EP0171339A1 - Method of making electrical contacts - Google Patents

Method of making electrical contacts Download PDF

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Publication number
EP0171339A1
EP0171339A1 EP85420134A EP85420134A EP0171339A1 EP 0171339 A1 EP0171339 A1 EP 0171339A1 EP 85420134 A EP85420134 A EP 85420134A EP 85420134 A EP85420134 A EP 85420134A EP 0171339 A1 EP0171339 A1 EP 0171339A1
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Prior art keywords
metal
carbon
alloy
alloys
electrical contact
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EP85420134A
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German (de)
French (fr)
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EP0171339B1 (en
Inventor
Paul Reille
Dominique Berger
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Mersen SA
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Carbone Lorraine SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/027—Composite material containing carbon particles or fibres

Definitions

  • the present invention relates to a method for manufacturing electrical contacts made of metal or metal alloy and carbon fibers, and to the contacts obtained.
  • This process has the major drawback of being difficult to implement.
  • the duration of the soaking must be well defined so as not to transform all the carbon into carbide, and one cannot obtain contacts consisting solely of the chosen metal and of carbon wires.
  • the carbon wires are aligned in a preferential direction, that is to say in general perpendicular to the contact surface, so as to reduce the wear by the arc which forms during switching operations.
  • Another disadvantage is that it requires an expensive and bulky device for compression.
  • One of the aims of the invention is to overcome the drawbacks which the methods described present.
  • This process also makes it possible to use, at the start, carbon fibers of relatively great length of the order of 30 to 50 mm.
  • the metal or metal alloy is chosen from those which are good conductors of electricity and which do not react with carbon at the melting temperature of the metal.
  • metal or alloy can be dictated by reasons of economy and / or abundance of the metal.
  • copper and its alloys can be used which, for good contact performance, have the advantage of being more economical and more abundant than silver.
  • the carbon fiber substrate can consist of loose fibers or preferably a felt.
  • carbon fibers are also understood to mean graphite fibers.
  • the percentage of carbon in the final product is obtained by varying the density of the fiber substrate. This density can vary from 0.05 to 1, the rate of metal or alloy therefore varies from 97.5% to 45% by volume.
  • 80 g of carbonized viscose fibers with a diameter of 10 ⁇ m and a length of 50 mm are compacted in the form of a felt with a diameter of 80 mm and a thickness of 80 mm.
  • This felt is impregnated with molten copper, at 1100 ° C under a pressure of 5 bars.
  • the billet obtained contains 87% by volume of copper and its examination that the carbon fibers have retained their length (around 50 mm) and their random orientation after impregnation.
  • This billet is then hot-spun at 850 ° C through a circular section of 12 mm diameter.
  • the bar is finally cut perpendicular to the axis of the spinning in discs of thickness 1 mm.
  • the discs obtained were used as covering contacts. It has been found that their performance relative to their cost price is such that they can advantageously replace the silver-cadmium oxide contacts despite a shorter lifespan,
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with the molten Cu-Cr-Zr alloy at 1050 ° C. under a pressure of 5 bars.
  • the billet obtained contains 84.5% by volume of Cu-Cr-Zr alloy.
  • This billet is then hot-spun at 820 ° through a die of square section 12 X 12 mm.
  • the bar obtained consists of a rectangular section 12 X 12 mm and 2.8 m long, which is cut into slices 1 mm thick which are used as opening contacts.
  • Example 2 All the observations indicated in Example 1 are applicable to Example 2.
  • This example is a variant of Example 2.
  • the Cu-Cr-Zr alloy after quenching and tempering, sees its mechanical properties markedly increased.
  • the bar obtained is heated to 1000 ° C, then quenched with water and annealed to 475 ° C.
  • This example is a variant of Example 1: copper is replaced by silver.
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with molten silver, at 1000 ° C., under a pressure of 5 bars.
  • the hillette obtained contains 83% by volume of silver.
  • This billet is then hot-spun at 780 ° C in the same die.
  • the bar obtained consists of a cylinder with a diameter of 12 mm and a length of 3 m which is cut into discs 1 mm thick which are used as contacts.

Abstract

1. A process for the production of an electrical contact formed by a substrate of carbon fibres of small diameter which are aligned in a preferential direction and impregnated with a metal or metal alloy which is a good conductor of electric current, characterized in that the carbon fibres forming the substrate are between 2 and 50 mu m in diameter and that after impregnation under pressure with a metal or alloy which does not react with the carbon, the material produced in that way is subjected to a hot extrusion operation.

Description

La présente invention est relative à un procédé de fabrication de contacts électriques constitués de métal ou d'alliage métallique et de fibres de carbone, et aux contacts obtenus.The present invention relates to a method for manufacturing electrical contacts made of metal or metal alloy and carbon fibers, and to the contacts obtained.

Il est connu,par le brevet français 2 115 865, de réaliser des contacts électriques à base de métal et de carbone en trempant des fils de carbone sous un gaz de protection ou sous une atmosphère réductrice ou encore sous un vide poussé de moins de 5.10-5 torrs, dans un métal liquide bon conducteur, notamment du cuivre et/ou de l'argent, auquel on ajoute 0,5 à 5 % d'un métal susceptible de former un carbure afin de rendre le carbone mouillable par le métal.It is known from French patent 2 115 865 to make electrical contacts based on metal and carbon by dipping carbon wires under a protective gas or under a reducing atmosphere or under a high vacuum of less than 5.10 - 5 torrs, in a good conductive liquid metal, in particular copper and / or silver, to which is added 0.5 to 5% of a metal capable of forming a carbide in order to make the carbon wettable by the metal.

Ce procédé présente l'inconvénient majeur d'être de mise en oeuvre délicate. En particulier, la durée du trempage doit être bien définie de manière à ne pas transformer tout le carbone en carbure, et l'on ne peut obtenir de contacts constitués uniquement du métal choisi et de fils de carbone.This process has the major drawback of being difficult to implement. In particular, the duration of the soaking must be well defined so as not to transform all the carbon into carbide, and one cannot obtain contacts consisting solely of the chosen metal and of carbon wires.

Par ailleurs, il est souvent souhaité que les fils de carbone soient alignés suivant une direction préférentielle, c'est-à-dire en général perpendiculairement à la surface de contact, de manière à réduire l'usure par l'arc qui se forme lors des opérations de commutation.Furthermore, it is often desired that the carbon wires are aligned in a preferential direction, that is to say in general perpendicular to the contact surface, so as to reduce the wear by the arc which forms during switching operations.

Cet alignement, dans le cadre du brevet cité, ne peut être obtenu qu'en réalisant un substrat carboné adéquat avant trempage.This alignment, within the framework of the cited patent, can only be obtained by producing an adequate carbon substrate before soaking.

Il est également connu par la demande de brevet japonais publiée 57.54236 de réaliser un contact électrique en mélangeant de la poudre métallique avec des fibres de carbone préalablement revêtues d'un métal ou d'un alliage magnétique, puis en comprimant ce mélange en présence d'un champ magnétique.It is also known from published Japanese patent application 57.54236 to make an electrical contact by mixing metal powder with carbon fibers previously coated with a metal or a magnetic alloy, then by compressing this mixture in the presence of a magnetic field.

=Un des inconvénients de ce procédé est l'obligation de revêtir les fibres de carbone. Cette opération est onéreuse et délicate, et introduit dand le contact des substances magnétiques pas toujours souhaitées selon son utilisation.,= One of the drawbacks of this process is the obligation to coat the carbon fibers. This operation is expensive and delicate, and introduced into contact with magnetic substances not always desired depending on its use.,

Un autre inconvénient est de nécessiter pour la compression un dispositif coûteux et encombrantAnother disadvantage is that it requires an expensive and bulky device for compression.

Un des buts de l'invention est de pallier les inconvénients que présentent les procédés décrits.One of the aims of the invention is to overcome the drawbacks which the methods described present.

Un autre but de l'invention est de pouvoir réaliser des contacts électriques constitués de métal ou d'alliage métallique et de fibres de carbone, de faible diamètre, de l'ordre de 2 à 50 µm, contacts, dans lesquels

  • - les fibres de carbone soient très courtes (de l'ordre de 15 µm à.150 µm), très bien orientées et très bien dispersées,
  • - la densité de carbone puisse être facilement ajustée-Ces buts sont atteints suivant l'invention qui consiste en un procédé de fabrication de contact électrique constitué de métal ou d'alliage métallique et de fibres de carbone de faible diamètre de l'ordre de 2 à 50 µm et alignées selon une direction préférentielle, procédé caractérisé en ce qn'il combine les deux opérations suivantes :
  • a) l'imprégnation d'un substrat de fibres de carbone de faible diamètre avec le métal ou l'alliage fondu, sous pression,
  • b) le filage à chaud du matériau ainsi obtenu.
Another object of the invention is to be able to produce electrical contacts made of metal or metal alloy and carbon fibers, of small diameter, of the order of 2 to 50 μm, contacts, in which
  • - the carbon fibers are very short (of the order of 15 µm to 150 µm), very well oriented and very well dispersed,
  • - the carbon density can be easily adjusted-These goals are achieved according to the invention which consists of a method of manufacturing electrical contact consisting of metal or metal alloy and carbon fibers of small diameter of the order of 2 at 50 µm and aligned in a preferred direction, process characterized in that it combines the following two operations:
  • a) impregnation of a small diameter carbon fiber substrate with the molten metal or alloy, under pressure,
  • b) hot spinning of the material thus obtained.

Les deux opérations de ce procédé sont en elles-mêmes connues, la première par le brevet français 1 368 129, la seconde étant couramment utilisée en métallurgie par exemple.The two operations of this process are known in themselves, the first by French patent 1,368,129, the second being commonly used in metallurgy for example.

Leur combinaison pour l'application visée, non encore connue à ce jour, permet d'obtenir de manière simple et économique des contacts :

  • - ne contenant que les éléments constitutifs de départ puisque le mode d'imprégnation choisie ne nécessite aucune adjonction et que l'orientation des fibres est obtenue par le filage,
  • - dont les fibres sont alignées quasiment selon une seule direction, et très bien dispersées.
Their combination for the intended application, not yet known to date, allows contacts to be obtained in a simple and economical manner:
  • - containing only the initial constituent elements since the method of impregnation chosen does not require any addition and the orientation of the fibers is obtained by spinning,
  • - whose fibers are aligned almost in one direction, and very well dispersed.

Ce procédé permet en outre d'utiliser au départ des fibres de carbone de longueur relativement grande de l'ordre de 30 à 50 mm..This process also makes it possible to use, at the start, carbon fibers of relatively great length of the order of 30 to 50 mm.

Au cours du filage, elles sont sectionnées en fragments de longueur de l'ordre de 15 à 500 µm.During spinning, they are sectioned into fragments of length on the order of 15 to 500 µm.

Le métal ou l'alliage métallique est choisi parmi ceux qui sont bons conducteurs de l'électricité et qui ne réagissent pas avec le carbone à la température de fusion du métal.The metal or metal alloy is chosen from those which are good conductors of electricity and which do not react with carbon at the melting temperature of the metal.

A titre indicatif, on peut citer le cuivre et ses alliages, l'argent et ses alliages, le cadmium,By way of indication, mention may be made of copper and its alloys, silver and its alloys, cadmium,

Le choix du métal ou de l'alliage peut être dicté par des raisons d'économie etfou d'abondance du métal. Ainsi, on peut utiliser le cuivre et ses alliages qui, pour de bonnes performances de contact, ont l'avantage d'être plus économiques et plus abondants que l'argent.The choice of metal or alloy can be dictated by reasons of economy and / or abundance of the metal. Thus, copper and its alloys can be used which, for good contact performance, have the advantage of being more economical and more abundant than silver.

Le substrat de fïbres de carbone peut être constitué par des fibres en vrac ou de préférence par un feutre.The carbon fiber substrate can consist of loose fibers or preferably a felt.

Bien entendu par fibres de carbone, on entend également les fibres de graphite.Of course, carbon fibers are also understood to mean graphite fibers.

Le pourcentage de carbone dans le produit final est obtenu en faisant varier la densité du substrat de fibres. Cette densité peut varier de 0,05 à 1, le taux de métal ou d'alliage varie donc de 97,5% à 45% en volume.The percentage of carbon in the final product is obtained by varying the density of the fiber substrate. This density can vary from 0.05 to 1, the rate of metal or alloy therefore varies from 97.5% to 45% by volume.

Les exemples suivants donnés à titre indicatif et non limitatif, illustrent l'invention..The following examples, given by way of non-limiting illustration, illustrate the invention.

Exemple 1Example 1

80 g de fibres de viscose carbonisée de diamètre 10 µm et de longueur 50 mm sont compactées sous la forme d'un feutre de diamètre 80 mm et d'épaisseur 80 mm.80 g of carbonized viscose fibers with a diameter of 10 μm and a length of 50 mm are compacted in the form of a felt with a diameter of 80 mm and a thickness of 80 mm.

Ce feutre est imprégné par du cuivre fondu,à 1100°C sous une pression de 5 bars.This felt is impregnated with molten copper, at 1100 ° C under a pressure of 5 bars.

La billette obtenue contient 87% en volume de cuivre et son examen montre que les fibres de carbone ont conservé leur longueur(environ 50 mm)et leur orientation aléatoire après imprégnation.The billet obtained contains 87% by volume of copper and its examination that the carbon fibers have retained their length (around 50 mm) and their random orientation after impregnation.

Cette billette est alors filée à chaud à 850° C à travers une filière de section circulaire de 12 mm de diamètre.This billet is then hot-spun at 850 ° C through a circular section of 12 mm diameter.

La barre obtenue est constituée d'un cylindre de 12 mm de diamètre et de 3 m de longueur dans lequel :

  • - les fibres de carbone ont été sectionnées par filage en fragments de 15 à 150 µm de longueur,
  • - tous ces fragments ont été alignés selon l'axe du filage. comme le montrent les figures 1 et 2 représentant des micrographies au grossissement de 130, respectivement d'une coupe du cylindre selon son axe et d'une coupe perpendiculaire à son axe.
The bar obtained consists of a cylinder 12 mm in diameter and 3 m in length in which:
  • - the carbon fibers were sectioned by spinning into fragments of 15 to 150 μm in length,
  • - all of these fragments have been aligned along the spinning axis. as shown in Figures 1 and 2 showing micrographs at 130 magnification, respectively of a section of the cylinder along its axis and a section perpendicular to its axis.

Sur ces figures où les fibres apparaissent en noir, on constate que :

  • 1) les fibres sont toutes alignées suivant une seule direction qui est l'axe du filage. En effet, sur la figure 1, on ne voit en noir que des petits "tirets", bien parallèles, leur longueur étant celle des fibres; sur la figure 2, on ne voit en noir que des "points", leur diamètre étant celui des fibres.
  • 2) les fibres sont très bien dispersées puisque sur la figure 1, il n'y a pas d'amalgames de "tirets", et sur la figure 2, il n'y a pas d'amalgames de "points".
In these figures where the fibers appear in black, it can be seen that:
  • 1) the fibers are all aligned in a single direction which is the spinning axis. In fact, in FIG. 1, we see in black only small "dashes", quite parallel, their length being that of the fibers; in FIG. 2, only "dots" are seen in black, their diameter being that of the fibers.
  • 2) the fibers are very well dispersed since in FIG. 1, there are no amalgams of "dashes", and in FIG. 2, there are no amalgams of "dots".

La barre est enfin tronçonnée perpendiculairement à l'axe du filage en disques d'épaisseur 1 mm.The bar is finally cut perpendicular to the axis of the spinning in discs of thickness 1 mm.

Les disques ohtenus ont été utilisés comme contacts couvrants I1 a été constaté que leurs performances par rapport à leur prix de revient sont telles qu'ils peuvent avantageusement remplacer les contacts argent-oxyde de cadmium malgré une durée de vie plus courte,The discs obtained were used as covering contacts. It has been found that their performance relative to their cost price is such that they can advantageously replace the silver-cadmium oxide contacts despite a shorter lifespan,

Exemple 2Example 2

Cet exemple est une variante de l'exemple 1 : le cuivre est remplacé par un de ses alliages avec du chrome et du zirconium. Les pourcentages en poids sont les suivants :

  • Cuivre 98,5 %
  • Chrome 1 %
  • Zirconium 0,5 %
This example is a variant of Example 1: copper is replaced by one of its alloys with chromium and zirconium. The percentages in weights are as follows:
  • Copper 98.5%
  • Chrome 1%
  • 0.5% zirconium

Le substrat de fibres utilisé est le même que dans l'exemple 1.The fiber substrate used is the same as in Example 1.

Le feutre est imprégné par l'alliage Cu-Cr-Zr fondu, à 1050° C, sous une pression de 5 bars.The felt is impregnated with the molten Cu-Cr-Zr alloy at 1050 ° C. under a pressure of 5 bars.

La billette obtenue contient 84,5 % en volume d'alliage Cu-Cr-Zr.The billet obtained contains 84.5% by volume of Cu-Cr-Zr alloy.

Cette billette est alors filée à chaud à 820° à travers une filière de section carrée 12 X 12 mm.This billet is then hot-spun at 820 ° through a die of square section 12 X 12 mm.

La barre obtenue est constituée d'un parallélépipède de section carrée 12 X 12 mm et de longueur 2,8 m que l'on tronçonne en tranches de 1 mm d'épaisseur qui sont utilisées comme contacts ouvrants.The bar obtained consists of a rectangular section 12 X 12 mm and 2.8 m long, which is cut into slices 1 mm thick which are used as opening contacts.

Toutes les constatations indiquées dans l'exemple 1 sont applicables à l'exemple 2.All the observations indicated in Example 1 are applicable to Example 2.

Exemple 3Example 3

Cet exemple est une variante de l'exemple 2.This example is a variant of Example 2.

L'alliage Cu-Cr-Zr, après trempe et revenu, voit ses propriétés mécaniques nettement augmentées..The Cu-Cr-Zr alloy, after quenching and tempering, sees its mechanical properties markedly increased.

De ce fait, après le filage, la barre obtenue est chauffée à 1000° C, puis trempée à l'eau et recuite à 475° C.Therefore, after spinning, the bar obtained is heated to 1000 ° C, then quenched with water and annealed to 475 ° C.

On constate que les contacts obtenus par tronçonnage de cette barre ont une durée de vie sensiblement améliorée comparée à celle des contacts obtenus suivant l'exemple 2.It can be seen that the contacts obtained by cutting off this bar have a significantly improved lifetime compared to that of the contacts obtained according to Example 2.

Exemple 4Example 4

Cet exemple est une variante de l'exemple 1 : le cuivre est remplacé par de l'argent..This example is a variant of Example 1: copper is replaced by silver.

Le substrat de fibres utilisé est le même que dans l'exemple 1.The fiber substrate used is the same as in Example 1.

Le feutre est imprégné par de l'argent fondu, à 1000° C, sous une pression de 5 bars..The felt is impregnated with molten silver, at 1000 ° C., under a pressure of 5 bars.

La hillette obtenue contient 83 % en volume d'argent.The hillette obtained contains 83% by volume of silver.

Cette billette est alors filée à chaud à 780° C dans la même filière.This billet is then hot-spun at 780 ° C in the same die.

La barre obtenue est constituée d'un cylindre de diamètre de 12 mm et de longueur 3 m que l'on tronçonne en disques de 1 mm d'épaisseur qui sont utilisés comme contacts.The bar obtained consists of a cylinder with a diameter of 12 mm and a length of 3 m which is cut into discs 1 mm thick which are used as contacts.

On constate que ces contacts ont des performances sensiblement améliorées par rapport à celles des contacts argent-carbone traditionnels.It can be seen that these contacts have significantly improved performance compared to those of traditional silver-carbon contacts.

Les exemples ci-dessus n'illustrent que l'utilisation de quelques métaux ou alliages.. Il est clair que d'autres métaux et alliages peuvent être utilisés sans sortir pour autant du cadre de l'invention : il suffit alors d'adapter les conditions d'imprégnation et de filage à leurs caractéristiques pnysiques..The examples above only illustrate the use of a few metals or alloys. It is clear that other metals and alloys can be used without departing from the scope of the invention: it suffices to adapt the impregnation and spinning conditions to their physical characteristics.

Claims (7)

1. Procédé de fahrication de contact électrique constitué de métal ou d'alliage métallique et de fibres de carbone de faible diamètre de l'ordre de 2 à 50µm et alignées selon une direction préférentielle, procédé caractérisé en ce qu'il comporte les deux opérations successives suivantes : a) on imprègne un substrat de fibres de carbone de faible diamètre avec le métal ou l'alliage fondu, sous pression, b) on file à chaud l'e matériau ainsi obtenu. 1. A method of manufacturing an electrical contact consisting of metal or metal alloy and small diameter carbon fibers of the order of 2 to 50 μm and aligned in a preferred direction, a method characterized in that it comprises the two operations following successive: a) a carbon fiber substrate of small diameter is impregnated with the metal or the molten alloy, under pressure, b) hot e material obtained in this way. 2. Procédé selon la revendication 1, caractérisé en ce que le métal ou l'alliage métallique est choisi parmi le cuivre et ses alliages, l'argent et ses alliages, le cadmium.2. Method according to claim 1, characterized in that the metal or the metal alloy is chosen from copper and its alloys, silver and its alloys, cadmium. 3. Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce que le substrat de fibres de carbone est constitué par des fibres en vrac ou par un feutre.3. Method according to claim 1 or claim 2, characterized in that the carbon fiber substrate is constituted by loose fibers or by a felt. 4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les fibres de carbone du substrat ont une longueur initiale de quelques mm à quelques dizaines de mm et sont sectionnées par le filage en fragments de 15 à 500µm de longueur.4. Method according to any one of claims 1 to 3, characterized in that the carbon fibers of the substrate have an initial length of a few mm to a few tens of mm and are sectioned by spinning into fragments of 15 to 500 µm in length . 5. Contact électrique caractérisé en ce qu'il est obtenu par le procédé revendiqué dans l'une quelconque des revendications 1 à 4.5. Electrical contact characterized in that it is obtained by the process claimed in any one of claims 1 to 4. 6. Contact électrique selon la revendication 5, caractérisé en ce qu'il est constitué par un matériau composite constitué uniquement de métal ou d'alliage métallique et de fibres de carbone de diamètre de l'ordre de 2 à 50µm, de longueur comprise entre 15 et 150µm, très bien alignées selon une seule direction et très bien dispersées.6. Electrical contact according to claim 5, characterized in that it consists of a composite material consisting solely of metal or metal alloy and carbon fibers with a diameter of the order of 2 to 50 µm, of length between 15 and 150µm, very well aligned in one direction and very well dispersed. 7. Contact électrique selon la revendication 6, caractérisé en ce que le métal ou l'alliage métallique est choisi parmi le cuivre et ses alliages, l'argent et ses alliages, le cadmium,7. Electrical contact according to claim 6, characterized in that the metal or the metal alloy is chosen from copper and its alloys, silver and its alloys, cadmium,
EP85420134A 1984-07-25 1985-07-22 Method of making electrical contacts Expired EP0171339B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420134T ATE38738T1 (en) 1984-07-25 1985-07-22 METHOD OF MAKING ELECTRICAL CONTACTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412036A FR2568417B1 (en) 1984-07-25 1984-07-25 METHOD FOR MANUFACTURING ELECTRICAL CONTACTS AND CONTACTS OBTAINED.
FR8412036 1984-07-25

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EP0171339A1 true EP0171339A1 (en) 1986-02-12
EP0171339B1 EP0171339B1 (en) 1988-11-17

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AT (1) ATE38738T1 (en)
DE (1) DE3566323D1 (en)
FR (1) FR2568417B1 (en)

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EP0290311A1 (en) * 1987-05-04 1988-11-09 Merlin Gerin Sintered composite material for electrical contacts, and contact discs using said material
DE3806573A1 (en) * 1988-03-01 1989-09-14 Siemens Ag Pair of contacts
EP0729162A1 (en) * 1995-02-27 1996-08-28 Schneider Electric Sa Process for the fabrication of a material for electric contact composite
EP1477467A1 (en) * 2003-05-16 2004-11-17 Hitachi Metals, Ltd. Composite material having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate
EP1655749A1 (en) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Contact pastille for a movable electrical contact of a circuit breaker, movable electrical contact with such a pastille and circuit breaker with such a contact
CN101151384B (en) * 2005-03-29 2011-07-06 日立金属株式会社 High-heat-conduction composite with graphite grain dispersed and process for producing the same

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JP5342315B2 (en) * 2009-04-24 2013-11-13 パナソニック株式会社 Electric connection terminal device for signal and manufacturing method thereof

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FR2115865A5 (en) * 1970-11-24 1972-07-07 Duerrwaechter E Dr Doduco Carbon fibres - satd with copper or silver to form solid soln contact material
FR2203151A1 (en) * 1972-10-17 1974-05-10 Rau Fa G
FR2247544A1 (en) * 1973-10-12 1975-05-09 Rau Fa G

Cited By (13)

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Publication number Priority date Publication date Assignee Title
EP0290311A1 (en) * 1987-05-04 1988-11-09 Merlin Gerin Sintered composite material for electrical contacts, and contact discs using said material
FR2615046A1 (en) * 1987-05-04 1988-11-10 Merlin Gerin FRITTE COMPOSITE MATERIAL FOR ELECTRICAL CONTACT AND CONTACT POCKET USING THE MATERIAL
US4919717A (en) * 1987-05-04 1990-04-24 Merlin Gerin Sintered composite material for electrical contact
DE3806573A1 (en) * 1988-03-01 1989-09-14 Siemens Ag Pair of contacts
EP0729162A1 (en) * 1995-02-27 1996-08-28 Schneider Electric Sa Process for the fabrication of a material for electric contact composite
FR2731106A1 (en) * 1995-02-27 1996-08-30 Schneider Electric Sa METHOD FOR MANUFACTURING COMPOSITE ELECTRIC CONTACT MATERIAL
EP1477467A1 (en) * 2003-05-16 2004-11-17 Hitachi Metals, Ltd. Composite material having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate
US7282265B2 (en) 2003-05-16 2007-10-16 Hitachi Metals, Ltd. Composite material having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
EP2179976A1 (en) * 2003-05-16 2010-04-28 Hitachi Metals, Ltd. Composite material having high thermal conductivity and low thermal expansion coefficient
US7708050B2 (en) 2003-05-16 2010-05-04 Hitachi Metals, Ltd. Composite material, having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
US7923103B2 (en) 2003-05-16 2011-04-12 Hitachi Metals, Ltd. Composite material, having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
EP1655749A1 (en) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Contact pastille for a movable electrical contact of a circuit breaker, movable electrical contact with such a pastille and circuit breaker with such a contact
CN101151384B (en) * 2005-03-29 2011-07-06 日立金属株式会社 High-heat-conduction composite with graphite grain dispersed and process for producing the same

Also Published As

Publication number Publication date
FR2568417A1 (en) 1986-01-31
EP0171339B1 (en) 1988-11-17
ATE38738T1 (en) 1988-12-15
JPS61107676A (en) 1986-05-26
FR2568417B1 (en) 1986-11-28
DE3566323D1 (en) 1988-12-22

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