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WO2014087031A1 - Procédé pour la fabrication de noyaux magnétiques par métallurgie des poudres - Google Patents

Procédé pour la fabrication de noyaux magnétiques par métallurgie des poudres Download PDF

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Publication number
WO2014087031A1
WO2014087031A1 PCT/ES2013/000270 ES2013000270W WO2014087031A1 WO 2014087031 A1 WO2014087031 A1 WO 2014087031A1 ES 2013000270 W ES2013000270 W ES 2013000270W WO 2014087031 A1 WO2014087031 A1 WO 2014087031A1
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WO
WIPO (PCT)
Prior art keywords
magnetic cores
powder
consolidation
powder metallurgical
amorphous
Prior art date
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Ceased
Application number
PCT/ES2013/000270
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English (en)
Spanish (es)
Inventor
Juan Manuel Montes Martos
Jesús CINTAS FÍSICO
Petr URBAN
Francisco GÓMEZ CUEVAS
Fatima TERNERO FERNÁNDEZ
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.)
Universidad de Sevilla
Universidad de Huelva
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Universidad de Sevilla
Universidad de Huelva
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Filing date
Publication date
Application filed by Universidad de Sevilla, Universidad de Huelva filed Critical Universidad de Sevilla
Priority to EP13859820.6A priority Critical patent/EP2929963A4/fr
Publication of WO2014087031A1 publication Critical patent/WO2014087031A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/07—Metallic powder characterised by particles having a nanoscale microstructure
    • 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
    • B22F9/002—Making metallic powder or suspensions thereof amorphous or microcrystalline
    • 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
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15341—Preparation processes therefor
    • H01F1/1535—Preparation processes therefor by powder metallurgy, e.g. spark erosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder
    • 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
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
    • 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
    • B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
    • 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
    • B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling fluid
    • 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
    • B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
    • 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
    • B22F2009/048—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by pulverising a quenched ribbon
    • 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
    • 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
    • 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%
    • C22C33/0285—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% with Cr, Co, or Ni having a minimum content higher than 5%
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing

Definitions

  • the object of the present invention is an alternative method of manufacturing material cores: (1) completely amorphous, (2) amorphous matrix with nanocrystalline regions, or (3) completely nanocrystalline, which allows to obtain blocks of material (not formed by bonding of tapes) with the definitive or quasi-definitive form, replacing the melt-spinning technique with a powder metallurgical route consisting of the amortization of dust by means of high-energy mechanical grinding and subsequent rapid consolidation by electric means (FAST techniques, Field Assisted Sintering Tech ⁇ iques).
  • This invention falls within the scientific-technical area of "material technology” and more specifically to the manufacturing sector, from powders, of all types of parts intended for functions of magnetic core.
  • materials for transformer cores and electric motors are the most used by volume of raw material, and the most important, by percentage of global market. And within them, silicon steel in the form of sheets is used in 90% of transformer cores, which accounts for 60% of the total market volume of soft (sweet) magnetic materials [1, 3].
  • iron due to its intrinsically sweet magnetic character.
  • the introduction of other elements can improve your behavior.
  • iron with 6.5% silicon results in a very reasonable behavior: a high magnetic induction is maintained, but significantly reducing magnetic anisotropy, by compensating for the magnetostriction constant and magnetocrystalline anisotropy (a material is all the more soft the smaller its magnetic anisotropy).
  • Further improvements of this basic material can be achieved through a series of thermomechanical processes or treatments, designed to induce certain textures that reduce hysterical losses. Likewise, rolling processes are carried out, in order to reduce losses at high frequencies [3,4].
  • sweet materials include structurally amorphous and nanocrystalline alloys, which are actually the softest materials in existence.
  • structurally amorphous materials magnetocrystalline anisotropy is practically nil.
  • the atomic disorder that characterizes its structure entails the absence of grain boundaries (the main obstacles that hinder the movement of the walls of the magnetic domains). Due to the absence of grain boundaries, amorphous ferromagnetic materials have very narrow hysteresis cycles and very low energy products, which makes them magnetically very soft materials [1, 2, 5].
  • nanocrystalline alloys these materials consist of small grains, of nanometric size, embedded in a matrix with amorphous structure.
  • a compensation effect of the magnetostriction constant between the two crystalline and amorphous phases (of opposite signs to each other) occurs here and, on the other hand, magnetocrystalline anisotropy is averaged macroscopically [1, 2, 5, 6].
  • the internal atomic disorder increases the electrical resistivity of the material (approximately an order of magnitude higher than the conventional polycrystalline alloy of the same composition).
  • the high electrical resistivity of amorphous and nanocrystalline alloys is also associated with the reduction of losses due to eddy currents. Therefore, the use of amorphous or nanocrystalline metals in the motor cores or electrical transformers results in a more efficient operation.
  • combining the savings derived from the better magnetic behavior and the considerable reduction of Foucault currents it has been estimated that by replacing the cores of current power distribution transformers with amorphous materials, energy losses would be reduced by 75 % [1, 2].
  • the difficulty lies in how to manufacture these materials, as conventional melting and molding techniques inevitably provide polycrystalline, never amorphous, metal materials with typically micrometric, non-nanometric grain sizes.
  • melt-spinning The usual technique of manufacturing amorphous metal in relatively large quantities is called melt-spinning [2, 5] and consists essentially of solidifying a metal, from the liquid state, on the thermally very conductive surface and normally kept at a low temperature of a rotating wheel
  • the severe cooling rate up to one million degrees Celsius per second — imposed on the atoms of the liquid, prevents them from finding the positions of the crystalline state.
  • the result is that the material solidifies, but not with its atoms placed in a perfectly ordered arrangement (crystalline state), but in complete disorder (amorphous state).
  • the described process has the disadvantage that it only allows the production of very thin tapes (the maximum thickness should typically be less than 0.1 mm, and the maximum width reached so far is about 25 cm). To form a piece it is necessary to stack and join many of these tapes. Thus, the challenge of obtaining a block of amorphous material still persists.
  • various powder metallurgical techniques have been designed whose starting point should be the production of amorphous dust.
  • the production in large quantities of amorphous metal powders has been demonstrated using variations of the rapid cooling method in which the liquid is sprayed in the form of very small drops that are cooled sharply (by thermal conduction) in a fluid. 'Spray spraying', 'high-velocity gas jet atomization' and some other methods have been successfully used for this purpose
  • amorphous cores both for electric motors, such as transformers or polar parts
  • manufacture of amorphous material in the form of thin tapes by very severe cooling, melt spinning) and its subsequent stacking and / or folding for the formation of the final piece.
  • the process can be expensive, and the properties of the piece often resent the fact of having too many borders.
  • This patent is to show an alternative route of manufacturing material cores: (1) completely amorphous, (2) amorphous matrix with nanocrystalline regions, or (3) completely nanocrystalline, which allows to obtain blocks of material (not formed by joining tapes) with the definitive or quasi-definitive form, replacing the melt-spinning technique with a powder metallurgical route consisting of the amortization of dust by means of high-energy mechanical grinding and subsequent rapid consolidation by electric means ( FAST techniques, Field Assisted Sintering Techniques).
  • FAST techniques Field Assisted Sintering Techniques
  • This combination allows, in addition to obtaining massive pieces of amorphous material (or partially nanocrystalline) with the definitive or quasi-definitive form, to reduce the amount of metalloids present in the alloy, necessary to retain the amorphous character at room temperature. In principle, it is expected to be suitable for manufacturing small parts, but nothing prevents designing larger parts by assembling smaller attachable blocks.
  • the manufacturing method proposed in the present invention consists of a novel powder metallurgical route consisting of two stages: (i) a first powder amortization by high-energy and long-term grinding and (ii) a second of formed of the piece by means of some form of electrical consolidation of the amortized powder, such as the so-called sintering by electrical resistance SRE, or the so-called consolidation by electric shock CDE, but not necessarily one of these.
  • the requirement of electrical consolidation is due to the fact that the conventional cold-pressed powder-sinking route in the furnace does not work in this case because during the sintering stage, the necessary high temperatures and the time during which they are maintained make the material devitrify, losing the amorphous character achieved by grinding.
  • the magnetic cores obtained by this procedure may have a completely amorphous, completely nanocrystalline character, or a combination of the above (nanocrystalline regions embedded in amorphous matrix).
  • the technical problem solved by the present invention is to produce block amorphous cores (not constituted by joining tapes) by lowering their production cost and, eventually, improving some properties.
  • the solution to this technical problem, as indicated, is to establish a powder metallurgical route consisting of the use of mechanical grinding as a form of dust amortization and electrical consolidation of the amortized powder, which due to its extraordinary speed and nature, inhibits the devitrification of the material. Because of its simplicity, the proposed method represents a simplification of the production process and implies cost reduction.
  • a possible variant of the proposed method instead of non-amorphous powders, would use as a starting material, tapes previously amortized by any conventional method of amortization (for example, melt spinning).
  • the belts should be crushed by mechanical grinding of short duration, prior to their electrical consolidation.
  • the possible uses of the invention are varied, including the manufacture of all types of cores of master material intended for applications of transformers and electric motors, as well as other sweet polar parts.
  • the possible restriction to small parts can be overcome by assembling smaller, attachable parts, manufactured by the route proposed here.
  • FIG. 1 It shows a scheme of an "attritor" type high-energy ball mill, where the mechanical grinding amortization stage that is part of the method object of the present invention can be performed.
  • FIG. It shows a scheme of the system where the amortized powder from the mill of Figure 1 is electrically consolidated and constitutes the second stage of the method recommended by the present invention.
  • the method for the powder metallurgical manufacture of magnetic cores, object of the present invention is characterized in that it comprises (i) a first stage of amortization of a mixture of magnetically soft powders by mechanical grinding; and (i ⁇ ) a second stage of electrical consolidation of the amortized powder in the first stage.
  • the mechanical alloy is a process that involves the repeated deformation, fracture and continuous welding of the dust particles (metallic and non-metallic) by the constant action of the high energy grinding to which they are subjected.
  • figure 1 shows a type of ball mill where high-energy mechanical grinding is performed, although the high-energy mill does not necessarily have to be this. This process has the advantage of obtaining true solid state alloys, since an intimate combination takes place at the atomic level.
  • Electric consolidation techniques not only allow the cold pressing and sintering stages of the oven to be combined in a single stage, but also reduce their duration, so that the use of inert atmospheres is unnecessary (the time in which the powder is exposed to high temperatures is too short for undesirable oxidation reactions to take place), and the process can be carried out in the air.
  • the time reduction can be very considerable: if the joint cold pressing process (on matrix or isostatic) and sintered in the oven can take around 30-60 minutes, the electrical consolidation can take only a few seconds, or even less, depending on the specific modality used.
  • the SRE and the CDE have characteristic durations around the second ( ⁇ 0.1 - 50 s) and the millisecond ( ⁇ 0.1 - 100 ms), respectively, and sources of electric power also different: in the SRE, a transformer that provides low voltage ( ⁇ 10 - 30 V) and high intensity ( ⁇ 5 - 20 kA), and in the CDE, a capacitor bank, capable of supplying voltages during discharge means ( ⁇ 50 - 300 V) and high intensities ( ⁇ 1 - 5 kA).
  • the matrix 1 is electrically insulating (for example, made of natural rock, refractory concrete, ceramic tube and metal strip, etc.).
  • the electrodes 2 will be of some copper alloy with high conductivity (for example, Cu-Zr alloy). In order to achieve greater uniformity in the indoor temperature, it may be interesting to interpose between the powder 3 and the electrode 2 a wafer 4 of somewhat less conductive material, for example, a pseudo-alloy (heavy metal) of Cu-W, which will also provide resistance to the EDM
  • the power source 5 may consist of a welding transformer (in the case of the SRE) that provides current intensities in the range of 2 to 12 kA, either with grid frequency (50 Hz) or better still, with higher frequencies , in the range of the average frequencies ( ⁇ 1000 Hz).
  • a second possibility in the case of the CDE could be the use as a power source of a capacitor bank, large capacity and load voltages in the range of 50 to 500 V.
  • Another possibility is to operate with both types from sources, for example, in a sequential application thereof: first discharge by capacitors, and then intervention of the welding transformer. This last possibility may have the advantage of allowing larger sized parts to be approached, whose electrical resistance is too high to be produced solely by the SRE technique.
  • the powder mixture is subjected to mechanical grinding in an attritor-type high-energy ball mill, as shown in Figure 1, rotating at 500 rpm and water-cooled (20 ° C).
  • ethylene-bis-stearamide micro-powder wax can be added in a proportion between 1.5% and 2% by weight.
  • the atmosphere of the grinding vessel will be argon gas.
  • the duration of grinding is set between 30 and 40 hours.
  • the electrical consolidation process by SRE is carried out in the air, with nominal parameters of 80 MPa pressure, a current density of ⁇ 6.5 kA / cm 2 , and a passage time of 70 cycles, of 0.02 s each cycle.
  • the SRE can use medium frequency electric current, around 1000 Hz.).
  • the final density of the compact must be 90% or higher.
  • the compact is cooled in situ, due to the effect of electrodes that are cooled by water. Finally, the compact is extracted from the matrix. If the chosen parameters have been suitable for the mass and geometry of the compact, it will have retained the amorphous character of the base powder, or at least, it will be constituted by an amorphous matrix in whose bosom islands of nanocrystalline material could have arisen.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Nanotechnology (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

Procédé pour la fabrication de noyaux magnétiques par métallurgie des poudres, caractérisé en ce qu'il comprend (i) une première étape d'amorphisation d'un mélange de poudres magnétiquement douces par broyage mécanique; et (ii) une seconde étape de consolidation électrique FAST (Field Assisted Sintering Techniques) de la poudre amorphisée à la première étape.
PCT/ES2013/000270 2012-12-05 2013-12-05 Procédé pour la fabrication de noyaux magnétiques par métallurgie des poudres Ceased WO2014087031A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13859820.6A EP2929963A4 (fr) 2012-12-05 2013-12-05 Procédé pour la fabrication de noyaux magnétiques par métallurgie des poudres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201201228A ES2473690B1 (es) 2012-12-05 2012-12-05 Método para la fabricación pulvimetalúrgica de núcleos magnéticos
ESP201201228 2012-12-05

Publications (1)

Publication Number Publication Date
WO2014087031A1 true WO2014087031A1 (fr) 2014-06-12

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CN115036120B (zh) * 2022-08-11 2023-01-03 佛山市顺德区伊戈尔电力科技有限公司 一种灌沙石浇筑式移相变压器的制备方法

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WO2006010780A1 (fr) * 2004-06-25 2006-02-02 Universidad De Sevilla Broyage mecanique de poudres active par rayonnement ultraviolet
US20060172073A1 (en) * 2005-02-01 2006-08-03 Groza Joanna R Methods for production of FGM net shaped body for various applications
CN101724907A (zh) * 2009-09-25 2010-06-09 北京工业大学 一种单相纳米晶Mn3(Cu0.5Ge0.5)N负热膨胀块体材料的制备方法

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TW455631B (en) * 1997-08-28 2001-09-21 Alps Electric Co Ltd Bulky magnetic core and laminated magnetic core
JP3913167B2 (ja) * 2002-12-25 2007-05-09 独立行政法人科学技術振興機構 金属ガラスからなるバルク状のＦｅ基焼結合金軟磁性材料およびその製造方法
WO2005087963A1 (fr) * 2004-03-11 2005-09-22 Japan Science And Technology Agency Materiau trempe solidifie en vrac et procede de fabrication dudit materiau

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