WO1998018141A1 - Aimant en feuille presentant une structure microcristalline, son procede de fabrication et procede de fabrication d'une poudre magnetique permanente isotrope - Google Patents
Aimant en feuille presentant une structure microcristalline, son procede de fabrication et procede de fabrication d'une poudre magnetique permanente isotrope Download PDFInfo
- Publication number
- WO1998018141A1 WO1998018141A1 PCT/JP1997/003725 JP9703725W WO9818141A1 WO 1998018141 A1 WO1998018141 A1 WO 1998018141A1 JP 9703725 W JP9703725 W JP 9703725W WO 9818141 A1 WO9818141 A1 WO 9818141A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crystal structure
- magnet
- roll
- thickness
- less
- Prior art date
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
- H01F1/032—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
-
- 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
- H01F1/0579—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B with exchange spin coupling between hard and soft nanophases, e.g. nanocomposite spring magnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- 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
Definitions
- the present invention relates to a thin sheet magnet having a fine crystal structure, a method for producing the same, and a method for producing an isotropic permanent magnet powder.
- the present invention relates to a thin plate magnet that is optimal for various small motors, actuators, magnetic circuits for magnetic sensors, and the like, and a method of manufacturing the same.
- the present invention relates to a method of manufacturing a rare earth element of 5 at% or less and boron of 15 at% to 30 at%>.
- the molten metal of the specified composition is poured onto a rotating chill roll in a specified reduced-pressure inert gas atmosphere, and a thin plate-shaped alloy with a thickness of 70 ⁇ ⁇ 300 ⁇ is continuously formed to directly 90% or more has a crystal structure in which a FeB-type compound and a compound phase having ⁇ -Fe and a Nd 2 Fe 14 B-type crystal structure coexist, and a fine crystal structure in which each constituent phase has an average crystal grain size of 10 nm to 50 nm. None, It relates to a thin plate magnet that can obtain magnetic properties of iHc ⁇ 2kOe, Br ⁇ OkG and a method of manufacturing the same. Zhang Jing: Technology
- Nd-Fe-B sintered magnets and Nd-Fe-B bond magnets with Nd 2 Fei 4 B as the main phase satisfy such magnetic properties, but have a great deal of effect on metal separation and purification and reduction reactions. Since it contains 10 at% to 15 at% of Nd, which requires processes and large-scale equipment, it is significantly more expensive than hard ferrite magnets, and hard ferrite is required in terms of performance-price ratio. Replacement of light magnets is only progressing for some models, and at present, no inexpensive permanent magnet material with Br of 5 kG or more has been found.
- Nd-Fe-B sintered magnets are difficult to obtain bulk materials of 500 ⁇ or less, so they can only be manufactured by grinding, which causes a rise in price.
- the Nd-Fe-B bonded magnet has a thickness of 30 ⁇ and a diameter of ⁇ ! It is difficult to form a magnet having a thickness of 100 ⁇ to 300 ⁇ , since it is obtained by bonding powder of up to 500 ⁇ with a resin.
- Such a permanent magnet material has Br of about 10 kG and iHc of 2 kOe to 3 kOe, and the content of expensive Nd is as low as about 4 at% .
- the compounding material price is mainly Nd 2 Fe 14 B.
- the conditions for liquid quenching are limited because amorphous alloying of the blended material is an essential condition, and the heat treatment conditions for becoming a hard magnetic material are narrowly limited. Because it is not practical for industrial production, hard ferrite There was a problem that it could not be provided inexpensively as a substitute for a magnet.
- such a permanent magnet material is obtained by subjecting an amorphous flake having a thickness of 20 ⁇ to 60 ⁇ to a crystallization heat treatment, 70 ⁇ ! A permanent magnet with a thickness of ⁇ 300 ⁇ cannot be obtained.
- the present invention solves the above-mentioned problem in an Nd-Fe-B-based magnet having a fine crystal structure containing 5 at% or less of a rare earth element, has a residual magnetic flux density of 10 kG or more, and is comparable to a hard ferrite magnet.
- An object of the present invention is to provide a thin plate magnet having a fine crystal structure with a thickness of 100 ⁇ to 300 ⁇ , which has a performance-to-price ratio and contributes to a reduction in the size and thickness of a magnet circuit, and a method of manufacturing the same.
- the present inventors have conducted various studies with the aim of making Nd-Fe-B permanent magnets with a low rare earth concentration, in which a soft magnetic phase and a hard magnetic phase are mixed, into thin plate magnets.
- a soft magnetic phase and a hard magnetic phase are mixed, into thin plate magnets.
- a continuous thin-sheet magnet of ⁇ 300 ⁇ can be directly obtained, and if the average crystal grain size of each phase constituting the obtained continuous forged alloy is 10nm ⁇ 50nm, iHc 2kOe and Br 10kG magnetic properties are obtained.
- Reko In addition, if a crystalline metal structure having an average crystal grain size of less than 10 nm is obtained, a specific heat treatment for grain growth is performed, so that the average crystal grain size of each constituent phase is reduced.
- the present invention was completed by finding that magnetic characteristics of iHc 2 kOe and Br ⁇ 10 kG could be obtained with the range of 10 nm to 50 nm.
- the present invention is a composition formula Fe 100-x- yB x R y (wherein R represents Pr, and one or opposition of Nd or Dy, the symbols x limiting the composition range, y is satisfy the following values and, Fe 3 B type compound and alpha-Fe and Nd 2 Fe 14 B compound phase having a crystal structure that coexist crystal structure accounts for 90% or more, Ri Do from the average microcrystal grain size 10nm ⁇ 50nm It is a sheet magnet having a fine crystal structure with a thickness of 70 ⁇ to 300 ⁇ and magnetic properties of iHc ⁇ 2 kOe and Br ⁇ 10 kG.
- the composition formula is represented by Fei 00-x- yB x Ry (where R is one or two of Pr, Nd or Dy), and the symbols x and y that limit the composition range satisfy the above values.
- the molten metal is injected at a specific roll peripheral speed on a rotating cooling single roll or between twin rolls in a reduced pressure inert gas atmosphere of 30 kPa or less, and directly into the Fe 3 B-type compound and a-Fe and Nd 2
- the crystal structure in which the compound phase having the Fe 14 B type crystal structure coexists accounts for 90% or more, is composed of fine crystals with an average crystal grain size of 50 nm or less, has a thickness of 70 ⁇ to 300 ⁇ , has magnetic properties of iHc ⁇ 2 kOe, This is a method for producing a thin plate magnet having a fine crystal structure to obtain a permanent magnet with Br ⁇ 10 kG.
- the present invention in the above-mentioned production method, after forming the molten alloy into fine crystals having an average crystal grain size of 10 nm or less and forming a rapidly quenched alloy having a thickness of 70 ⁇ to 300 ⁇ , a temperature of 500 ° C. to 700 ° C. Heat treatment for the purpose of crystal grain growth in the region, forming a fine crystal alloy with an average crystal grain size of 10 nm to 50 nm, magnetic properties of iHc 2 kOe,
- a method for manufacturing a thin-plate magnet with a fine crystal structure to obtain a permanent magnet with Br ⁇ 10 kG.
- the present inventors performed punching on a thin sheet magnet of a permanent magnet having a magnetic property of iHc ⁇ 2 kOe and Br ⁇ OkG having a thickness of 70 ⁇ to 300 ⁇ , thereby forming a predetermined shape.
- the inventors made the remaining thin sheet magnet after punching out the thin sheet magnet of the above-mentioned predetermined shape by pulverizing so that the average powder particle size becomes 3 ⁇ to 500 ⁇ , iHc ⁇ 2 kOe, Br
- FIG. 1 is a graph showing the characteristic X-ray diffraction pattern of Cu- ⁇ of the sample in the example.
- High magnetic properties can be obtained only when the rare earth element R contains one or two kinds of Pr, Nd or Dy, and other rare earth elements such as Ce and La have iHc of 2 kOe or more. Also, medium rare earth elements and heavy rare earth elements after Sm excluding Tb and Dy are not preferable because they cause deterioration of magnetic properties and increase the cost of magnets.
- R is less than lat%, iHc of 2 kOe or more cannot be obtained, and if it exceeds 5 at%, Br of 10 kG or more cannot be obtained, so the R is in the range of lat% to 5 at%. More preferably, 2 at% to 5 at% is good.
- B is less than 15 at%, precipitation of ⁇ -Fe is remarkable in the metal structure after liquid quenching, and precipitation of the compound having the Nd 2 Fe 14 B type crystal structure, which is essential for the development of coercive force, is inhibited.
- Fe occupies the residual content of the above-mentioned elements, and by substituting part of Fe with Co, the metal structure is refined, the squareness of the demagnetization curve is improved, and the maximum energy product (BH) max is reduced.
- the amount of substitution for Fe is less than 0.1%, such an effect cannot be obtained, and if it exceeds 50%, Br of 10 kG cannot be obtained.
- the range is 0.1% to 50%. Preferably, it is 0.5% to 10%.
- substitution of 0.1 to 7 at% of Cr improves iHc, and the total is 0.05 at% to 2 at% ⁇ Al, Si, S, Ni, Cu, Zn, Ga, Ag, Pt, Au, Substitution with one or two types of Pb improves the squareness of the demagnetization curve and has the effect of increasing Br and (BH) max.
- the molten alloy having the above-mentioned specific composition is substantially injected into the rotating single roll or between the twin rolls at a specific roll peripheral speed in a reduced pressure inert gas atmosphere of 30 kPa or less.
- 90% or more of Fe 3 B type compound, and the thickness of the crystal structure where ⁇ -Fe and the compound phase having Nd 2 Fe 14 B type crystal structure coexist are 70 ⁇ !
- a thin-sheet magnet with a continuous forged alloy of ⁇ 300 ⁇ and a fine crystal structure of 10nm ⁇ 50nm required for obtaining magnetic properties of iHc ⁇ 2kOe, Br ⁇ 10kG with the average crystal grain size of each constituent phase Most importantly.
- the pressure of the atmosphere during continuous production of the molten alloy is a feature of the present invention.
- the reason for the limitation is that when the production atmosphere is 30 kPa or more, gas enters between the cooling roll and the molten alloy, and the quenched alloy is rapidly cooled. Since the uniformity of the conditions is lost, a coarse metal structure containing ⁇ -Fe is formed, and the magnetic characteristics of iHc 2 kOe and Br 10 kG cannot be obtained.
- it is 10 kPa or less.
- the atmosphere gas is an inert gas to prevent oxidation of the molten alloy.
- ⁇ Ar is good.
- the average grain size of the alloy produced by the above-described continuous casting method is iHc 2kOe, the average grain size required to obtain Br ⁇ 10kG magnetic properties ⁇ ! If it is less than 50 nm, heat treatment for grain growth may be performed. If the heat treatment temperature is less than 500 ° C, no grain growth occurs, so that an average crystal grain size of 10 nm or more cannot be obtained. The heat treatment temperature is limited to 500 ° C to 700 ° C because of deterioration and the above-mentioned magnetic characteristics cannot be obtained. The heat treatment temperature at which the magnetic properties are maximized depends on the composition.
- the atmosphere is preferably an inert gas atmosphere such as Ar gas or N 2 gas or a vacuum of 1.33 Pa or less to prevent oxidation.
- the magnetic properties do not depend on the heat treatment time, but if it exceeds 6 hours, Br tends to decrease with the passage of time, so that it is preferably less than 6 hours.
- the manufacturing conditions are limited to a 70 ⁇ ⁇ ⁇ thick alloy.
- Aluminum alloy, Cu, Fe, brass, W, and bronze can be used for the material of the cooling port used in the continuous manufacturing process from the viewpoint of thermal conductivity.
- Cu or Fe (However, an alloy containing Cu or Fe may be used). Materials other than the above have poor heat conduction, so the molten alloy cannot be cooled sufficiently, and several lOOnm Coarse ⁇ -Fe and Fe 2 B precipitate, which is not preferable because magnetic properties of iHc ⁇ 2 kOe and Br 10 kG cannot be obtained.
- the roll speed of the roll exceeds 10 m / s
- the crystal structure contained in the forged alloy having a thickness of 70 ⁇ or less decreases and the amorphous phase increases when the roll speed exceeds 10 m / s. I do.
- the roll peripheral speed is 2 m / s or less
- coarse ⁇ -Fe and Fe 2 B of several lOOnm precipitate as a result of the thickness of the forged alloy exceeding 300 ⁇ , and the magnetic properties of iHc ⁇ 2kOe and Br It is not preferable because it cannot be obtained.
- the peripheral speed of the Cu roll is limited to 2 m / sec to 10 m / sec.
- the wettability of the molten alloy and the cooling roll is better than that of the Cu roll, so that
- the peripheral speed exceeds 7 m / s, the thickness of the forged alloy falls to 70 ⁇ or less, the crystal structure contained in the forged alloy decreases, and the amorphous phase increases, so that the magnetic properties of iHc 2kOe and Br 10kG Not obtained, not preferred. Therefore, in the case of Fe roll, the roll peripheral speed is limited to 2m / sec to 7m / sec. Preferably, it is 2.5 m / sec to 5.5 m / sec.
- the distance between the two rolls is less than 0.005 mm. If the thickness is less than 0.005 mm, the molten metal overflows from between the rolls, so that it is not preferable because the structure cannot be continued. Therefore, the distance between the two rolls
- 0.05 mm to 0.2 mm is good.
- the peripheral speed of the two Fe rolls exceeds 8 m / s, the crystal structure contained in the forged alloy decreases and the amorphous phase increases. If the roll peripheral speed is less than m / s, a few lOOnm of a-Fe and Fe2B are precipitated, so iHc 2kOe, Br ⁇ 10kG Cannot be obtained, which is not preferable. Therefore, the peripheral speed of the mouth is limited to lm / sec to 8m / sec. It is preferably 1.5 m / sec to 5 m / sec.
- a method of processing a continuous thin sheet magnet obtained by the continuous forming process into a predetermined shape a method of processing a thin sheet metal material generally manufactured by rolling, etching, ultrasonic processing, or the like is used. Punching with ultrasonic waves is preferable because it can be processed into a predetermined shape without causing cracks in the thin plate magnet.
- the remaining thin sheet magnet generated by punching or the like can be reused as an isotropic permanent magnet magnetic powder having iHc ⁇ 2 kOe and Br ⁇ 7 kG by grinding.
- the pulverized particle size is preferably 20 ⁇ to 300 ⁇ when used as a magnetic powder for a compression-molded bonded magnet, and is preferably 50 ⁇ or less as a magnetic powder for an injection-molded bonded magnet.
- the crystal phase of the thin plate magnet according to the present invention is such that the Fe 3 B-type compound and ⁇ -Fe having soft magnetism and the soft magnetic compound phase having the Nd 2 Fe 14 B-type crystal structure coexist in the same structure. It is characterized by comprising a fine crystal aggregate having an average crystal grain size of the constituent phases in the range of 10 nm to 50 nm. If the average crystal grain size of the thin sheet magnet exceeds 50 nm, the squareness of Br and demagnetization curve deteriorates, and it is not possible to obtain magnetic properties of Br ⁇ 10 kG.
- the average crystal grain size is preferably as small as possible. However, if it is less than 10 nm, iHc is reduced. Therefore, the lower limit is set to lOnm.
- Fig. 1 shows the X-ray diffraction pattern of Example No. 2 using the characteristic X-rays of CuKa.
- the obtained thin plate magnets have Fe 3 B-type compounds and a-Fe and Fe 14 B-type crystal structures. It was confirmed that the compound phase had a coexisting metal structure.
- the crystal grain size all the samples except for the samples of No. 4, No. 16, and No. 17 had a fine crystal structure with an average crystal particle size of 10 nm to 50 nm.
- the magnetic properties of the obtained thin plate magnet were measured by a VSM using a ultrasonic machine, and a thin plate magnet having a predetermined shape punched out into a disk shape having a diameter of 5 mm.
- Table 2 shows the magnet characteristics.
- the average crystal grain size was less than lOnm, so the thin plate magnet was kept in Ar gas at 600 ° C for 10 minutes, and the average crystal grain size was Was heat-treated so as to be not less than lOnm.
- the magnetic properties were measured by a VSM on a thin plate magnet formed in a predetermined shape in the same manner as in Example 1. Table 2 shows the measurement results.
- Al, Si, S, Ni, Cu, Co, Ni, Cr, Zn, Ga, Ag, Pt, Au, and Pb replace part of Fe in each constituent phase.
- Example 2 In the same manner as in Example 1, a continuous forged alloy was produced using Fe, B, and R having a purity of 99.5% or more under the forging conditions shown in Table 1 so that the compositions of ⁇ .18 to ⁇ .21 in Table 1 were obtained. did.
- Figure 1 shows the characteristic X-ray diffraction pattern of the obtained sample. X-ray diffraction pattern results
- the sample of No. 18 was an amorphous alloy with no coercive force.
- the sample of No. 19 had a metal structure in which the ⁇ -Fe phase was the main phase.
- the sample of No. 20 has a structure composed of Nd 2 Fe 23 B 3 and a-Fe, which are non-magnetic phases
- the sample of No. 21 has a-Fe as the main phase, as in ⁇ 19. Metal structure.
- Table 2 shows the magnet characteristics measured by No. 18 to No. 21 VSM.
- the present invention relates to a method in which a molten alloy having a specific composition having a low content of rare earth elements is rolled on a rotating single-cooling roll or in a gap between twin rolls in a reduced-pressure inert gas atmosphere of 30 kPa or less.
- the crystal structure in which the Fe 3 B-type compound and the compound phase having ⁇ -Fe and Nd 2 Fe 14 B-type crystal structure coexist is obtained by iHc ⁇
- a continuous thin-plate magnet with a thickness of 70 ⁇ to 300 ⁇ consisting of a fine crystal structure with an average crystal grain size of 10 nm to 50 nm and magnetic properties of 2 kOe and Br ⁇ 10 kG can be directly obtained, and the average crystal grain size is 10 nm.
- the average crystal grain size of each constituent phase becomes 10 nm to 50 nm by heat treatment for the purpose of specific grain growth, and iHc ⁇ 2 kOe and Br 10 kG magnetic characteristics.
- a thin-plate magnet with a thickness of 70 ⁇ to 300 ⁇ that could not be achieved and has a performance-to-price ratio comparable to that of a hard ferrite magnet and contributes to the miniaturization of magnetic circuits can be provided at low cost.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Nanotechnology (AREA)
- Composite Materials (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/284,604 US6168673B1 (en) | 1996-10-18 | 1997-10-16 | Sheet magnet having microcrystalline structure and method of manufacturing the same, and method of manufacturing isotropic permanent magnet powder |
DE69730250T DE69730250T2 (de) | 1996-10-18 | 1997-10-16 | Magnetfolie mit mikrokristallinen struktur, und herstellungsverfahren desselben, und herstellungsverfahren eines isotropen permanentmagnet-pulver |
EP97944129A EP1017065B1 (en) | 1996-10-18 | 1997-10-16 | Sheet magnet having microcrystalline structure and method of manufacturing the same, and method of manufacturing isotropic permanent magnet powder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8297176A JPH10125518A (ja) | 1996-10-18 | 1996-10-18 | 微細結晶組織を有する薄板磁石 |
JP8/297176 | 1996-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998018141A1 true WO1998018141A1 (fr) | 1998-04-30 |
Family
ID=17843169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/003725 WO1998018141A1 (fr) | 1996-10-18 | 1997-10-16 | Aimant en feuille presentant une structure microcristalline, son procede de fabrication et procede de fabrication d'une poudre magnetique permanente isotrope |
Country Status (7)
Country | Link |
---|---|
US (1) | US6168673B1 (ja) |
EP (1) | EP1017065B1 (ja) |
JP (1) | JPH10125518A (ja) |
KR (1) | KR100310647B1 (ja) |
CN (1) | CN1117382C (ja) |
DE (1) | DE69730250T2 (ja) |
WO (1) | WO1998018141A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1168380A1 (en) * | 1999-11-25 | 2002-01-02 | Seiko Epson Corporation | Thin strip magnet material, magnet powder and rare earth bond magnet |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1111879C (zh) * | 1997-02-06 | 2003-06-18 | 住友特殊金属株式会社 | 具有微晶结构的薄片磁体的制造方法 |
KR19990014500A (ko) * | 1998-11-17 | 1999-02-25 | 신영주 | 열교환기의 브레이징 장치 |
US6377049B1 (en) | 1999-02-12 | 2002-04-23 | General Electric Company | Residuum rare earth magnet |
JP2001332410A (ja) * | 2000-05-22 | 2001-11-30 | Seiko Epson Corp | 磁石粉末、磁石粉末の製造方法およびボンド磁石 |
JP2002057016A (ja) * | 2000-05-30 | 2002-02-22 | Seiko Epson Corp | 磁石材料の製造方法、薄帯状磁石材料、粉末状磁石材料およびボンド磁石 |
JP3654236B2 (ja) * | 2001-11-07 | 2005-06-02 | 株式会社日立製作所 | 電極デバイスの製造方法 |
JP5079498B2 (ja) * | 2004-04-28 | 2012-11-21 | ザ・ナノスティール・カンパニー・インコーポレーテッド | ナノ結晶金属シートの製造方法 |
ES2540206T3 (es) * | 2006-10-18 | 2015-07-09 | The Nanosteel Company, Inc. | Procedimiento de tratamiento mejorado para la producción de una chapa de acero amorfo nanométrico/casi nanométrico |
US8821650B2 (en) * | 2009-08-04 | 2014-09-02 | The Boeing Company | Mechanical improvement of rare earth permanent magnets |
JP6171662B2 (ja) * | 2013-07-23 | 2017-08-02 | Tdk株式会社 | 希土類磁石、電動機、及び電動機を備える装置 |
EP3785824B1 (en) * | 2018-04-27 | 2023-10-11 | Proterial, Ltd. | Fe-based nanocrystalline alloy powder and method for producing a magnetic core |
CN112201429B (zh) * | 2020-10-14 | 2021-12-21 | 燕山大学 | 一种纳米级梯度结构的永磁体及其制备方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07157804A (ja) * | 1993-12-06 | 1995-06-20 | Showa Denko Kk | 希土類永久磁石用合金粉末及びその製造法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4496395A (en) * | 1981-06-16 | 1985-01-29 | General Motors Corporation | High coercivity rare earth-iron magnets |
US5172751A (en) * | 1982-09-03 | 1992-12-22 | General Motors Corporation | High energy product rare earth-iron magnet alloys |
US5056585A (en) * | 1982-09-03 | 1991-10-15 | General Motors Corporation | High energy product rare earth-iron magnet alloys |
US5174362A (en) * | 1982-09-03 | 1992-12-29 | General Motors Corporation | High-energy product rare earth-iron magnet alloys |
JP2530641B2 (ja) * | 1986-03-20 | 1996-09-04 | 日立金属株式会社 | 磁気異方性ボンド磁石、それに用いる磁粉及びその製造方法 |
WO1988004098A1 (en) * | 1986-11-26 | 1988-06-02 | Tokin Corporation | A method for producing a rare earth metal-iron-boron anisotropic sintered magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
US4881986A (en) * | 1986-11-26 | 1989-11-21 | Tokin Corporation | Method for producing a rare earth metal-iron-boron anisotropic sintered magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
JPH04229602A (ja) | 1990-06-19 | 1992-08-19 | Kawasaki Steel Corp | 薄板状希土類−遷移金属系永久磁石の製造方法 |
JP3502107B2 (ja) * | 1991-08-29 | 2004-03-02 | Tdk株式会社 | 永久磁石材料の製造方法 |
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 |
JP3248942B2 (ja) * | 1992-03-24 | 2002-01-21 | ティーディーケイ株式会社 | 冷却ロール、永久磁石材料の製造方法、永久磁石材料および永久磁石材料粉末 |
-
1996
- 1996-10-18 JP JP8297176A patent/JPH10125518A/ja active Pending
-
1997
- 1997-10-16 EP EP97944129A patent/EP1017065B1/en not_active Expired - Lifetime
- 1997-10-16 WO PCT/JP1997/003725 patent/WO1998018141A1/ja active IP Right Grant
- 1997-10-16 DE DE69730250T patent/DE69730250T2/de not_active Expired - Lifetime
- 1997-10-16 US US09/284,604 patent/US6168673B1/en not_active Expired - Lifetime
- 1997-10-16 CN CN97199785A patent/CN1117382C/zh not_active Expired - Lifetime
-
1999
- 1999-04-17 KR KR1019997003391A patent/KR100310647B1/ko not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07157804A (ja) * | 1993-12-06 | 1995-06-20 | Showa Denko Kk | 希土類永久磁石用合金粉末及びその製造法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1168380A1 (en) * | 1999-11-25 | 2002-01-02 | Seiko Epson Corporation | Thin strip magnet material, magnet powder and rare earth bond magnet |
EP1168380A4 (en) * | 1999-11-25 | 2002-05-15 | Seiko Epson Corp | THIN BAND MAGNETIC MATERIAL, MAGNETIC POWDER AND RARE EARTH COMPOSITE MAGNET |
US6478891B1 (en) | 1999-11-25 | 2002-11-12 | Seiko Epson Corporation | Ribbon shaped magnet material magnetic powder and rare earth bonded magnet |
Also Published As
Publication number | Publication date |
---|---|
EP1017065A4 (en) | 2000-07-05 |
CN1117382C (zh) | 2003-08-06 |
CN1238062A (zh) | 1999-12-08 |
US6168673B1 (en) | 2001-01-02 |
DE69730250D1 (de) | 2004-09-16 |
KR100310647B1 (ko) | 2001-11-14 |
EP1017065B1 (en) | 2004-08-11 |
EP1017065A1 (en) | 2000-07-05 |
KR20000049280A (ko) | 2000-07-25 |
DE69730250T2 (de) | 2005-05-25 |
JPH10125518A (ja) | 1998-05-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0242187B1 (en) | Permanent magnet and method of producing same | |
EP1158545B1 (en) | Permanent magnet including multiple ferromagnetic phases and method for producing the magnet | |
EP1446816B1 (en) | Nanocomposite magnet | |
CN108417334B (zh) | R-t-b系烧结磁铁 | |
WO2010113482A1 (ja) | ナノコンポジットバルク磁石およびその製造方法 | |
EP1388152A2 (en) | Iron-based rare earth alloy nanocomposite magnet and method for producing the same | |
WO1998035364A1 (fr) | Procede de fabrication d'un aimant a plaque mince possedant une structure microcristalline | |
JP4121039B2 (ja) | 微細結晶組織を有する薄板磁石 | |
WO1998018141A1 (fr) | Aimant en feuille presentant une structure microcristalline, son procede de fabrication et procede de fabrication d'une poudre magnetique permanente isotrope | |
JPH09170055A (ja) | 希土類磁石用合金及びその製造方法並びに永久磁石の製造方法 | |
JP2665590B2 (ja) | 希土類―鉄―ボロン系磁気異方性焼結永久磁石原料用合金薄板並びに磁気異方性焼結永久磁石原料用合金粉末,及び磁気異方性焼結永久磁石 | |
CN115244206A (zh) | 铁基稀土类硼系各向同性磁铁合金 | |
EP1632299B1 (en) | Method for producing rare earth based alloy powder and method for producing rare earth based sintered magnet | |
JPH091296A (ja) | 磁石合金製造用急冷ロール | |
JPH07263210A (ja) | 永久磁石並びに永久磁石合金粉末とその製造方法 | |
WO2019220950A1 (ja) | R-t-b系希土類焼結磁石用鋳造合金薄片 | |
JP3643215B2 (ja) | 積層永久磁石の製造方法 | |
JP2002043110A (ja) | R2t17nx系磁石材料の磁気異方性凝集体とその製造方法およびボンド磁石 | |
JP2745042B2 (ja) | 希土類−鉄−ボロン系合金薄板、合金粉末及び永久磁石の製造方法 | |
JP3643214B2 (ja) | 積層永久磁石の製造方法 | |
JP2012023192A (ja) | 角形性に優れた希土類磁石の製造方法 | |
JP3710154B2 (ja) | 鉄基永久磁石とその製造方法並びにボンド磁石用鉄基永久磁石合金粉末と鉄基ボンド磁石 | |
CN115769317A (zh) | 磁体合金、粘结磁体以及它们的制造方法 | |
EP0599815B1 (en) | Magnetic alloy and method of making the same | |
JP2002088451A (ja) | 希土類磁石およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 97199785.3 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN KR RU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1019997003391 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1997944129 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09284604 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1997944129 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1019997003391 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1019997003391 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1997944129 Country of ref document: EP |