EP0247541A1 - Elément de contact pour contacts interrupteurs électriques - Google Patents

Elément de contact pour contacts interrupteurs électriques Download PDF

Info

Publication number: EP0247541A1
Authority: EP; European Patent Office
Prior art keywords: weight; palladium; contact element; alloy; element according
Prior art date: 1986-05-26
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

EP87107505A

Other languages

German (de)

English (en)

Other versions

EP0247541B1 (fr

Inventor

Klaus-Dieter Heppner

Josef Dr. Dipl.-Phys. Weiser

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

Siemens Corp

Original Assignee

Siemens AG

Siemens Corp

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.)

1986-05-26

Filing date

1987-05-22

Publication date

1987-12-02

1987-05-22 Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG

1987-12-02 Publication of EP0247541A1 publication Critical patent/EP0247541A1/fr

1990-10-24 Application granted granted Critical

1990-10-24 Publication of EP0247541B1 publication Critical patent/EP0247541B1/fr

2007-05-22 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 27
KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 16
239000010949 copper Substances 0.000 claims abstract description 12
229910052737 gold Inorganic materials 0.000 claims abstract description 12
239000010931 gold Substances 0.000 claims abstract description 12
229910052759 nickel Inorganic materials 0.000 claims abstract description 12
229910045601 alloy Inorganic materials 0.000 claims abstract description 11
239000000956 alloy Substances 0.000 claims abstract description 11
PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 9
229910052763 palladium Inorganic materials 0.000 claims abstract description 8
229910001252 Pd alloy Inorganic materials 0.000 claims abstract description 7
229910017052 cobalt Inorganic materials 0.000 claims abstract description 7
239000010941 cobalt Substances 0.000 claims abstract description 7
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 7
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
229910052802 copper Inorganic materials 0.000 claims abstract description 6
229910052709 silver Inorganic materials 0.000 claims abstract description 6
239000004332 silver Substances 0.000 claims abstract description 6
SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 claims abstract description 3
229910052750 molybdenum Inorganic materials 0.000 claims description 6
229910052721 tungsten Inorganic materials 0.000 claims description 6
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
239000011733 molybdenum Substances 0.000 claims description 5
WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
239000010937 tungsten Substances 0.000 claims description 5
239000010953 base metal Substances 0.000 claims description 3
239000000463 material Substances 0.000 claims description 3
229910000881 Cu alloy Inorganic materials 0.000 claims 2
229910000531 Co alloy Inorganic materials 0.000 claims 1
229910000990 Ni alloy Inorganic materials 0.000 claims 1
239000010970 precious metal Substances 0.000 abstract description 6
238000009713 electroplating Methods 0.000 description 4
BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
229910018054 Ni-Cu Inorganic materials 0.000 description 2
229910018481 Ni—Cu Inorganic materials 0.000 description 2
229910002668 Pd-Cu Inorganic materials 0.000 description 2
229910001080 W alloy Inorganic materials 0.000 description 2
238000000576 coating method Methods 0.000 description 2
238000000034 method Methods 0.000 description 2
229910000510 noble metal Inorganic materials 0.000 description 2
229910052703 rhodium Inorganic materials 0.000 description 2
239000010948 rhodium Substances 0.000 description 2
MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
229910001316 Ag alloy Inorganic materials 0.000 description 1
229910001020 Au alloy Inorganic materials 0.000 description 1
206010009866 Cold sweat Diseases 0.000 description 1
229910001182 Mo alloy Inorganic materials 0.000 description 1
229910003296 Ni-Mo Inorganic materials 0.000 description 1
229910021069 Pd—Co Inorganic materials 0.000 description 1
238000005299 abrasion Methods 0.000 description 1
239000011248 coating agent Substances 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
239000000203 mixture Substances 0.000 description 1

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

Definitions

the invention relates to a contact element for electrical switch contacts, in particular a contact tongue for electromagnetic relays, a two-layer contact pad being galvanically applied to a base made of base metal and at least one of the layers containing palladium.
a contact element in which a silver layer and a rhodium layer are applied over a nickel layer. Such contact surfaces have a low tendency to cold sweat.
the same document also describes the use of gold contact layers with a rhodium coating as known. In general, however, previously known multilayer coatings made of precious metals are either relatively expensive or can only be used in a limited range.
palladium for switch contacts is also known (electronics 15/1981, pages 53 to 61). Galvanic palladium layers of 1 to 2 ⁇ m are described as particularly abrasion-resistant. It is also pointed out that layers of palladium are mostly covered with a layer of gold. Such layers of pure precious metals, such as palladium and gold, are very expensive. In addition, alloys of palladium for contact purposes, for example PdCu or AgPd30, are only known in the form of contact profiles, which cannot be used in all cases because of their material thickness. In addition, such contact profiles with high proportions of precious metals are also expensive.
the object of the invention is to provide a switching contact of the type mentioned at the outset, which has the smallest possible proportion of expensive precious metals, but can be used over the widest possible range of switching powers.
the contact should therefore be reliable and can be used with a long service life both with very small and with very high switching currents and switching voltages.
this object is achieved with a contact element of the type mentioned at the outset in that the inner layer has a thickness of 3 to 5 ⁇ m and is formed from an alloy of palladium and an additional component, the additional component accounting for a proportion of 10 to 50% by weight.
the inner layer has a thickness of 3 to 5 ⁇ m and is formed from an alloy of palladium and an additional component, the additional component accounting for a proportion of 10 to 50% by weight.
the outer layer has a thickness of 0.1 to 1 microns and an alloy of palladium-silver or palladium-gold with a silver or gold content of 10 to 40% by weight is formed.
the contact element according to the invention thus has a two-layer contact surface with two different palladium alloys, the base layer or load layer being formed from an alloy of palladium and a base metal, while the outer conductive layer is formed from an alloy of palladium and a further noble metal to a much smaller thickness .
the individual contact layers can be applied in the specified, relatively small layer thicknesses with good quality, so that the total consumption of precious metal, in particular that of gold, is relatively low.
switching currents from a few ⁇ A to about 5 A and switching voltages from a few ⁇ V to about 150 V can be operated correctly and with a large number of switching cycles.
the inner layer is expediently designed as a Pd-Ni layer with a Ni content of 10 to 50%, preferably of 20 to 30%; In another expedient form of application, the inner layer is designed as Pd-Co with a Co content of 10 to 40%, preferably about 25%.
a further embodiment contains an inner layer made of a Pd-Cu layer with a Cu content of 10 to 40% by weight, preferably approximately 20% by weight.
three-material alloys are also suitable for the inner contact layer, for example Pd-Ni-Cu with 10 to 40% by weight Ni-Cu, preferably 20% by weight Ni + 5% by weight Cu.
these three-component alloys can also contain proportions of tungsten or molybdenum.
a Pd-Ni-W alloy with 10 to 40% by weight Ni + W, preferably about 15% Ni + 10% W or a Pd-Ni-Mo alloy with 10 to 40% by weight can be used for the inner contact layer.
Ni + Mo preferably about 15% Ni + about 10% Mo can be used.
a similar alloy composition can also be provided with cobalt, ie a Pd-Cu-W alloy with 10 to 40% by weight Cu + W, preferably about 15% by weight Cu + about 10% by weight W or a Pd-Cu -Mo alloy with 10 to 40% by weight Cu + Mo, preferably approximately 15% by weight Cu + approximately 10% by weight Mo.
cobalt ie a Pd-Cu-W alloy with 10 to 40% by weight Cu + W, preferably about 15% by weight Cu + about 10% by weight W or a Pd-Cu -Mo alloy with 10 to 40% by weight Cu + Mo, preferably approximately 15% by weight Cu + approximately 10% by weight Mo.
the outer layer or conductive layer has a thickness of between 0.1 and 1 ⁇ m, preferably a thickness of about 0.5 ⁇ m being used.
This outer layer preferably contains about 30% silver as Pd-Ag alloy or preferably 20% gold as Pd-Au alloy.
contact layers are applied galvanically, with selective electroplating processes preferably being used, for example under the terms nozzle electroplating or jetplating, brush electroplating and laser electroplating are known. With these methods, the contact layers are applied only where they are needed, so that a particularly economical use of the noble metals is possible in this way.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Composite Materials (AREA)
Materials Engineering (AREA)
Contacts (AREA)

EP87107505A 1986-05-26 1987-05-22 Elément de contact pour contacts interrupteurs électriques Expired - Lifetime EP0247541B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3617627		1986-05-26
DE3617627		1986-05-26

Publications (2)

Publication Number	Publication Date
EP0247541A1 true EP0247541A1 (fr)	1987-12-02
EP0247541B1 EP0247541B1 (fr)	1990-10-24

Family

ID=6301641

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP87107505A Expired - Lifetime EP0247541B1 (fr)	1986-05-26	1987-05-22	Elément de contact pour contacts interrupteurs électriques

Country Status (2)

Country	Link
EP (1)	EP0247541B1 (fr)
DE (1)	DE3765696D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5438175A (en) *	1992-12-22	1995-08-01	W. C. Heraeus Gmbh	Electric outlet element having double flash
EP2216796A1 (fr) *	2009-02-05	2010-08-11	Delphi Technologies, Inc.	Ensemble de contact coulissant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US8246808B2 (en) *	2008-08-08	2012-08-21	GM Global Technology Operations LLC	Selective electrochemical deposition of conductive coatings on fuel cell bipolar plates

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2033870A1 (de) *	1969-07-02	1971-02-25	Matsushita Electric Ind Co Ltd	Verfahren zur Herstellung eines elektn sehen Kontaktmatenals
DE2540944A1 (de) *	1975-09-13	1977-03-24	Heraeus Gmbh W C	Elektrischer steckkontakt
DE2540999A1 (de) *	1975-09-13	1977-03-24	Heraeus Gmbh W C	Elektrischer steckkontakt

1987
- 1987-05-22 EP EP87107505A patent/EP0247541B1/fr not_active Expired - Lifetime
- 1987-05-22 DE DE8787107505T patent/DE3765696D1/de not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2033870A1 (de) *	1969-07-02	1971-02-25	Matsushita Electric Ind Co Ltd	Verfahren zur Herstellung eines elektn sehen Kontaktmatenals
DE2540944A1 (de) *	1975-09-13	1977-03-24	Heraeus Gmbh W C	Elektrischer steckkontakt
DE2540999A1 (de) *	1975-09-13	1977-03-24	Heraeus Gmbh W C	Elektrischer steckkontakt

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5438175A (en) *	1992-12-22	1995-08-01	W. C. Heraeus Gmbh	Electric outlet element having double flash
EP2216796A1 (fr) *	2009-02-05	2010-08-11	Delphi Technologies, Inc.	Ensemble de contact coulissant
WO2010089296A1 (fr) *	2009-02-05	2010-08-12	Delphi Technologies, Inc.	Ensemble à contact glissant

Also Published As

Publication number	Publication date
DE3765696D1 (de)	1990-11-29
EP0247541B1 (fr)	1990-10-24

Legal Events

Date	Code	Title	Description
1987-10-17	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1987-12-02	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI SE
1988-03-16	17P	Request for examination filed	Effective date: 19880111
1990-04-04	17Q	First examination report despatched	Effective date: 19900220
1990-09-08	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1990-10-24	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): CH DE FR GB IT LI SE
1990-10-24	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Effective date: 19901024
1990-11-29	REF	Corresponds to:	Ref document number: 3765696 Country of ref document: DE Date of ref document: 19901129
1990-12-14	ET	Fr: translation filed
1991-01-09	ITF	It: translation for a ep patent filed
1991-02-06	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1991-05-31	ITTA	It: last paid annual fee
1991-08-24	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1991-08-24	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1991-10-16	26N	No opposition filed
1996-04-19	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19960419 Year of fee payment: 10
1996-05-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19960523 Year of fee payment: 10
1996-08-21	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: CH Payment date: 19960821 Year of fee payment: 10
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2005-05-22	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050522

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