Palladium-copper-silver-ruthenium alloy
The invention relates to a palladium-copper-silver alloy with palladium as the main component, wherein the palladium-copper-silver alloy has a weight ratio of palladium to copper of at least 1.05 and at most 1.6 and has a weight ratio of palladium to silver of at least 3 and at most 6, and wherein the palladium-copper-silver alloy contains more than 1 wt % and up to a maximum of 6 wt % of ruthenium, rhodium or ruthenium and rhodium and contains, as the remainder, palladium, copper and silver and at most 1 wt % of other metallic elements including impurities. The invention also relates to a wire, a strip or a probe needle made of such a palladium-copper-silver alloy and to the use of such a palladium-copper-silver alloy for testing electrical contacts or for making electrical contact or for producing a sliding contact.
1. A palladium-copper-silver alloy with palladium as the main component, wherein the palladium-copper-silver alloy
has a weight ratio of palladium to copper of at least 1.05 and at most 1.6,
has a weight ratio of palladium to silver of at least 3 and at most 6,
contains at least 1.5 wt % and up to a maximum of 6 wt % of ruthenium, or contains more than 1 wt % and up to a maximum of 6 wt % of rhodium or a mixture of ruthenium and rhodium, and
contains at most 1 wt % of other metallic elements including impurities.
2. The palladium-copper-silver alloy of claim 1 , wherein
the impurities in total have a proportion of at most 0.9 wt % in the palladium-copper-silver alloy.
3. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains up to 1 wt % of rhenium.
4. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains at least 45 wt % and at most 55 wt % of palladium, at least 30 wt % and at most 45 wt % of copper, at least 8 wt % and at most 15 wt % of silver.
5. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy is produced by melting metallurgy and is subsequently hardened by rolling and tempering.
6. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy has a hardness of at least 350 HV1 and/or has an electrical conductivity of at least 19% IACS (11*10 6 S/m) and/or has a breaking strength of at least 1300 MPa.
7. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains precipitates of ruthenium, rhodium, a mixture of ruthenium and rhodium, or a mixture of ruthenium and rhenium.
8. The palladium-copper-silver alloy of claim 7 , wherein
at least 90 vol % of the precipitates are arranged at grain boundaries of the palladium-copper-silver alloy.
9. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy has a weight ratio of palladium to copper of at least 1.2 and at most 1.55.
10. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy has a weight ratio of palladium to silver of at least 3.5 and at most 5.5.
11. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains at most 5 wt % of ruthenium, rhodium or a mixture of ruthenium and rhodium.
12. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains up to 3 wt % of rhodium or ruthenium.
13. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains up to 3 wt % of a combination of ruthenium and rhenium.
14. A wire, strip or probe needle consisting of or having a palladium-copper-silver alloy according to claim 1 .
15. A method, comprising:
testing electrical contacts, forming an electrical contact, or producing a sliding contact using a wire, strip or probe needle according to claim 14 .
16. A method, comprising:
testing electrical contacts, forming an electrical contact, or producing a sliding contact using a palladium-copper-silver alloy according to claim 1 .
17. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains between 0.1 wt % and 1 wt % of rhenium.
18. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains between 0.2 wt % and 0.8 wt % of rhenium.
19. The palladium-copper-silver alloy of claim 1 , wherein
the palladium-copper-silver alloy contains at least 51 wt % and at most 52 wt % of palladium, at least 36 wt % and at most 37 wt % of copper, at least 10 wt % and at most 11 wt % of silver, at least 1.5 wt % and at most 2 wt % of ruthenium, rhodium or a mixture of ruthenium and rhodium, and at most 0.5 wt % of other metallic elements.
20. A palladium-copper-silver alloy with palladium as the main component, wherein the palladium-copper-silver alloy
has a weight ratio of palladium to copper of at least 1.05 and at most 1.6,
has a weight ratio of palladium to silver of at least 3 and at most 6,
contains more than 1 wt % and up to a maximum of 6 wt % of rhodium or more than 1 wt % and up to a maximum of 6 wt % of a mixture of ruthenium and rhodium, and
contains at most 1 wt % of other metallic elements including impurities.