EP1535292B1 - Kontaktstück aus wolfram mit einer korrosionshemmenden schicht aus zinn - Google Patents
Kontaktstück aus wolfram mit einer korrosionshemmenden schicht aus zinn Download PDFInfo
- Publication number
- EP1535292B1 EP1535292B1 EP04728163A EP04728163A EP1535292B1 EP 1535292 B1 EP1535292 B1 EP 1535292B1 EP 04728163 A EP04728163 A EP 04728163A EP 04728163 A EP04728163 A EP 04728163A EP 1535292 B1 EP1535292 B1 EP 1535292B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tungsten
- tin
- layer
- contact
- contact piece
- 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 - Lifetime
Links
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 38
- 239000010937 tungsten Substances 0.000 title claims abstract description 38
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims description 20
- 230000007797 corrosion Effects 0.000 title abstract description 15
- 238000005260 corrosion Methods 0.000 title abstract description 15
- 229910000679 solder Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000009713 electroplating Methods 0.000 claims 1
- 229910000510 noble metal Inorganic materials 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 239000010949 copper Substances 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
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
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
Definitions
- Tungsten as a contact pad in electromechanical switchgear is due its extraordinary erosion resistance of all refractory metals the metal of choice when it comes to fast switching associated with significant Sparking is possible.
- tungsten contact pieces in the various switching devices such as vehicle breakers, car horns and relays be used without interference.
- the contact piece is usually as a rivet with a Wolframide soldered as a contact pad on a rivet-shaped carrier Soft iron or copper made (see Fig.1).
- Tungsten is not a precious metal. When switching under air is with oxidic Cover layers to be expected. Corrosion phenomena on tungsten contact pieces have been known as a problem for over 50 years and interfere with unfavorable Switching conditions the universal scope of tungsten as Contact material. In dry air, even in a hot environment (desert climate) remains the tungsten contact for a long time unimpaired and fully functional. But kick Adding moisture (tropical climate), rapid corrosion takes place of the unprotected Wolfram.
- Tungsten contact pairings tend to increase in warm and humid climates To fail. This is observed in a statistically conspicuous way with horn contacts, if, for example, before the sales type of a new car type a certain Number of cars on heap is produced, there may be months under Warm humid conditions are available before they go to the dealer for delivery reach.
- a process well known to those skilled in the art is the coating of the complete Contact rivet before installation in the switching device with a thin nickel layer. Due to the passivation of the nickel, the contact remains uncovered Undamaged nickel layer long time bright and free of corrosion layers.
- Ni-layer is the horn manufacturer by the necessary honking of the new horn on the switching surface partly destroyed The protective effect of the Ni-layer is greatly degraded. In the field trial is a positive effect of a Nickel plating is no longer clear.
- US-A-2,547,947 describes electrical contact arrangements for Ignition systems of internal combustion engines, in which the movable Part consists of a steel or iron arm, on which a tungsten contact disk plotted or - welded. To obstruct the Deformation of dark colored deposits on the tungsten surface if the arrangement is plated with nickel, chromium, cadmium or zinc, the contact surface and its edges after the Plating to remove plated metal from these Areas of the tungsten surface were polished.
- Japanese Patent Publication 20128/1974 discloses the use of Graphite powder as carburizing agent.
- German Offenlegungsschrift 3232097 A1 discloses the use of propane as carburizing agent in a protective gas furnace. An impairment of the solder side of Tungsten contact pad by simultaneous unwanted carburization and a Impairment of OfenMapleiter is not excluded.
- German Offenlegungsschrift 3626144 A1 discloses contact, a silver base, an intermediate layer of tin and an outer layer from tungsten.
- the invention is therefore based on the object, one of a Cu or Ag brazing Tungsten pad soldered to a metallic support Contact piece to develop under corrosive conditions, especially under the Exposure to a warm and humid climate does not affect the Show switching properties.
- the invention thus relates to a contact piece with tungsten support (1), the Lot (2) and carrier (3) coated with a thin layer (4) of tin is.
- Preferred Au exitsformen of the rivet are the subject of claims 2 to 3.
- a method for producing the contact piece is in claims 4 to 7 described.
- Tin is only slightly in the voltage series in contrast to the less noble metals Ni, Cu, Cd and Zu proposed in US Pat. No. 2,547,547, which are particularly suitable proved. It should be emphasized in a galvanic deposition of Sn, that it This is a very cost effective method with an aesthetic appealing result.
- Form nobler elements such as copper (as Cu solder) or Ag (as electrolytic Cover) with W a local element, preferably the tungsten of the W contact pad as a so-called sacrificial anode in solution.
- a local element formation is Ag as a protective layer counterproductive and copper as adjacent solder layer even conducive to corrosion. The same is to be assumed for the by potential shift cathodic, that is nobler behaving Ni.
- Humidity sets On a separate porcelain carrier rivets, as they correspond to the state of the art - added without reference additional galvanic base metal layer - as a reference.
- the desiccator is heated to a constant 50 ° C in a climate controlled cabinet for 48 h.
- FIGS. 2 and 4 The result after 48h is shown in FIGS. 2 and 4.
- the galvanic post-treated rivets show in comparison to the non-corroded standard (FIG. only slight tarnish on the contact surface.
- the W surface with thick greenish-brown Crusts that extend from the circumference of the Cu solder into the tungsten surface partially reach to the middle, covered.
- These crusts are presumably inorganic salts of copper and tungsten. Are they? between the closed contacts of a horn, this leads to the increase of the Contact resistance and therefore to the failure of the horn.
Landscapes
- Contacts (AREA)
- Electroplating Methods And Accessories (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Details Of Resistors (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04728163T PL1535292T3 (pl) | 2003-04-22 | 2004-04-19 | Element stykowy z wolframu z powstrzymującą korozję warstwą cyny |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10318223 | 2003-04-22 | ||
DE10318223A DE10318223A1 (de) | 2003-04-22 | 2003-04-22 | Kontaktstück aus Wolfram mit einer korrosionshemmenden Schicht aus Unedelmetall |
PCT/EP2004/004153 WO2004095485A1 (de) | 2003-04-22 | 2004-04-19 | Kontaktstück aus wolfram mit einer korrosionshemmenden schicht aus unedelmetall |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1535292A1 EP1535292A1 (de) | 2005-06-01 |
EP1535292B1 true EP1535292B1 (de) | 2005-11-30 |
Family
ID=33304876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04728163A Expired - Lifetime EP1535292B1 (de) | 2003-04-22 | 2004-04-19 | Kontaktstück aus wolfram mit einer korrosionshemmenden schicht aus zinn |
Country Status (11)
Country | Link |
---|---|
US (1) | US7339127B2 (es) |
EP (1) | EP1535292B1 (es) |
JP (1) | JP2007535092A (es) |
KR (1) | KR20060018215A (es) |
CN (1) | CN1777966A (es) |
AT (1) | ATE311657T1 (es) |
BR (1) | BRPI0409636A (es) |
DE (2) | DE10318223A1 (es) |
ES (1) | ES2253731T3 (es) |
PL (1) | PL1535292T3 (es) |
WO (1) | WO2004095485A1 (es) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006064558A1 (ja) * | 2004-12-15 | 2006-06-22 | Fujitsu Limited | 接触子部材、コンタクタ及び接触方法 |
DE102005024973A1 (de) * | 2005-05-25 | 2006-11-30 | Siemens Ag | Schaltstück, Niederspannungs-Leistungsschalter mit einem Schaltstück sowie Verfahren zur Herstellung eines Schaltstücks |
JP5274046B2 (ja) * | 2008-02-21 | 2013-08-28 | 三洋電機株式会社 | 車両用の電源装置 |
DE102008060971B3 (de) * | 2008-12-06 | 2010-07-08 | Ami Doduco Gmbh | Kontaktteil für Hochspannungsschalter |
FR2997222B1 (fr) | 2012-10-19 | 2015-01-16 | Alstom Technology Ltd | Dispositif d'etablissement et/ou de coupure de courant a contacts permanents a usure reduite |
WO2015019424A1 (ja) * | 2013-08-06 | 2015-02-12 | 株式会社徳力本店 | 電気接点および接触子 |
US10366955B2 (en) | 2017-01-25 | 2019-07-30 | Samsung Electronics Co., Ltd. | Semiconductor device including conductive structure having nucleation structure and method of forming the same |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1264685A (en) * | 1916-09-30 | 1918-04-30 | Giuseppe Alberto Rignon | Method of making electrical contacts. |
US2216654A (en) * | 1937-07-27 | 1940-10-01 | Arrow Hart & Hegeman Electric | Electric switch contact |
US2547947A (en) * | 1946-06-17 | 1951-04-10 | Fansteel Metallurgical Corp | Contact assembly |
US3519543A (en) | 1967-10-27 | 1970-07-07 | Talon Inc | Process for electrolytically cleaning and polishing electrical contacts |
US3697389A (en) * | 1968-01-02 | 1972-10-10 | Amp Inc | Method of forming electrical contact materials |
US3852879A (en) | 1968-09-25 | 1974-12-10 | Mallory & Co Inc P R | Electrical contact material |
US3569653A (en) * | 1969-01-31 | 1971-03-09 | Engelhard Min & Chem | Electrical contact and contact assembly |
US3562467A (en) * | 1969-06-04 | 1971-02-09 | Engelhard Min & Chem | Electrical contact |
CH529435A (de) * | 1972-03-17 | 1972-10-15 | Sprecher & Schuh Ag | Verfahren zur Herstellung eines Vakuumschalterkontaktes |
JPS50111078A (es) | 1974-02-20 | 1975-09-01 | ||
GB1517702A (en) * | 1974-09-19 | 1978-07-12 | Fujitsu Ltd | Electrical contact |
JPS58115728A (ja) | 1981-12-28 | 1983-07-09 | 三菱電機株式会社 | 真空しや断器用接点 |
DE3232097C2 (de) | 1982-08-28 | 1984-08-02 | Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim | Verfahren zur Erzeugung einer korrosionshemmenden Deckschicht auf Kontaktstücken aus Wolfram und nach diesem Verfahren hergestelltes Kontaktstück |
EP0172411B1 (de) * | 1984-07-30 | 1988-10-26 | Siemens Aktiengesellschaft | Vakuumschütz mit Kontaktstücken aus CuCr und Verfahren zur Herstellung dieser Kontaktstücke |
DE3509039A1 (de) * | 1985-03-14 | 1986-09-18 | W.C. Heraeus Gmbh, 6450 Hanau | Verbundwerkstoff fuer elektrische kontakte und verfahren zu seiner herstellung |
US6441315B1 (en) * | 1998-11-10 | 2002-08-27 | Formfactor, Inc. | Contact structures with blades having a wiping motion |
-
2003
- 2003-04-22 DE DE10318223A patent/DE10318223A1/de not_active Ceased
-
2004
- 2004-04-19 CN CNA2004800108627A patent/CN1777966A/zh active Pending
- 2004-04-19 AT AT04728163T patent/ATE311657T1/de not_active IP Right Cessation
- 2004-04-19 DE DE502004000154T patent/DE502004000154D1/de not_active Expired - Lifetime
- 2004-04-19 ES ES04728163T patent/ES2253731T3/es not_active Expired - Lifetime
- 2004-04-19 EP EP04728163A patent/EP1535292B1/de not_active Expired - Lifetime
- 2004-04-19 KR KR1020057019886A patent/KR20060018215A/ko not_active Application Discontinuation
- 2004-04-19 PL PL04728163T patent/PL1535292T3/pl unknown
- 2004-04-19 US US10/554,175 patent/US7339127B2/en not_active Expired - Fee Related
- 2004-04-19 WO PCT/EP2004/004153 patent/WO2004095485A1/de active Application Filing
- 2004-04-19 BR BRPI0409636-3A patent/BRPI0409636A/pt not_active Application Discontinuation
- 2004-04-19 JP JP2006505193A patent/JP2007535092A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2004095485A1 (de) | 2004-11-04 |
ATE311657T1 (de) | 2005-12-15 |
JP2007535092A (ja) | 2007-11-29 |
KR20060018215A (ko) | 2006-02-28 |
CN1777966A (zh) | 2006-05-24 |
PL1535292T3 (pl) | 2006-05-31 |
DE502004000154D1 (de) | 2006-01-05 |
BRPI0409636A (pt) | 2006-04-25 |
ES2253731T3 (es) | 2006-06-01 |
DE10318223A1 (de) | 2004-12-02 |
US20060278507A1 (en) | 2006-12-14 |
EP1535292A1 (de) | 2005-06-01 |
US7339127B2 (en) | 2008-03-04 |
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