EP0027205A1 - Use of nickel-palladium sintered material for electrical relay contacts - Google Patents

Use of nickel-palladium sintered material for electrical relay contacts Download PDF

Info

Publication number
EP0027205A1
EP0027205A1 EP80105901A EP80105901A EP0027205A1 EP 0027205 A1 EP0027205 A1 EP 0027205A1 EP 80105901 A EP80105901 A EP 80105901A EP 80105901 A EP80105901 A EP 80105901A EP 0027205 A1 EP0027205 A1 EP 0027205A1
Authority
EP
European Patent Office
Prior art keywords
palladium
nickel
sintered material
relay contacts
electrical relay
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
Application number
EP80105901A
Other languages
German (de)
French (fr)
Other versions
EP0027205B1 (en
EP0027205B2 (en
Inventor
Horst Prof. Dr. Schreiner
Reinhard Tusche
Sjouke Zijlstra
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP0027205A1 publication Critical patent/EP0027205A1/en
Publication of EP0027205B1 publication Critical patent/EP0027205B1/en
Application granted granted Critical
Publication of EP0027205B2 publication Critical patent/EP0027205B2/en
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to the use of a sintered material, which consists of 80 to 100% nickel and 0 to 20% palladium, as a material for electrical relay contacts.
  • the object of the invention is to find a contact material for electrical relay contacts based on palladium-nickel, which, with a lower proportion of the expensive palladium compared to the known palladium-nickel alloys, has a high hardness and practically no increase in contact resistance under current loads shows practically no material migration for the aforementioned purpose.
  • This object is achieved according to the invention by using a sintered material which consists of 80 to 100% nickel and 0 to 20% palladium.
  • palladium-copper and palladium-silver alloys have been used as palladium alloys with a low material migration for relay contacts, although US Pat. No. 1,832,307 palladium-nickel alloys with a maximum of 70% nickel were known as possible contact materials .
  • Examples of particularly advantageous palladium-nickel sintered materials have been found to be compositions of 20% palladium and 80% nickel, 10% palladium and 90% nickel and 5% palladium and 95% nickel. Surprisingly, it has also been shown that the palladium can be completely replaced by nickel at correspondingly higher loads.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
  • Manufacture Of Switches (AREA)

Abstract

1. The use of a sintered material consisting of 80 to 100% nickel and 0 to 20% palladium, as a material for electrical relay contacts.

Description

Die Erfindung bezieht sich auf die Verwendung eines Sinterwerkstoffes, der aus 80 bis 100 % Nickel und 0 bis 20 % Palladium besteht, als Werkstoff für elektrische Relais-Kontakte.The invention relates to the use of a sintered material, which consists of 80 to 100% nickel and 0 to 20% palladium, as a material for electrical relay contacts.

Es sind bereits Silber-Palladium-Kontaktwerkstoffe mit 30 bis 50 % Palladium zur Verminderung der Bildung von sulfidhaltigen Reaktionsschichten an der Kontaktoberfläche bekannt. Durch die US-PS 1 832 307 sind Palladium-Nickel-Legierungen mit 30 bis 70% Palladium und 70 bis 30 % Nickel als Kontaktwerkstoffe für Relais bekannt geworden. Bei steigendem Nickel-Gehalt nimmt die Bildung von isolierenden Oxidschichten zu, so daß der maximale Nickel-Gehalt mit 70 % angegeben wird.Silver-palladium contact materials with 30 to 50% palladium to reduce the formation of sulfide-containing reaction layers on the contact surface are already known. US Pat. No. 1,832,307 has disclosed palladium-nickel alloys with 30 to 70% palladium and 70 to 30% nickel as contact materials for relays. With increasing nickel content, the formation of insulating oxide layers increases, so that the maximum nickel content is given as 70%.

Aufgabe der Erfindung ist es, einen Kontaktwerkstoff für elektrische Relais-Kontakte auf der Basis Palladium-Nickel zu finden, der mit einem geringeren Anteil des kostspieligen Palladiums gegenüber den bekannten Palladium-Nickel-Legierungen eine hohe Härte und bei Strombelastungen praktisch keine Zunahme des Kontaktwiderstandes und praktisch keine Materialwanderung zeigt für den vorgenannten Zweck.The object of the invention is to find a contact material for electrical relay contacts based on palladium-nickel, which, with a lower proportion of the expensive palladium compared to the known palladium-nickel alloys, has a high hardness and practically no increase in contact resistance under current loads shows practically no material migration for the aforementioned purpose.

Diese Aufgabe wird gemäß der Erfindung gelöst durch die Verwendung eines Sinterwerkstoffes, der aus 80 bis 100 % Nickel und 0 bis 20 % Palladium besteht.This object is achieved according to the invention by using a sintered material which consists of 80 to 100% nickel and 0 to 20% palladium.

Es hat sich überraschenderweise gezeigt, daß sich bei Relais bei Einschaltlasten mit Einschaltstromspitzen bis 35 A Palladium-Nickel-Werkstoffe.mit Nickel-Gehalten von 80 bis 100 % als Kontaktwerkstoffe sehr gut eignen.It has surprisingly been found that in the case of relays with switch-on loads with inrush current peaks up to 35 A, palladium-nickel materials with nickel contents of 80 to 100% are very suitable as contact materials.

Bisher wurden als Palladium-Legierungen mit einer geringen Materialwanderung für Relais-Kontakte Palladium-Kupfer- und Palladium-Silber-Legierungen verwendet, obwohl durch die US-PS 1 832 307 Palladium-Nickel-Legierungen mit maximal 70 % Nickel als mögliche Kontaktwerkstoffe bekannt waren.Hitherto, palladium-copper and palladium-silver alloys have been used as palladium alloys with a low material migration for relay contacts, although US Pat. No. 1,832,307 palladium-nickel alloys with a maximum of 70% nickel were known as possible contact materials .

Palladium-Kupfer der Zusammensetzung 85 % Palladium und 15 % Kupfer zeigt z.B. unter einer Lampenlast i = 4 A, bei Einschaltstromspitzen bis 35 A eine geringe, flächenhafte Materialwanderung und verhältnismäßig niedrigen Kontaktwiderstand. Bei Palladium-Kontaktwerkstoffen mit höherem Kupfer-Gehalt nehmen die Materialwanderung und auch der Kontaktwiderstand unerwünscht zu.Palladium-copper of the composition 85% palladium and 15% copper shows e.g. under a lamp load i = 4 A, with inrush current peaks up to 35 A, a small, extensive material migration and relatively low contact resistance. In the case of palladium contact materials with a higher copper content, the material migration and also the contact resistance increase undesirably.

Eine derartige Zunahme des Kontaktwiderstandes und der Materialwanderung wurden bei Palladium-Nickel-Werkstoffen gemäß der Erfindung auch bei sehr hohen Nickel-Gehalten nicht beobachtet. Etwaige isolierende Oxidschichten werden durch die Einschaltlast weggebrannt und der Kontaktwiderstand bleibt dadurch über die ganze Schaltzahl konstant niedrig.Such an increase in contact resistance and material migration have been observed in the case of palladium-nickel materials according to the invention even at very high nickel contents not observed. Any insulating oxide layers are burned away by the switch-on load and the contact resistance remains constantly low over the entire number of switching operations.

Beispiele für besonders vorteilhafte Palladium-Nickel-Sinterwerkstoffe sind Zusammensetzungen 20 % Palladium und 80 % Nickel, 10 % Palladium und 90 % Nickel sowie 5 % Palladium und 95 % Nickel erwiesen. Es hat sich überraschenderweise auch gezeigt, daß bei entsprechend höheren Belastungen das Palladium vollkommen durch Nickel ersetzt werden kann.Examples of particularly advantageous palladium-nickel sintered materials have been found to be compositions of 20% palladium and 80% nickel, 10% palladium and 90% nickel and 5% palladium and 95% nickel. Surprisingly, it has also been shown that the palladium can be completely replaced by nickel at correspondingly higher loads.

Claims (5)

1. Verwendung eines Sinterwerkstoffes, der aus 80 bis 100 % Nickel und 0 bis 20 % Palladium besteht, als Werkstoff für elektrische Relais-Kontakte.1. Use of a sintered material, which consists of 80 to 100% nickel and 0 to 20% palladium, as a material for electrical relay contacts. 2. Verwendung eines Sinterwerkstoffes gemäß Anspruch 1 für den dort angegebenen Zweck, der aus 20 % Palladium und 80% Nickel besteht.2. Use of a sintered material according to claim 1 for the purpose specified there, which consists of 20% palladium and 80% nickel. 3. Verwendung eines Sinterwerkstoffes gemäß Anspruch 1 für den dort angegebenen Zweck, der aus 10 % Palladium und 90 % Nickel besteht.3. Use of a sintered material according to claim 1 for the purpose specified there, which consists of 10% palladium and 90% nickel. 4. Verwendung eines Sinterwerkstoffes gemäß Anspruch 1 für den dort angegebenen Zweck, der aus 5 % Palladium und 95 % Nickel besteht.4. Use of a sintered material according to claim 1 for the purpose specified therein, which consists of 5% palladium and 95% nickel. 5. Verwendung eines Sinterwerkstoffes gemäß Anspruch 1 für den dort angegebenen Zweck, der aus reinem Nickel besteht.5. Use of a sintered material according to claim 1 for the purpose specified therein, which consists of pure nickel.
EP80105901A 1979-10-12 1980-09-29 Use of nickel-palladium sintered material for electrical relay contacts Expired EP0027205B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2941465 1979-10-12
DE19792941465 DE2941465A1 (en) 1979-10-12 1979-10-12 USE OF NICKEL PALLADIUM SINTERING MATERIALS FOR ELECTRICAL RELAY CONTACTS

Publications (3)

Publication Number Publication Date
EP0027205A1 true EP0027205A1 (en) 1981-04-22
EP0027205B1 EP0027205B1 (en) 1984-02-22
EP0027205B2 EP0027205B2 (en) 1987-01-21

Family

ID=6083391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105901A Expired EP0027205B2 (en) 1979-10-12 1980-09-29 Use of nickel-palladium sintered material for electrical relay contacts

Country Status (3)

Country Link
EP (1) EP0027205B2 (en)
JP (1) JPS5665957A (en)
DE (2) DE2941465A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247318A1 (en) * 1986-04-17 1987-12-02 International Business Machines Corporation Alloy for electrical contacts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018109262B4 (en) * 2018-04-18 2021-05-12 Seg Automotive Germany Gmbh Method for producing a component in a circuit in a starter relay for a starting device for an internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832307A (en) * 1925-07-11 1931-11-17 Western Electric Co Alloy for electrical contacts
DE610260C (en) * 1929-03-05 1935-03-09 Siemens Schuckertwerke Akt Ges Contact piece for switch, especially for self switch
DE1945592A1 (en) * 1969-05-01 1970-11-12 Byrne William Ralph Electrical contact piece
DE1690081A1 (en) * 1967-11-02 1971-04-22 Sachsenwerk Licht & Kraft Ag Process for contacts to be coated only partially with precious metal or nickel in a purely chemical or electrochemical manner
DE1959945A1 (en) * 1969-11-28 1971-06-03 Siemens Ag Wetted switch contacts for use in gas - filled devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832307A (en) * 1925-07-11 1931-11-17 Western Electric Co Alloy for electrical contacts
DE610260C (en) * 1929-03-05 1935-03-09 Siemens Schuckertwerke Akt Ges Contact piece for switch, especially for self switch
DE1690081A1 (en) * 1967-11-02 1971-04-22 Sachsenwerk Licht & Kraft Ag Process for contacts to be coated only partially with precious metal or nickel in a purely chemical or electrochemical manner
DE1945592A1 (en) * 1969-05-01 1970-11-12 Byrne William Ralph Electrical contact piece
DE1959945A1 (en) * 1969-11-28 1971-06-03 Siemens Ag Wetted switch contacts for use in gas - filled devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247318A1 (en) * 1986-04-17 1987-12-02 International Business Machines Corporation Alloy for electrical contacts

Also Published As

Publication number Publication date
JPS5665957A (en) 1981-06-04
DE3066704D1 (en) 1984-03-29
DE2941465A1 (en) 1981-04-23
EP0027205B1 (en) 1984-02-22
EP0027205B2 (en) 1987-01-21

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