T2 (de) Korrosionsfester dauermagnet und herstellungsverfahren.
DE112018008152T5 (de) Seltenerdmagnet, Seltenerd-Sputtermagnet, Seltenerddiffusionsmagnet und Verfahren zur Herstellung
DE3935698A1 (de) Legierungsscheibe, verwendbar zur herstellung eines magneto-optischen aufzeichnungsmediums
DE69630283T2 (de) Dauermagnet für ultra-hoch-vakuum anwendung und herstellung desselben
DE68926768T2 (de) Supermagnetostriktive Legierung
DE102017222062A1 (de) Permanentmagnet auf R-T-B-Basis
WO2009013711A2 (fr) Procédé de production de noyaux magnétiques
DE3624969C2 (de) Verwendung eines rostfreien weichmagnetischen Stahls
DE60029364T2 (de) Automatenlegierung
DE19945942A1 (de) Borarme Nd-Fe-B-Legierung und Verfahren zur Herstellung von Dauermagneten aus dieser Legierung
DE69503957T3 (de) SE-Fe-B Magneten und ihrer Herstellungsverfahren
EP0860014A1 (fr) MATERIAU MAGNETIQUE ET AIMANT PERMANENT DE TYPE NdFeB
DE102014105778B4 (de) R-t-b-basierter permanentmagnet
DE69014049T2 (de) Magnetostriktive Kobalt-Eisenlegierungen und ihre Produktanwendungen.
DE3841748C2 (fr)
EP0396880A1 (fr) Aimant de NdFeB et procédé de passivation de surface d'aimants de NdFeB
DE2747703B2 (de) Ferromagnetisches Filmmaterial und Verfahren zu seiner Herstellung
DE69733926T2 (de) Magnetostriktives Verbundmaterial und Verfahren zu dessen Herstellung
DE29521549U1 (de) Magnetmaterial und Dauermagnet des NdFeB-typs

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 19980610

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FI FR GB IT LI NL PT SE

17Q First examination report despatched

Effective date: 19991130

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20010518