EP0554792A2 - Matériau composite argent-nickel pour des contacts électriques et électrodes - Google Patents
Matériau composite argent-nickel pour des contacts électriques et électrodes Download PDFInfo
- Publication number
- EP0554792A2 EP0554792A2 EP19930101302 EP93101302A EP0554792A2 EP 0554792 A2 EP0554792 A2 EP 0554792A2 EP 19930101302 EP19930101302 EP 19930101302 EP 93101302 A EP93101302 A EP 93101302A EP 0554792 A2 EP0554792 A2 EP 0554792A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nickel
- silver
- composite material
- electrodes
- material according
- 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.)
- Granted
Links
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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.
- 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 be formed by placing 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 consists.
- 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 .
- the nickel component 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.
- the even burn-off over the cross-section, compared to 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. of an oxygen-impermeable silver alloy matrix and embedded fibers made of a nickel alloy, which is common for spark plugs, or of concentric rings or spirally wound sheets made of alternating oxygen-impermeable silver alloy and a common 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 pipes filled with the response voltage-reducing 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 chemically attacked, so that long service lives result.
- the low response voltage allows larger electrode distances.
- the silver component further additives, for example additives against sulfur attacks, e.g. Add palladium.
- the silver-nickel fiber composite material can also be attached only in or on customary central and / or body electrodes as an attachment or insert at the end on the ignition side.
Landscapes
- Spark Plugs (AREA)
- Contacts (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
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 true EP0554792A2 (fr) | 1993-08-11 |
EP0554792A3 EP0554792A3 (en) | 1993-11-24 |
EP0554792B1 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108441668A (zh) * | 2018-04-13 | 2018-08-24 | 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 |
Families Citing this family (9)
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 |
DE112012004420B4 (de) | 2011-10-24 | 2018-03-29 | Federal-Mogul Ignition Co. | Verfahren zum Herstellen einer Elektrode einer Zündkerze und Zündkerzen-Herstellungsverfahren |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2361274A1 (de) * | 1973-12-08 | 1975-06-19 | Rau Fa G | Elektrode, insbesondere mittelelektrode fuer zuendkerzen |
EP0401598A1 (fr) * | 1989-06-05 | 1990-12-12 | G. Rau GmbH. & Co. | Electrode centrale pour bougies d'allumage de moteurs à combustion interne |
Family Cites Families (13)
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 |
US1970318A (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 |
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 |
-
1992
- 1992-02-05 DE DE4203250A patent/DE4203250A1/de not_active Withdrawn
-
1993
- 1993-01-28 EP EP93101302A patent/EP0554792B1/fr not_active Expired - Lifetime
- 1993-01-28 DE DE59300833T patent/DE59300833D1/de not_active Expired - Fee Related
- 1993-01-28 ES ES93101302T patent/ES2079215T3/es not_active Expired - Lifetime
- 1993-02-05 JP JP5040693A patent/JPH0676917A/ja active Pending
-
1995
- 1995-02-23 US US08/393,040 patent/US5500304A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2361274A1 (de) * | 1973-12-08 | 1975-06-19 | Rau Fa G | Elektrode, insbesondere mittelelektrode fuer zuendkerzen |
EP0401598A1 (fr) * | 1989-06-05 | 1990-12-12 | G. Rau GmbH. & Co. | Electrode centrale pour bougies d'allumage de moteurs à combustion interne |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108441668A (zh) * | 2018-04-13 | 2018-08-24 | 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 |
Also Published As
Publication number | Publication date |
---|---|
ES2079215T3 (es) | 1996-01-01 |
EP0554792B1 (fr) | 1995-11-02 |
DE59300833D1 (de) | 1995-12-07 |
JPH0676917A (ja) | 1994-03-18 |
DE4203250A1 (de) | 1993-08-12 |
EP0554792A3 (en) | 1993-11-24 |
US5500304A (en) | 1996-03-19 |
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