Über das tribologische Verhalten galvanisch abgeschiedener PdNi-Legierungen. "Tribological behaviour of galvanically deposited PdNi-Alloys".

Publisher:
Grin Verlag
Publication Type:
Book
Citation:
2016
Issue Date:
2016-01-08
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Tribological behaviour of galvanically deposited Pd-Ni alloys Due to excellent chemical and electrical properties, palladium nickel (PdNi) alloys are considered as equivalent to the more expensive gold (Au) alloys which have been the traditionally preferred material choice for applications on electrical contacts of various electronic components. Based on palladium’s lower density as well as its lower market price compared to gold, Pd alloy combinations, especially PdNi alloys, can lead to considerable cost savings. In this study, the tribological behaviours of various PdNi alloys and sandwich systems consisting of PdNi 80/20 and Au- or AuCo- and AuNi coatings have been investigated using a pin-disc tribometer. Although the hardness of PdNi alloys is higher of the Au-Systems used in this study, however, they do also have higher friction coefficients. Coating PdNi layers with Au-, AuCo-, and AuNi-layers generally leads to reduction of the friction coefficients so far that in some cases friction coefficient levels similar to Au alloy systems can be obtained. Further reduction of friction coefficients and increases in wear resistance seem more eminent if the galvanic deposition of PdNi alloys is performed using a pulse plating method. Friction test results indicate that PdNi layers produced with a pulsating current have higher hardness and wear resistance values than those produced with a direct current.
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