EP0554792B1 - Matériau composite argent-nickel pour des contacts électriques et électrodes - Google Patents

Matériau composite argent-nickel pour des contacts électriques et électrodes Download PDF

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Publication number
EP0554792B1
EP0554792B1 EP93101302A EP93101302A EP0554792B1 EP 0554792 B1 EP0554792 B1 EP 0554792B1 EP 93101302 A EP93101302 A EP 93101302A EP 93101302 A EP93101302 A EP 93101302A EP 0554792 B1 EP0554792 B1 EP 0554792B1
Authority
EP
European Patent Office
Prior art keywords
nickel
silver
composite material
material according
electrodes
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.)
Expired - Lifetime
Application number
EP93101302A
Other languages
German (de)
English (en)
Other versions
EP0554792A2 (fr
EP0554792A3 (en
Inventor
Otto Löffler
Werner Niessner
Heinz Ambacher
Friedrich E. Schneider
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.)
BERU Ruprecht GmbH and Co KG
Rau G GmbH and Co
Beru Werk Albert Ruprecht GmbH and Co KG
Original Assignee
BERU Ruprecht GmbH and Co KG
Rau G GmbH and Co
Beru Werk Albert Ruprecht GmbH and Co KG
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 BERU Ruprecht GmbH and Co KG, Rau G GmbH and Co, Beru Werk Albert Ruprecht GmbH and Co KG filed Critical BERU Ruprecht GmbH and Co KG
Publication of EP0554792A2 publication Critical patent/EP0554792A2/fr
Publication of EP0554792A3 publication Critical patent/EP0554792A3/de
Application granted granted Critical
Publication of EP0554792B1 publication Critical patent/EP0554792B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/39—Selection of materials for electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12486—Laterally noncoextensive components [e.g., embedded, etc.]

Definitions

  • the invention relates to a silver-nickel composite material for electrical contacts and electrodes, in particular for spark plug electrodes.
  • Such a silver-nickel composite material in the form of a silver-nickel fiber composite for electrodes and a method for its production are known from DE-OS 2 508 490 (see also DE-A-2361274).
  • a manufacturing process for silver-nickel fiber composite materials can also be found in DE-OS 2 259 636.
  • DE-OS 3 213 481 it is also known to have a composite material consisting of two spirally wound silver alloy layers to form by arranging the material in a tube after the spiral rolling up and extruding or pulling it into a wire.
  • the object on which the invention is based is therefore to create a silver-nickel composite material of the type mentioned at the outset, which allows a longer service life for the electrical contacts and electrodes formed from it and for the devices equipped with these contacts and electrodes, for example spark plugs.
  • the silver component made of an oxygen-impermeable silver alloy and the nickel component consists of nickel or a nickel alloy.
  • the silver-nickel composite according to the invention oxygen attacks on the nickel component, in particular on nickel fibers in a silver matrix, are prevented, so that there is a higher chemical resistance and the silver-nickel composite according to the invention is suitable as an electrode material for contacts and electrodes with a long service life .
  • EP-A-401 598 discloses a center electrode for spark plugs, which has a copper core which is provided in the area of the ignition tip with a coating made of a silver alloy with reduced oxygen permeability.
  • the nickel component in particular can consist of nickel fibers with approximately 1,000 fibers per mm 2 cross section, which are embedded in a silver matrix.
  • a high number of fibers per cross-sectional area unit is important, which are sufficiently thin so that the composite does not break apart due to the different thermal expansion.
  • spark plugs consist of such a composite material
  • very low response voltages result due to the peak effect and field distortion (silver non-magnetic, nickel magnetic), which facilitates cold starts.
  • peak effect and field distortion silver non-magnetic, nickel magnetic
  • the even burn-off across the cross-section, in comparison with electrodes that consist only of silver or only nickel and burn off at the edges, in conjunction with the chemical resistance of the electrodes enables a long service life of the spark plug.
  • the oxygen-tight silver alloy from which the silver component is made according to the invention preferably contains silicon or tin additives or additives of materials with a similar effect, i.e. an effect which makes the silver alloy oxygen-tight, in particular 0.05 to 0.3% by weight of silicon, preferably 0.3% by weight of silicon, or more than 2% by weight of tin being added.
  • the single figure shows a partial sectional view of a spark plug.
  • the spark plug shown in the drawing usually consists of an insulator 1, a body part 2, a center electrode 3, a glass melt 4 and a body electrode 5. Between the body electrode 5 and the center electrode 3 there is the spark gap 6.
  • the material for the center electrode 3 and the body electrode 5 is a silver-nickel composite e.g. from an oxygen-impermeable silver alloy matrix and embedded fibers from a nickel alloy, which is common for spark plugs, or from concentric rings or spirally wound sheets made of alternating oxygen-impermeable silver alloy and a conventional nickel alloy. Electrodes made from the silver-nickel composite material according to the invention can be used in combination with common counter-electrodes made from nickel, from a nickel jacket and copper core, from full silver, fitted with platinum or from a silver jacket, copper core and separating layer.
  • the silver-nickel composite material according to the invention can consist of 20-80% Ni or Ni alloy and the oxygen-impermeable silver with 100 to 6,000 fibers of nickel (nickel alloy) per mm2.
  • a preferred nickel alloy contains 0.3% by weight of Mg and 1-4% by weight of Si, with other alloys such as e.g. Inconel 601 or nickel with a chromium content etc. can be used.
  • the silver-nickel composite material according to the invention can also be used to form electrical contacts, which can consist of the composite material according to the invention as a solid material or can be provided with welded-on disks made of the composite material according to the invention, in which case the carrier material can also be copper or steel , since it is not exposed to the conditions in the engine combustion chamber.
  • nickel tubes filled with the response voltage-lowering substances are embedded in the silver matrix, metal oxides and semiconductors are used as fillers that withstand the combustion chamber conditions.
  • a spark plug with a center electrode made of the composite material according to the invention was tested in continuous operation, it being shown that the response voltage remained almost the same over 300 hours of continuous operation (less than 10% change).
  • the minimum erosion was more uniform over the entire spark-coated ignition area compared to other electrode materials, the edges were much more stable compared to the erosion.
  • the silver-nickel composite material according to the invention is accessible for mass production, the glass melting of a central electrode made of this composite material is possible with commercially available long-life resistant resistance sealing glasses under atmospheric oxygen, the nickel fibers giving the necessary mechanical and thermal stability.
  • the composite material according to the invention is only minimally attacked chemically, so that long service lives result.
  • the low response voltage allows larger electrode distances.
  • additives against sulfur attacks e.g. Add palladium
  • the silver-nickel fiber composite material can also be attached only in or on conventional central and / or body electrodes as an attachment or insert at the ignition-side end.

Landscapes

  • Spark Plugs (AREA)
  • Contacts (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (8)

  1. Matériau composite argent-nickel pour contacts électriques et électrodes, en particulier pour électrodes de bougies d'allumage, caractérisé en ce que le composant argent consiste en un alliage d'argent imperméable à l'oxygène et le composant nickel consiste en nickel ou un alliage de nickel.
  2. Matériau composite selon revendication 1, caractérisé en ce que l'alliage d'argent contient du silicium ou de l'étain.
  3. Matériau composite selon revendication 2, caractérisé en ce que l'alliage d'argent contient 0,05 à 0,3% en poids de silicium.
  4. Matériau composite selon revendication 2 ou 3, caractérisé en ce que l'alliage d'argent contient plus de 2% en poids d'étain.
  5. Matériau composite selon une ou plusieurs des revendications qui précèdent, caractérisé en ce que le composant nickel consiste en 100 à 6 000 fibres de nickel par mm², qui sont noyées dans une gangue de l'alliage d'argent.
  6. Matériau composite selon une des revendications 1 à 4, caractérisé en ce que le composant nickel consiste en tubes de nickel ou d'alliage de nickel qui sont remplis d'une matière diminuant le travail d'échappement et sont noyés dans une gangue d'argent puis soumis à un façonnage complémentaire mettant le nickel à l'état de fibres minces.
  7. Matériau composite selon une des revendications 1 à 4, caractérisé en ce que des tubes d'argent et des tubes de nickel sont enfilés les uns dans les autres alternativement et réduits à l'état de couches minces par façonnage.
  8. Matériau composite selon une des revendications 1 à 4, caractérisé en ce qu'il consiste en un assemblage de feuilles d'argent et de nickel enroulées alternativement en spirale et réduit en une matière composite à couches minces.
EP93101302A 1992-02-05 1993-01-28 Matériau composite argent-nickel pour des contacts électriques et électrodes Expired - Lifetime EP0554792B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203250 1992-02-05
DE4203250A DE4203250A1 (de) 1992-02-05 1992-02-05 Silber-nickel-verbundwerkstoff fuer elektrische kontakte und elektroden

Publications (3)

Publication Number Publication Date
EP0554792A2 EP0554792A2 (fr) 1993-08-11
EP0554792A3 EP0554792A3 (en) 1993-11-24
EP0554792B1 true EP0554792B1 (fr) 1995-11-02

Family

ID=6450990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101302A Expired - Lifetime EP0554792B1 (fr) 1992-02-05 1993-01-28 Matériau composite argent-nickel pour des contacts électriques et électrodes

Country Status (5)

Country Link
US (1) US5500304A (fr)
EP (1) EP0554792B1 (fr)
JP (1) JPH0676917A (fr)
DE (2) DE4203250A1 (fr)
ES (1) ES2079215T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5679471A (en) * 1995-10-16 1997-10-21 General Motors Corporation Silver-nickel nano-composite coating for terminals of separable electrical connectors
US7575665B2 (en) * 2005-04-28 2009-08-18 Delphi Technologies, Inc. Method of reducing corrosion of silver containing surfaces
US8019296B1 (en) * 2008-04-17 2011-09-13 Sprint Spectrum L.P. Selective scanning for WLAN coverage by a multi-mode device
DE102008043225A1 (de) 2008-10-28 2010-04-29 Robert Bosch Gmbh Zündkerzenelektrode hergestellt aus verbessertem Zündkerzenelektrodenmaterial
US8334642B2 (en) 2010-05-11 2012-12-18 Caterpillar Inc. Spark plug
WO2013063092A1 (fr) 2011-10-24 2013-05-02 Federal-Mogul Ignition Company Electrode de bougie d'allumage et procédé de fabrication de bougie d'allumage
US9130358B2 (en) 2013-03-13 2015-09-08 Federal-Mogul Ignition Company Method of manufacturing spark plug electrode material
CN104131246B (zh) * 2014-07-02 2016-05-11 昆明理工大学 一种含镍纤维银金属氧化物电触头材料及其制备方法
JP6456343B2 (ja) * 2016-11-30 2019-01-23 日本特殊陶業株式会社 点火プラグ
CN108441668B (zh) * 2018-04-13 2021-02-26 上海和伍复合材料有限公司 一种银钨电接触材料及其制备方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720894A (en) * 1924-04-03 1929-07-16 Oneida Community Ltd Tarnish-resisting silver alloy, etc., and process for producing the same
US1970319A (en) * 1931-05-08 1934-08-14 American Metal Co Ltd Silver alloy
US2052143A (en) * 1935-08-20 1936-08-25 American Metal Co Ltd Silver alloys
BE452819A (fr) * 1938-04-30
US3738920A (en) * 1971-05-20 1973-06-12 G Viglione Plating tarnish-inhibited bright silver alloy
DE2250810B2 (de) * 1972-10-17 1976-04-08 Fa. G. Rau, 7530 Pforzheim Kontaktstueck, insbesondere kontaktniet, und herstellungsverfahren hierzu
DE2259636A1 (de) * 1972-12-06 1974-06-20 Rau Fa G Verfahren zur herstellung eines metallischen faserverbundwerkstoffes
US4112905A (en) * 1973-12-08 1978-09-12 G. Rau Spark plugs for internal combustion engines
DE2361274C3 (de) * 1973-12-08 1980-10-09 G. Rau, Gmbh & Co, 7530 Pforzheim Drahtförmige Elektrode, insbesondere Mittelelektrode, für Zündkerzen für Brennkraftmaschinen
DE2508490C3 (de) * 1975-02-27 1984-07-26 G. Rau GmbH & Co, 7530 Pforzheim Metallischer Verbundwerkstoff und Verfahren zu dessen Herstellung
DE2549931A1 (de) * 1975-11-07 1977-05-18 Bosch Gmbh Robert Zuendkerzen-elektrode
US4324588A (en) * 1979-08-17 1982-04-13 Engelhard Corporation Arc erosion resistant composite materials and processes for their manufacture
DE3213481A1 (de) * 1982-04-10 1983-10-13 G. Rau GmbH & Co, 7530 Pforzheim Verbundwerkstoff als halbzeug fuer ein elektrisches kontaktstueck und herstellungsverfahren hierzu
JPS61130446A (ja) * 1984-11-29 1986-06-18 Tanaka Kikinzoku Kogyo Kk すり接点材料
DE3918278A1 (de) * 1989-06-05 1990-12-06 Rau Gmbh G Mittelelektrode fuer zuendkerzen und brennkraftmaschinen

Also Published As

Publication number Publication date
EP0554792A2 (fr) 1993-08-11
ES2079215T3 (es) 1996-01-01
EP0554792A3 (en) 1993-11-24
DE59300833D1 (de) 1995-12-07
US5500304A (en) 1996-03-19
DE4203250A1 (de) 1993-08-12
JPH0676917A (ja) 1994-03-18

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