Abstract: A strip-shaped sandwich composite material for producing probe needles, wherein an inner core layer is arranged between two outer cover layers, wherein the inner core layer consists of a palladium alloy comprising at least 30 wt. % palladium or of a platinum alloy comprising at least 30 wt. % platinum, and wherein the two outer cover layers consist of a precipitation-hardened and/or dispersion-hardened copper alloy comprising at least 90 wt. % copper and/or silver alloy comprising at least 70 wt. % silver. The invention also relates to a probe needle, a bonding strip, a probe needle array and a method for producing a composite material.

Abstract: 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.

Abstract: A palladium-copper-silver alloy consisting of 40 to 58% by weight of palladium, 25 to 42% by weight of copper, 6 to 20% by weight of silver, optionally up to 6% by weight of at least one element from the group ruthenium, rhodium, and rhenium, and up to 1% by weight of impurities, wherein the palladium-copper-silver alloy contains a crystalline phase with a B2 crystal structure and has 0% by volume to 10% by volume of precipitates of silver, palladium, and binary silver-palladium compounds. The invention also relates to a molded body, 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 electrical contacting or for the production of a sliding contact. The invention also relates to a method for producing a palladium-copper-silver alloy.

Abstract: 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.