Classifications

• • 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
  • C22C1/0466—Alloys based on noble metals
• • 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
  • B22F1/09—Mixtures of metallic powders
• • 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
  • B22F1/12—Metallic powder containing non-metallic particles
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
  • C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C5/00—Alloys based on noble metals
  • C22C5/06—Alloys based on silver
• • 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
  • H01H1/023—Composite material having a noble metal as the basic material
• • 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
  • H01H1/023—Composite material having a noble metal as the basic material
  • H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
• • 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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
  • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
  • H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
• • 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
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/922—Static electricity metal bleed-off metallic stock
  • Y10S428/9265—Special properties
  • Y10S428/929—Electrical contact feature
• • 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
  • Y10T428/12014—All metal or with adjacent metals having metal particles
  • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
• • 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
  • Y10T428/12014—All metal or with adjacent metals having metal particles
  • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
  • Y10T428/12167—Nonmetal containing
• • 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
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
  • Y10T428/12771—Transition metal-base component
  • Y10T428/12861—Group VIII or IB metal-base component
  • Y10T428/12896—Ag-base component
• • 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
  • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
  • Y10T428/2813—Heat or solvent activated or sealable

Definitions

• the invention relates to a sintered silver-iron material with 0.5 to 20% by weight of iron and 0 to 5% by weight of other metallic, oxidic, nitridic and / or carbidic additives, the rest silver, for electrical contacts and a method for the production of this material.
• DE-AS 11-53-178 discloses silver contact materials which, in addition to silver and the component to be oxidized, range from 0.001 to 1%. Nickel, iron, molybdenum, cobalt, chromium, titanium and / or Contain vanadium.
• DE-AS 11 06 965 describes a process for producing densely sintered shaped bodies made of silver with 5 to 50% of at least one of the metals vanadium, tantalum, chromium, molybdenum, tungsten, iron, cobalt or nickel, which can also serve as contact material.
• silver-iron materials have so far not been used more widely because they tend to form cover layers when switching and thus lead to high contact heating. None of these materials achieve the favorable properties of the silver-nickel sintered materials.
• the iron particles in the sintered material have a carbon content of more than 0.25% by weight and a microhardness of more than 200 HV 0.025.
• the iron particles should preferably have a carbon content of more than 0.4% by weight and a microhardness of more than 400 HV 0.025.
• Silver-iron materials in which the iron particles in the sintered state have a carbon content of 0.6 to 1.2% by weight and a microhardness of more than 600 HV 0.025, have proven best.
• These materials are manufactured by mixing silver powder with 0.5 to 20% by weight iron powder and 0 to 5% by weight other metallic, oxidic, nitridic and / or carbidic additives, cold isostatic pressing, sintering at 650 to 940 ° C under protective gas and extrusion, using an iron powder which contains more than 0.25% by weight of carbon, and the sintering must take place in a hydrogen-free protective gas atmosphere.
• the silver-iron material according to the invention shows practically the same behavior as silver-nickel materials with regard to the service life and the other properties.
• the silver-iron materials can contain 0 to 5% by weight of metallic additives such as zinc, copper, manganese, rhenium, iridium and ruthenium, or non-metallic additives such as tungsten oxide, molybdenum oxide, iron oxides, magnesium oxide, calcium oxide, yttrium oxide, tantalum oxide, chromium oxide, manganese oxide, Zinc oxide, aluminum oxide, indium oxide, silicon oxide and zirconium oxide can be added.
• metallic additives such as zinc, copper, manganese, rhenium, iridium and ruthenium
• non-metallic additives such as tungsten oxide, molybdenum oxide, iron oxides, magnesium oxide, calcium oxide, yttrium oxide, tantalum oxide, chromium oxide, manganese oxide, Zinc oxide, aluminum oxide, indium oxide, silicon oxide and zirconium oxide can be added.
• the materials according to the invention can also be processed better.
• the reason for this is that the iron is distributed significantly more finely within the silver matrix during extrusion and that the iron does not deform into elongated iron lines due to the brittleness, as in the known silver-iron materials.
• the materials can be manufactured economically and are comparable in their switching properties to the silver-nickel material, in particular the overtemperature and service life show values that silver-nickel materials also achieve.
• AgNi20 90 110,000 2nd AgFe8.5Zn1.5 116 95,000 3rd AgFe8 130 95,000 4th AgFe8Re5 95 90,000 5 AgFe6MgO0.5 95 90,000 6 AgFe8.5Zn1.5 110 110,000 7 AgFe6 110 110,000 8th AgFe6Re0.5 80 100,000 9 AgFe4MgO0.5 80 105,000 10th AgFe4 80 100,000 11 AgFe10 120 125,000 12th AgFe8Al2O30.5 95 110,000 13 AgFe8SnO20.5 90 110,000 14 AgFe8SiO20.5 90 115,000 15 AgFe8Ir0.5 95 125,000 16 AgFe8Ru0.5 90 115,000
• the wires can always be easily processed into contact pieces.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Composite Materials (AREA)
• Manufacturing & Machinery (AREA)
• Powder Metallurgy (AREA)
• Contacts (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=7786472

Family Applications (1)

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Cited By (1)

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Citations (3)

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• 1996
  • 1996-02-27 DE DE19607183A patent/DE19607183C1/de not_active Expired - Fee Related
• 1997
  • 1997-01-29 DE DE59703840T patent/DE59703840D1/de not_active Expired - Lifetime
  • 1997-01-29 ES ES97101342T patent/ES2160270T3/es not_active Expired - Lifetime
  • 1997-01-29 EP EP97101342A patent/EP0795367B1/fr not_active Expired - Lifetime
  • 1997-02-24 JP JP9038646A patent/JPH09235634A/ja not_active Withdrawn
  • 1997-02-26 CN CN97101995A patent/CN1080766C/zh not_active Expired - Fee Related
  • 1997-02-27 US US08/806,725 patent/US5985440A/en not_active Expired - Fee Related

Patent Citations (3)

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