The Materials Properties and Contact Reliability of Palladium-cobalt

Palladium and its alloys have become the standard precious metal finishes for high reliability connectors. While pure palladium is preferred for high temperature automotive applications, palladium-nickel has become the preferred finish for ambient temperature, high insertion applications such as edg...

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Bibliographic Details
Published in:Transactions of the Institute of Metal Finishing 1999, Vol.77 (4), p.164-168
Main Authors: Abys, J.A., Kudrak, E.J., Fan, C.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metallic coatings
Metals. Metallurgy
Production techniques
Surface treatment
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Summary:Palladium and its alloys have become the standard precious metal finishes for high reliability connectors. While pure palladium is preferred for high temperature automotive applications, palladium-nickel has become the preferred finish for ambient temperature, high insertion applications such as edge card connectors. However, palladium-nickel, when plated over nickel, is not without its problems. Quality control issues related to the measurement of composition and thickness by simple, non-destructive XRF analysis remain a significant concern. Palladium-cobalt does not suffer from this shortcoming, and furthermore has been found to outperform palladium-nickel for high durability applications. In this study, the metallurgical structure of palladium-nickel and palladium-cobalt electrodeposits is characterized by X-ray diffraction and electron microscopy. In addition, the hardness, porosity, wear performance and thermal stability, among other properties, are discussed.
ISSN:0020-2967
1745-9192
DOI:10.1080/00202967.1999.11871274