EP3702065A1 - Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique - Google Patents

Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique Download PDF

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Publication number
EP3702065A1
EP3702065A1 EP19160068.3A EP19160068A EP3702065A1 EP 3702065 A1 EP3702065 A1 EP 3702065A1 EP 19160068 A EP19160068 A EP 19160068A EP 3702065 A1 EP3702065 A1 EP 3702065A1
Authority
EP
European Patent Office
Prior art keywords
sintering
sintered
pressure
component
electrical contact
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.)
Withdrawn
Application number
EP19160068.3A
Other languages
German (de)
English (en)
Inventor
Hermann BÖDINGER
Roman Karmazin
Daniel Kupka
Carsten Schuh
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP19160068.3A priority Critical patent/EP3702065A1/fr
Publication of EP3702065A1 publication Critical patent/EP3702065A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B22F3/003—Apparatus, e.g. furnaces
    • 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
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
    • 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
    • B22F2203/00—Controlling
    • B22F2203/11—Controlling temperature, temperature profile
    • 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
    • B22F2203/00—Controlling
    • B22F2203/13—Controlling pressure
    • 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
    • C22C1/0425—Copper-based alloys

Definitions

  • the invention relates to a sintering device with at least one sintering unit for sintering sintering material with electrically conductive powder particles and a method for producing an electrical contact material using the sintering device.
  • an electrical contact material that is produced according to the method and a use of the electrical contact material are specified.
  • the electrical contact material is, for example, a copper-chromium contact material (Cu-Cr contact material) that is used for an electrical contact in a medium-voltage vacuum interrupter.
  • a contact material is produced, for example, by powder metallurgy by sintering.
  • a spark plasma sintering (SPS) system is used for this purpose.
  • SPS spark plasma sintering
  • Such a sintering device has, for example, a sintering unit for sintering sintered material (sintered body) with electrically conductive and / or non-conductive powder particles.
  • the powder particles are electrically conductive powder particles made of chromium and electrically conductive powder particles made of copper.
  • the sintered material is placed in a sintering container.
  • thermal sintering energy is introduced into the sintered material under sintering pressure (eg uniaxial pressing pressure).
  • sintering pressure eg uniaxial pressing pressure
  • electrical sintering current is passed through the sintering container and / or through the sintering material.
  • the sintering container and / or the sintering material act as Resistance heating. This means that Joule heat is distributed homogeneously in the sintered material and very high heating rates are achieved.
  • the sintering process takes place relatively quickly.
  • the additional action of the sintering pressure also results in a sintered body with high compression.
  • a pressing tool with a press punch is used to exert the sintering pressure on the sintered material.
  • the press ram is cooled.
  • the cooling of the press ram causes a high thermal gradient between the sintered material and the press ram.
  • high thermal losses can occur during sintering occur.
  • the object of the present invention is to show a possibility of how the thermal losses in a sintering device described at the beginning can be limited and the associated process costs can be limited.
  • a sintering device with at least one sintering unit for sintering sintered material.
  • the sintered material has powder particles.
  • the sintering unit is equipped with at least one sintering container for receiving the sintering material, with at least one pressure source for exerting sintering pressure on the sintering material received in the sintering container during sintering, and with at least one current Source for introducing electrical sintering current during sintering into the sintering container and / or into the sintering material received in the sintering container.
  • There is at least one sintering component for exerting the sintering pressure and for introducing the electrical sintering current.
  • the pressure source and / or the current source and / or the sintering component are designed and controllable in such a way that the exertion of the sintering pressure and the introduction of the electrical sintering current can be carried out decoupled from one another during the sintering.
  • the introduction of the electrical sintering current during the sintering into the sintering container and / or the introduction of the electrical sintering current into the sintered material received in the sintering container takes place independently of the exertion of the sintering pressure.
  • a method for producing an electrical contact material using the sintering device is specified.
  • the method is used to produce a sintered material in the form of an electrical contact material.
  • the method has the following process steps: a) arranging sintering material with electrically conductive powder particles in the sintering container and b) sintering the sintering material arranged in the sintering container, with the sintering component being used during sintering the sintering pressure on the sintered material and the introduction of the electrical sintering current can be carried out decoupled from one another.
  • inventions are an electrical contact material produced in this way and its use for at least one electrical contact of a medium-voltage vacuum interrupter.
  • the electrical contact material is in particular a copper-chromium contact material.
  • the sintering device is a spark plasma sintering system.
  • a sintered product sintered body
  • electrically conductive powder particles are preferably powder particles of at least one metal or mixtures of powder particles of different metals.
  • the metals are copper and chromium and the sintered material has copper powder particles and chromium powder particles.
  • the resulting sintered body is made of a copper-chromium contact material.
  • the sintering container (sintering mold, sintering chamber, sintering die) for holding the sintered material with the powder particles is used to shape the sintered material.
  • a green body is formed with the powder particles. Pre-compression of the sintered material preferably takes place.
  • the resulting green body can have a relatively simple shape.
  • the green body is in the form of a disk.
  • a green body with a complex geometry is also conceivable
  • the basic idea of the invention is to carry out sintering pressure on the sintered material and the introduction of the sintering current independently of one another during sintering.
  • the sintering pressure and the sintering current can be set independently of one another.
  • the decoupling of the sintering freedom degrees "sintering current" and "sintering pressure” results in a flexible sintering option.
  • Thermal energy is introduced into the sintered material during sintering.
  • the sintering material with metallic powder particles is preferred used.
  • the sintering is preferably carried out at a temperature which is selected from the range from 100.degree. C. to 1100.degree. C. and in particular from the range from 200.degree. C. to 1050.degree. Sintering takes place at a sintering temperature below the melting temperature of pure copper (1,085 ° C).
  • the pressure source has at least one pressing tool for exerting the sintering pressure on the sintering component.
  • the sintering pressure is passed on to the sintered material via the sintering component.
  • the press tool preferably has at least one press punch.
  • the sintered material arranged in the sintering container is pressed together with the powder particles with the aid of the pressure exerted on the press punch (s).
  • a sintering pressure is exerted on the sintered material, which is selected from the range of 300 N / mm 2 - 800 N / mm 2 .
  • the press punch has electrically insulating material for electrically isolating the press punch and the powder particles of the sintered material from one another.
  • the press ram can consist entirely of the electrically insulating material. It is also conceivable that the press ram has only one insulation layer with the electrically insulating material.
  • the press ram or the insulation layer of the press ram is for example made of a thermally conductive but electrically insulating material such as aluminum oxide (Al 2 O 3 ). With the electrically insulating material, the sintering pressure can be exerted on the sintered material and the electrical sintering current can be introduced into the sintered material independently of one another.
  • isostatic sintering pressure can be exerted on the sintered material.
  • uniaxial sintering pressure is applied during sintering.
  • the sintering pressure is therefore a uniaxial pressing pressure which can be exerted on the sintered material along a pressing axis.
  • electrically conductive powder particles can be electrically contacted via the sintered component.
  • the sintering component has electrically conductive material and the sintering component and the current source are connected to one another in an electrically conductive manner with the aid of at least one electrical contact so that the electrical sintering current is indirectly via the sintering component in the sintering material can be introduced.
  • the sintering current can flow away again via at least one further electrical contact (for example to a container wall made of electrically conductive material or to a further sintered component made of electrically conductive material).
  • This further electrical contact is electrically isolated from the electrical contact.
  • the electrical insulation ensures that the electrical sintering current is passed through the sintered material. A current path through the sintered material results during sintering.
  • the sintering container is preferably designed at least partially as a hollow cylinder with an end face and a cylinder longitudinal axis.
  • the front side of the hollow cylinder has the sintered component.
  • the pressing axis and the cylinder longitudinal axis are arranged next to one another in such a way that the uniaxial pressing pressure can be exerted on the sintered material indirectly via the sintering component along the cylinder longitudinal axis.
  • the front side of the hollow cylinder is bounded by the sintered component.
  • the pressing axis and the cylinder longitudinal axis are aligned with one another in such a way that the uniaxial pressing pressure can be exerted on the sintered material along the cylinder longitudinal axis.
  • the cylinder longitudinal axis and the press axis coincide.
  • the sintered material is poured into the hollow cylinder.
  • the filled sintered material is pressed by exerting a uniaxial pressing pressure along the longitudinal axis of the cylinder. Pre-pressing takes place.
  • the electrical contact has at least one elastically deformable contact, so that in the event of a change in a dimension of the sintered material induced by the sintering, the electrical contact and the sintered component remain in electrical contact. A change in a dimension of the sintered material induced by the sintering can be compensated for.
  • a compaction of the green body takes place during sintering. This is accompanied by changes in length of the green body. These changes in length are bridged with the help of the elastically deformable electrical contact.
  • the sintered component and the elastic deformable contact are connected to one another by means of a force connection (friction connection).
  • a force connection for example, one surface of the sintered component is roughened so that the sintered component and the elastic contact remain connected during sintering in such a way that the electrical sintering current to the sintered container and / or to the sintered material with the electrically conductive powder particles can be passed on.
  • the electrical contact and the sintered component or a surface of the sintered component are connected to one another by a material bond.
  • the material connection includes, for example, a soldered or welded connection.
  • the elastically deformable contact preferably has at least one electrically conductive sheathing (envelope) of the sintered component.
  • the electrically conductive jacket encloses the sintered component.
  • an electrically conductive sheath in the form of a stocking made of electrically conductive fibers is conceivable.
  • the electrically conductive sheathing has at least one sleeve with a plurality of (suitably dimensioned) sleeve strands.
  • the sleeve takes into account the need for the press plunger to be repositioned, which is caused by the compression of the sintered material (change in the dimensions of the sintered material) that takes place during sintering. This ensures that the sleeve is not stripped off the sintered component during sintering.
  • the electrical contact remains during the sintering process.
  • the sleeve is connected to the power source with sufficiently dimensioned strands, so that the movement of the sleeve is not impaired during the sintering process. With the help of the sleeve it is achieved that changes in a dimension of the sintered item or a green body are compensated for with the sintered item. The frictional contact between the sleeve and the sintering container ensures that the sleeve cannot be stripped off during sintering.
  • the sintering device can have a single sintering unit.
  • the sintering device has a large number of sintering units.
  • the sintering units are arranged in such a way that several sintering batches (green bodies) can be sintered in several sintering containers in parallel (i.e. simultaneously) or serially (i.e. one after the other).
  • the sintering units can have common sintering components (for example a heat source for introducing thermal energy).
  • a wide variety of components can be produced from a wide variety of materials or from different contact materials.
  • a copper-chromium contact material is accessible as the electrical contact material with the method.
  • a weight fraction of the chromium in the copper-chromium contact material is selected from the range from 10% by weight to 80% by weight and in particular from the range from 20% by weight to 60% by weight.
  • the proportion by weight of the chromium is preferably below 50% by weight.
  • a proportion by weight of the copper is correspondingly selected from the range from 90% by weight to 20% by weight and in particular from the range from 80% by weight to 40% by weight.
  • the proportion by weight of the copper is preferably above 50% by weight, for example between 55% by weight to 75% by weight.
  • a proportion of impurities in the copper-chromium contact material is as low as possible.
  • impurities are present in the electrical contact material and / or in the various phases with a weight fraction of less than 1% by weight and preferably less than 0.1% by weight.
  • the sintering device 1 is suitable for producing a component in the form of an electrical contact 2001 of a medium-voltage vacuum interrupter 2000.
  • the electrical contact 2001 has the electrical contact material 2002.
  • the electrical contact material 2002 is a copper-chromium contact material.
  • the proportion by weight of copper is 50% by weight and the proportion by weight of chromium is 50% by weight.
  • the proportion by weight of copper is 55% by weight and that of chromium 45% by weight.
  • the sintering device 1 has one or more sintering units 10 for sintering 1002 of sintering material 2.
  • sintering unit 10 for sintering 1002 of sintering material 2.
  • metallic chrome particles and metallic copper particles form the electrically conductive powder particles 20 of the sintered material 2.
  • the sintering unit 10 comprises a sintering container 11 for receiving the sintering material 2, a pressure source 3 for exerting sintering pressure 30 on the sintering material 2 with the electrically conductive powder particles received in the sintering container 11 20 during the sintering 1002 and an electrical current source 4 for introducing electrical sintering current 40 into the sintered material 2 with the electrically conductive powder particles 20 received in the sintering container 11 during the sintering 1002.
  • two sintering Components 5 for exerting the sintering pressure 30 and for introducing the electrical sintering current 40 are present.
  • the sintered components 5 consist of electrically conductive material 51.
  • the pressure source 3, the current source 4 and the sintering component 5 are arranged and controllable in such a way that the exertion of the sintering pressure 30 and the introduction of the electrical sintering current 40 during the sintering 1002 can be carried out decoupled from one another.
  • the application of the sintering pressure 30 and the introduction of the sintering current 40 can be carried out independently of one another.
  • the pressure source 3 comprises a pressing tool 31 for exerting the sintering pressure 30 on the sintered material 2 arranged in the sintering container 11.
  • the pressing tool 31 has a pressing punch 32.
  • the press punch 32 comprises electrically insulating material 320 for electrically isolating the press punch 32 and the electrically conductive powder particles 20 of the sintered material 2 from one another.
  • a uniaxial sintering pressure 301 is exerted on the sintered material 2 along the press axis 302 during the sintering 1002.
  • the pressing ram 32 for exerting the sintering pressure 30 consists of a thermal insulating material 330 such as an electrical insulator (for example Al 2 O 3 ).
  • the sinter container 11 is designed at least partially as a hollow cylinder 12 with end faces 120 and with a cylinder longitudinal axis 121.
  • the end faces 120 of the hollow cylinder 12 have the sintered components 5.
  • the end faces 120 are formed by the sintered components 5.
  • the pressing axis 302 and the cylinder longitudinal axis 121 are arranged next to one another in such a way that the uniaxial pressing pressure 301 is exerted indirectly on the sintered material 2 via the sintering components 5 along the cylinder longitudinal axis 121 can.
  • the pressing axis 302 and the cylinder longitudinal axis 121 coincide.
  • the sintered components 5 are each designed as full cylinders made of electrically conductive material 51.
  • the sintering components 5 and the current source 4 are connected to one another in an electrically conductive manner with the aid of electrical contacts 41, so that the electrical sintering current 40 is introduced indirectly into the sintering material 2 via one of the sintering components 5 during sintering 1002 and can be derived again from the sintered material 2 via the further sintering component 5.
  • the electrical contacts 41 have elastically deformable electrical contacts 410.
  • the elastically deformable electrical contacts 410 are formed by electrically conductive sheaths 411 of the sintered components 5.
  • the sheaths 411 in turn have cuffs 4110 with a plurality of suitably dimensioned cuff strands 4111 made of electrically conductive material.
  • the sleeves 4110 With the help of the sleeves 4110 it is ensured that a change in a dimension 21 of the sintered material 2 induced by the sintering can be compensated for.
  • the electrical contacts 41 and the sintered components 5 remain in electrical contact.
  • the sintered components 5 and the electrical contacts 41 are connected to one another by means of a force connection or friction connection 412.
  • the following method steps are carried out: a) arranging 1001 of the sintered material 2 with the electrically conductive powder particles 20 in the sintering container 10 and b) sintering 1002 of the sintered material 2 arranged in the sintering container 10, whereby during the sintering 1002 with the aid of the sintering components 5 the sintering pressure 30 is exerted on the sintered material 2 and the electrical sintering current 40 is introduced into the sinter -Good 2 can be carried out decoupled from each other.
  • a spark plasma sintering method is carried out in which the sintering pressure 30 is exerted on the sintered material 2 and the sintering stream 40 is introduced into the sintered material 2 independently of one another.
  • the sintering device 1 has a large number of the described sintering units 10. A large number of the contact materials can thus be produced in parallel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
EP19160068.3A 2019-02-28 2019-02-28 Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique Withdrawn EP3702065A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19160068.3A EP3702065A1 (fr) 2019-02-28 2019-02-28 Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19160068.3A EP3702065A1 (fr) 2019-02-28 2019-02-28 Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique

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EP3702065A1 true EP3702065A1 (fr) 2020-09-02

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EP19160068.3A Withdrawn EP3702065A1 (fr) 2019-02-28 2019-02-28 Dispositif de frittage pourvu de dispositif de pression de frittage et de dispositif de courant de frittage découplés l'un de l'autre, procédé de fabrication d'une matière de contact électrique à l'aide du dispositif de frittage, matière de contact électrique et utilisation de la matière de contact électrique

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794113A (en) * 1995-05-01 1998-08-11 The Regents Of The University Of California Simultaneous synthesis and densification by field-activated combustion
EP2198993A1 (fr) * 2008-12-19 2010-06-23 EPoS S.r.L. Procédé de frittage et dispositif
WO2014202389A1 (fr) * 2013-06-20 2014-12-24 Siemens Aktiengesellschaft Procédé et dispositif permettant de produire des éléments de contact pour des contacts de commutation électriques
EP3208015A1 (fr) * 2016-02-19 2017-08-23 Fundación Tecnalia Research & Innovation Procédé de frittage de poudres électriquement conductrices et appareil permettant de mettre en oeuvre ledit procédé
WO2018083325A1 (fr) * 2016-11-07 2018-05-11 Universite Pierre Et Marie Curie (Paris 6) Dispositif de frittage par courant pulsé et procédé associé
WO2019002777A1 (fr) * 2017-06-30 2019-01-03 Commissariat A L'energie Atomique Et Aux Energies Alternatives Procédé de fabrication de pastilles de matériau fritté, notamment en carbure de bore

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794113A (en) * 1995-05-01 1998-08-11 The Regents Of The University Of California Simultaneous synthesis and densification by field-activated combustion
EP2198993A1 (fr) * 2008-12-19 2010-06-23 EPoS S.r.L. Procédé de frittage et dispositif
WO2014202389A1 (fr) * 2013-06-20 2014-12-24 Siemens Aktiengesellschaft Procédé et dispositif permettant de produire des éléments de contact pour des contacts de commutation électriques
EP3208015A1 (fr) * 2016-02-19 2017-08-23 Fundación Tecnalia Research & Innovation Procédé de frittage de poudres électriquement conductrices et appareil permettant de mettre en oeuvre ledit procédé
WO2018083325A1 (fr) * 2016-11-07 2018-05-11 Universite Pierre Et Marie Curie (Paris 6) Dispositif de frittage par courant pulsé et procédé associé
WO2019002777A1 (fr) * 2017-06-30 2019-01-03 Commissariat A L'energie Atomique Et Aux Energies Alternatives Procédé de fabrication de pastilles de matériau fritté, notamment en carbure de bore

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DIMOS PARASKEVAS ET AL: "Spark Plasma Sintering As a Solid-State Recycling Technique: The Case of Aluminum Alloy Scrap Consolidation", MATERIALS, vol. 7, no. 8, 6 August 2014 (2014-08-06), pages 5664 - 5687, XP055598065, DOI: 10.3390/ma7085664 *

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