EP0027205B1 - Use of nickel-palladium sintered material for electrical relay contacts - Google Patents
Use of nickel-palladium sintered material for electrical relay contacts Download PDFInfo
- Publication number
- EP0027205B1 EP0027205B1 EP80105901A EP80105901A EP0027205B1 EP 0027205 B1 EP0027205 B1 EP 0027205B1 EP 80105901 A EP80105901 A EP 80105901A EP 80105901 A EP80105901 A EP 80105901A EP 0027205 B1 EP0027205 B1 EP 0027205B1
- 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.)
- Expired
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
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 smaller proportion of the expensive palladium compared to the known palladium-nickel alloys, has a high hardness and practically no increase in the contact resistance and 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.
- 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.
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-Paladium-Kontaktwerkstoffe mit 30 bis 50% Palladium zur Verminderung der Bildung von sulfidhaltigen Reaktionsschichten an der Kontaktoberfläche bekannt. Durch die US-A-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 smaller proportion of the expensive palladium compared to the known palladium-nickel alloys, has a high hardness and practically no increase in the contact resistance and 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 of 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 RelaisKontakt Palladium-Kupfer- und Palladium-Silber-Legierungen verwendet, obwohl durch die US-A-1 832 307 Palladium-Nickel-Legierungen mit maximal 70% Nickel als mögliche Kontaktwerkstoffe bekannt waren.So far, palladium-copper and palladium-silver alloys have been used as palladium alloys with a low material migration for relay contact, although US Pat. No. 1,832,307 disclosed palladium-nickel alloys with a maximum of 70% nickel 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. B. 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. With 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 were not observed in the case of palladium-nickel materials according to the invention, even at very high nickel contents. 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)
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 EP0027205A1 (en) | 1981-04-22 |
| EP0027205B1 true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636251A (en) * | 1986-04-17 | 1987-01-13 | International Business Machines Corporation | Materials for electrical contact |
| 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 |
Family Cites Families (3)
| 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 |
| DE1690081B2 (en) * | 1967-11-02 | 1972-08-17 | Sachsenwerk Licht- und Kraft AG, 8000 München | PROCEDURE FOR CONTACTS TO BE PLATED ONLY IN PART WITH PRECIOUS METAL OR NICKEL |
-
1979
- 1979-10-12 DE DE19792941465 patent/DE2941465A1/en not_active Withdrawn
-
1980
- 1980-09-29 EP EP80105901A patent/EP0027205B2/en not_active Expired
- 1980-09-29 DE DE8080105901T patent/DE3066704D1/en not_active Expired
- 1980-10-13 JP JP14284080A patent/JPS5665957A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE3066704D1 (en) | 1984-03-29 |
| DE2941465A1 (en) | 1981-04-23 |
| JPS5665957A (en) | 1981-06-04 |
| EP0027205A1 (en) | 1981-04-22 |
| EP0027205B2 (en) | 1987-01-21 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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