WO1995035176A1 - Method for the manufacture of a magnetostrictive material - Google Patents

Method for the manufacture of a magnetostrictive material Download PDF

Info

Publication number
WO1995035176A1
WO1995035176A1 PCT/FI1995/000363 FI9500363W WO9535176A1 WO 1995035176 A1 WO1995035176 A1 WO 1995035176A1 FI 9500363 W FI9500363 W FI 9500363W WO 9535176 A1 WO9535176 A1 WO 9535176A1
Authority
WO
WIPO (PCT)
Prior art keywords
manufacture
compounds
rare earth
materials
blended
Prior art date
Application number
PCT/FI1995/000363
Other languages
French (fr)
Inventor
Pekka Ruuskanen
Original Assignee
Valtion Teknillinen Tutkimuskeskus
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 Valtion Teknillinen Tutkimuskeskus filed Critical Valtion Teknillinen Tutkimuskeskus
Priority to AU27410/95A priority Critical patent/AU2741095A/en
Publication of WO1995035176A1 publication Critical patent/WO1995035176A1/en

Links

Classifications

    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0306—Metals or alloys, e.g. LAVES phase alloys of the MgCu2-type
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • 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
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N35/00—Magnetostrictive devices
    • H10N35/80—Constructional details
    • H10N35/85—Magnetostrictive active materials

Definitions

  • the present invention relates to a method for the manufacture of a magnetostrictive material .
  • Magnetostrictive materials which are based on compounds of transition metals and rare earth met ⁇ als, are traditionally produced by vacuum casting. With these materials, a high magnetostrictivity value of about 2000 ppm is achieved. They are used in indus- try e.g. as various types of actuators, vibration dampers, pumps, in hydraulic valves etc.
  • the object of the present invention is to eliminate the drawbacks mentioned above.
  • a specific object of the invention is to present a new method for the manufacture of magnetostrictive materials, which method enables large-scale use of magnetostrictive ma ⁇ terials in various applications in different branches of industry.
  • compounds of transition " metals and rare earth metals are produced via mechanical blending.
  • Mechanical blending is pref ⁇ erably implemented using a high-energy ball mill. In this way, compounds or mixtures having a high magne ⁇ tostrictivity value are formed between the transition etals and earth metals during the process.
  • Preferable starting materials used in the method are iron, cobalt and/or nickel as well as rare earth metals.
  • the starting materials may also consist of various pre-blended compounds, such as Fe 2 Tb and Fe.Dy.
  • various other elements can be blended with the basic materials during the milling or equivalent mechanical blending process to reinforce the structure.
  • Such ele- ments may be e.g. copper or niobe.
  • a powder is produced which can be used directly as such in differ ⁇ ent applications or it can be solidified e.g. via a cold or hot pressing process.
  • the method of the invention for the manufac ⁇ ture of magnetostrictive materials, mechanical blend ⁇ ing, which is a solid state synthesizing method, has significant advantages as compared with known technol ⁇ ogy: - the equipment needed for the method is simple and. cheap,
  • the basic materials can be blended with elements which reinforce the structure and increase its stiff ⁇ ness
  • - the magnitude of the magnetostrictivity value can be influenced via blending, because in mechanical blend ⁇ ing the solubility values are higher than in the cast ⁇ ing technique

Abstract

Method for the manufacture of a magnetostrictive material, in which method compounds between transition metals and rare earth metals are produced via mechanical blending.

Description

METHOD FOR THE MANUFACTURE OF A MAGNETOSTRICTIVE MATE¬ RIAL
The present invention relates to a method for the manufacture of a magnetostrictive material . Magnetostrictive materials, which are based on compounds of transition metals and rare earth met¬ als, are traditionally produced by vacuum casting. With these materials, a high magnetostrictivity value of about 2000 ppm is achieved. They are used in indus- try e.g. as various types of actuators, vibration dampers, pumps, in hydraulic valves etc.
Interest in the manufacture of these materi¬ als has grown rapidly during the last few years. The drawbacks of these materials include their brittle- ness, high manufacturing costs and the fact that they are very difficult to machine. These drawbacks are a hindrance to industrial application of materials with a high magnetostrictivity.
The object of the present invention is to eliminate the drawbacks mentioned above. A specific object of the invention is to present a new method for the manufacture of magnetostrictive materials, which method enables large-scale use of magnetostrictive ma¬ terials in various applications in different branches of industry.
As for the features characteristic of the in¬ vention, reference is made to the claims.
In the method of the invention for the manu¬ facture of a magnetostrictive material, compounds of transition "metals and rare earth metals are produced via mechanical blending. Mechanical blending is pref¬ erably implemented using a high-energy ball mill. In this way, compounds or mixtures having a high magne¬ tostrictivity value are formed between the transition etals and earth metals during the process. Preferable starting materials used in the method are iron, cobalt and/or nickel as well as rare earth metals.
The starting materials may also consist of various pre-blended compounds, such as Fe2Tb and Fe.Dy.
In a preferred embodiment of the invention, various other elements can be blended with the basic materials during the milling or equivalent mechanical blending process to reinforce the structure. Such ele- ments may be e.g. copper or niobe.
With the method of the invention, a powder is produced which can be used directly as such in differ¬ ent applications or it can be solidified e.g. via a cold or hot pressing process. The method of the invention for the manufac¬ ture of magnetostrictive materials, mechanical blend¬ ing, which is a solid state synthesizing method, has significant advantages as compared with known technol¬ ogy: - the equipment needed for the method is simple and. cheap,
- the basic materials can be blended with elements which reinforce the structure and increase its stiff¬ ness, - the magnitude of the magnetostrictivity value can be influenced via blending, because in mechanical blend¬ ing the solubility values are higher than in the cast¬ ing technique,
- the method makes it possible to produce complex and variform bodies, and
- the materials are easier to machine than at present.

Claims

1. Method for the manufacture of a magne¬ tostrictive material, c h a r a c t e r i z e d in that compounds between transition metals and rare earth metals are produced via mechanical blending.
2. Method as defined in claim 1, ch a r a c t e r i z e d in that mechanical blending is effected in a high-energy ball mill.
3. Method as defined in claim 1 or 2, c h a r a c t e r i z e d in that the starting materi¬ als used are are iron (Fe) , cobalt (Co) and/or nickel (Ni) as well as rare earth metals.
4. Method as defined in any one of claims 1 -
3, c h a r a c t e r i z e d in that the starting ma- terials used are pre- blended compounds, such as Fe2Tb and Fe2Dy.
5. Method as defined in any one of claims 1 -
4, c h a r a c t e r i z e d in that, during the me¬ chanical blending process, auxiliary materials are blended with the basic materials to reinforce the structure.
6. Method as defined in claim 5, c h a r a c t e r i z e d in that the auxliary mate¬ rial used is copper (Cu) or niobe (Nb) .
7. Method as defined in any one of claims 1 -
6, c h a r a c t e r i z e d in that the magnetostric¬ tive material is used as such in the form of a powder or solidified e.g. via a cold or hot pressing process.
PCT/FI1995/000363 1994-06-22 1995-06-21 Method for the manufacture of a magnetostrictive material WO1995035176A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27410/95A AU2741095A (en) 1994-06-22 1995-06-21 Method for the manufacture of a magnetostrictive material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI943032 1994-06-22
FI943032A FI943032A0 (en) 1994-06-22 1994-06-22 Foerfarande Foer framstaellning magnetostrictive material

Publications (1)

Publication Number Publication Date
WO1995035176A1 true WO1995035176A1 (en) 1995-12-28

Family

ID=8540986

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1995/000363 WO1995035176A1 (en) 1994-06-22 1995-06-21 Method for the manufacture of a magnetostrictive material

Country Status (3)

Country Link
AU (1) AU2741095A (en)
FI (1) FI943032A0 (en)
WO (1) WO1995035176A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644310A (en) * 1984-03-22 1987-02-17 Allied Corporation Actuator system having magnetomechanical cantilever beam formed of ferromagnetic amorphous material
DE3709138A1 (en) * 1987-03-20 1988-09-29 Siemens Ag Process for producing a magnetic material from pulverulent starting components
WO1989004226A1 (en) * 1987-11-03 1989-05-18 Allied-Signal Inc. A method of preparing a bulk amorphous metal article
WO1992000612A1 (en) * 1990-06-26 1992-01-09 Thomson-Csf Method for producing a magnetostrictive element
EP0468317A2 (en) * 1990-07-25 1992-01-29 Siemens Aktiengesellschaft Method for the preparation of magnetic material based an the Sm-Fe-N substance system
WO1992020829A1 (en) * 1991-05-22 1992-11-26 Proengco Ab Magnetostrictive powder composite and methods for the manufacture thereof
WO1992022913A1 (en) * 1991-06-19 1992-12-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Amorphous rare earth-iron materials
US5357232A (en) * 1991-12-12 1994-10-18 Tdk Corporation Magnetostrictive element

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644310A (en) * 1984-03-22 1987-02-17 Allied Corporation Actuator system having magnetomechanical cantilever beam formed of ferromagnetic amorphous material
DE3709138A1 (en) * 1987-03-20 1988-09-29 Siemens Ag Process for producing a magnetic material from pulverulent starting components
WO1989004226A1 (en) * 1987-11-03 1989-05-18 Allied-Signal Inc. A method of preparing a bulk amorphous metal article
WO1992000612A1 (en) * 1990-06-26 1992-01-09 Thomson-Csf Method for producing a magnetostrictive element
EP0468317A2 (en) * 1990-07-25 1992-01-29 Siemens Aktiengesellschaft Method for the preparation of magnetic material based an the Sm-Fe-N substance system
WO1992020829A1 (en) * 1991-05-22 1992-11-26 Proengco Ab Magnetostrictive powder composite and methods for the manufacture thereof
WO1992022913A1 (en) * 1991-06-19 1992-12-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Amorphous rare earth-iron materials
US5357232A (en) * 1991-12-12 1994-10-18 Tdk Corporation Magnetostrictive element

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 13, No. 33, M-789; & JP,A,63 243 203 (MITSUI MIIKE KAKOKI K.K.), 11 October 1988. *
PATENT ABSTRACTS OF JAPAN, Vol. 14, No. 348, E-957; & JP,A,02 121 376 (TOKIN CORP), 9 May 1990. *

Also Published As

Publication number Publication date
AU2741095A (en) 1996-01-15
FI943032A0 (en) 1994-06-22

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