WO1989010419A1 - Matiere frittee pour contact electrique a base d'argent utilisee dans des appareils commutateurs d'energie, notamment plots de contact de commutateurs de basse tension - Google Patents

Matiere frittee pour contact electrique a base d'argent utilisee dans des appareils commutateurs d'energie, notamment plots de contact de commutateurs de basse tension Download PDF

Info

Publication number
WO1989010419A1
WO1989010419A1 PCT/DE1989/000240 DE8900240W WO8910419A1 WO 1989010419 A1 WO1989010419 A1 WO 1989010419A1 DE 8900240 W DE8900240 W DE 8900240W WO 8910419 A1 WO8910419 A1 WO 8910419A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact material
silver
contact
material according
sintered contact
Prior art date
Application number
PCT/DE1989/000240
Other languages
German (de)
English (en)
Inventor
Wolfgang Haufe
Joachim Grosse
Bernhard +Di Rothkegel
Original Assignee
Siemens Aktiengesellschaft
Rothkegel, Rita +Hf
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 Aktiengesellschaft, Rothkegel, Rita +Hf filed Critical Siemens Aktiengesellschaft
Publication of WO1989010419A1 publication Critical patent/WO1989010419A1/fr

Links

Classifications

    • 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
    • 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
    • C22C32/0047—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 with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0068—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 with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides

Definitions

  • Sintered contact material based on silver for use in switching devices in energy technology, in particular for contact pieces in low-voltage switches
  • the invention relates to a sintered contact material based on silver for use in switching devices in power engineering, in particular for contact pieces in low-voltage switches, which contains, in addition to silver, at least one higher melting metal, a metal alloy and / or a metal compound as an active component.
  • switching devices in power engineering are to be understood exclusively as air switching devices.
  • contact materials of the silver-metal (AgMe) system have long proven themselves.
  • the silver-nickel (AgNi) system had a significant proportion of these contact materials.
  • the advantageous properties of silver-nickel in contact systems are described together with the test methods for contact materials, for example in Int. 3. Powder Metallurgy and Powder Technology, Vol. 12 (1986), P 219-228.
  • the contact material contains, in addition to silver (Ag) as the active component, at least one nitride of the metals tantalum (Ta), titanium (Ti) or zirconium (Zr).
  • the active component can be present in the material in mass proportions of up to 50%.
  • the nitrides of the metals mentioned can each be present individually or in combination.
  • the contact material can additionally contain carbides and / or borides of the metals tantalum, titanium or zirconium as further active components.
  • the carbides and / or borides of these metals can have a mass fraction of 1 to 50% based on the nitride fraction as the main active component.
  • the additional carbides and / or borides make it possible to increase the proportion of the base components in the material, ie to reduce the necessary proportion of silver. Overall, the material can contain base components in mass proportions of up to 50%.
  • a silver-based contact material which consists of at least one nitride of the metals titanium, zirconium, hafnium, vanadium, columbium or tantalum and at the same time a high-melting component such as tungsten or molybdenum or their carbides .
  • a high-melting component such as tungsten or molybdenum or their carbides.
  • the high-melting component specifically comprises zirconium carbide and / or zirconium nitride and in which tungsten or molybdenum or their carbides together with borides or nitrides of the above-mentioned metals are only given in preferred training.
  • zirconium carbide in the event that only zirconium carbide is present, its proportion is between 2.5 and 74% by weight, in particular 30% by weight; especially in the case where zirconium nitride is present with or without further boride (s) and / or nitride (s), their proportion is between 50 and 74% by weight.
  • the table shows measured values for the maximum welding force in N, for the volume erosion in mm 3 and for the contact resistance in m. These measured values characterize in combination in each case the property spectrum of the contact material, in particular the volume erosion being a significant measure of the possible number of switching operations of the contact, ie the service life of the contact piece, and the contact resistance being a significant measure of the excess temperature at the contact piece.
  • the measured values of the individual examples are compared with the measured values of the AgNilO used up to now.
  • the contact material a commercially available silver powder and metal nitride powder or powder as well as the powders of the possible further components are used
  • Powder mixture produced by wet mixing The maximum particle size of the powder is approximately 25 ⁇ m. Molded parts are pressed from the powder mixture into contact pieces at a pressure of 200 MPa. For a secure connection technique of the contact pieces to the contact piece carriers by brazing, it can be advantageous to press a second layer of pure silver together with the contact layer into a two-layer contact piece during this pressing process.
  • the moldings There is a sintering the moldings at a temperature of about 850 * C for about one hour in vacuum or under protective gas.
  • the sintered bodies are subsequently pressed at a pressure of 1000 MPa and sintered again at 650 ° C. for about an hour in a vacuum or under a protective gas.
  • the contact pieces thus produced are again calibrated at a pressure of 1000 MPa.
  • contact pieces can also be produced by first processing the contact material into strips or wires by extrusion. Contact pieces with a directional structure can then be separated from this semi-finished product.
  • the individual nitrides of the metals tantalum, titanium and zircon were initially used.
  • the composition of the active components was chosen in such a way that a volume fraction corresponding to the nickel in the material AgNilO is achieved.
  • the individual nitrides of the different metals are combined with one another and on the other hand nitrides of the metals are combined with carbides and / or borides of the same or other metals.
  • their mass fractions are measured so that they are between 1 and 50% based on the nitride fractions.
  • the welding force, the volume burn-off and the contact resistance were determined in a known manner in a test switch under constant test conditions at an inrush current of 1000 A and an off current of 1000 A using a switching number of 500.
  • the results are summarized in the table and compared with an AgNilO material.
  • the table shows that the maximum welding force in all examples is considerably lower than the known AgNilO reference material.
  • the volume erosion is also consistently below that of the reference material.
  • the contact resistance is of the same order of magnitude as that of the comparison material, sometimes even at higher values.
  • the contact property spectrum formed by the combination of the individual values shows values comparable with AgNilO.
  • the specified contact materials can therefore replace the AgNi materials, so that nickel nickel can now be completely dispensed with.

Landscapes

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

Abstract

Des matériaux pour contacts contiennent outre l'argent au moins un métal, un alliage métallique ou un composé métallique ayant un point de fusion plus élevé que l'argent. Selon l'invention, un tel matériau contient outre l'argent (Ag) au moins un nitrure des métaux tantale (Ta), titane (Ti) ou zirconium (Zr) dans des proportions massiques comprises entre 2 et 50%. Le cas échéant, le matériau peut également contenir des carbures et/ou des borures des métaux tantale, titane ou zirconium. Il s'est révélé que ces matériaux présentent un spectre de propriétés de contact essentiellement similaire à celui du matériau AgNi 10 et peuvent par conséquent remplacer complètement ce dernier.
PCT/DE1989/000240 1988-04-20 1989-04-19 Matiere frittee pour contact electrique a base d'argent utilisee dans des appareils commutateurs d'energie, notamment plots de contact de commutateurs de basse tension WO1989010419A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3813310.5 1988-04-20
DE19883813310 DE3813310A1 (de) 1988-04-20 1988-04-20 Sinterkontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik, insbesondere fuer kontaktstuecke in niederspannungsschaltern

Publications (1)

Publication Number Publication Date
WO1989010419A1 true WO1989010419A1 (fr) 1989-11-02

Family

ID=6352481

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1989/000240 WO1989010419A1 (fr) 1988-04-20 1989-04-19 Matiere frittee pour contact electrique a base d'argent utilisee dans des appareils commutateurs d'energie, notamment plots de contact de commutateurs de basse tension

Country Status (2)

Country Link
DE (1) DE3813310A1 (fr)
WO (1) WO1989010419A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180984A (en) * 1937-09-29 1939-11-21 Mallory & Co Inc P R Metal composition
GB516275A (en) * 1937-12-16 1939-12-28 Mallory Metallurg Prod Ltd Improvements in and relating to metal compositions
JPS589952A (ja) * 1981-07-10 1983-01-20 Sumitomo Electric Ind Ltd 電気接点材料

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180984A (en) * 1937-09-29 1939-11-21 Mallory & Co Inc P R Metal composition
GB516275A (en) * 1937-12-16 1939-12-28 Mallory Metallurg Prod Ltd Improvements in and relating to metal compositions
JPS589952A (ja) * 1981-07-10 1983-01-20 Sumitomo Electric Ind Ltd 電気接点材料

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 7, Nr. 77 (C-159)(1222), 30 M{rz 1983; & JP-A-58 009 952 (SUMITOMO DENKI KOGYO K.K.) 20 Januar 1983 *

Also Published As

Publication number Publication date
DE3813310A1 (de) 1989-11-02

Similar Documents

Publication Publication Date Title
DE2659012A1 (de) Sinterkontaktwerkstoff aus silber und eingelagerten metalloxiden
EP0414709B1 (fr) Materiau fritte de contact a base d'argent utilise dans des appareils commutateurs d'energie, notamment des plots de contact de commutateurs a basse tension
DE1303549B (de) Verfahren zum Herstellen eines Sinter Verbundstoffes fur hochbelastbare elektri sehe Kontakte
EP0586410B1 (fr) Materiau de contact a base d'argent pour l'utilisation dans des appareils de commutation en technologie des courants forts, ainsi que procede pour la fabrication de pieces de contact en ce materiau
EP0586411B1 (fr) Materiau de contact a base d'argent pour l'utilisation dans des appareils de commutation en technologie des courants forts, ainsi que procede pour la fabrication de pieces de contact en ce materiau
EP0118708B1 (fr) Matériau de contact fritté pour appareillages interrupteurs à basse tension
EP0795367B1 (fr) Matière argent-fer pour contacts interrupteurs électriques et procédé pour sa fabrication
EP0152606B1 (fr) Matériau de contact et procédé de préparation de pièces de contact
EP0181149A2 (fr) Matériaux de contact pour interrupteurs à vide
DE2920014C2 (fr)
EP0715765B1 (fr) Materiau de contact a base d'argent, utilisation d'un tel materiau dans un appareil de commutation en technique des courants forts et procede de fabrication de ce materiau
EP0369283B1 (fr) Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie, spécialement pour des contacteurs
DE2619459C3 (de) Sinterverbundwerkstoff als Kontaktwerkstoff für Vakuum-Mittelspannungs-Leistungsschalter
DE4343550A1 (de) Kontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik
WO1989010419A1 (fr) Matiere frittee pour contact electrique a base d'argent utilisee dans des appareils commutateurs d'energie, notamment plots de contact de commutateurs de basse tension
DE2202924C3 (de) Vakuumschalter
EP1043409B1 (fr) Matériau composite préparé par métallurgie des poudres
EP0448757A1 (fr) Matériel de contact en argent
DE3116442C2 (de) Sinterkontaktwerkstoff
EP0164664A2 (fr) Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie
DE1930859A1 (de) Pulvermetallzusammensetzungen und Verfahren zu ihrer Herstellung
DE10012250B4 (de) Kontaktwerkstoffe auf Basis Silber-Eisen-Kupfer
DE4205763A1 (de) Sinterkontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik
WO1997033288A1 (fr) Matiere de contact constituee d'argent et de composants actifs, piece moulee realisee dans cette matiere, et procede de production de cette piece moulee
DE2642690A1 (de) Sinterkontaktwerkstoff fuer elektrische kontakte

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DK JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE