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Open AccessArticle

An Improved Calculation Model for the Prediction of the Wear of Coated Electrical Contacts

Precision Engineering Laboratory, Ostwestfalen-Lippe University of Applied Sciences and Arts, 32657 Lemgo, Germany
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Technologies 2019, 7(4), 77; https://doi.org/10.3390/technologies7040077
Received: 28 August 2019 / Revised: 20 October 2019 / Accepted: 27 October 2019 / Published: 31 October 2019
(This article belongs to the Special Issue Microswitching Technologies)
To connect terminals in a cyber–physical system, large quantities of electrical contacts are used. In order to guarantee a high reliability of the system, the lifetime of the electrical contacts should be very long. Thus, it is of great importance to understand the failure mechanism and then to predict the lifetime of the electrical contacts. For the applications under high thermal and/or mechanical loads, noble plating is a good choice, considering its inertness to oxidation. For noble plating, one of the most critical failure mechanisms is the fretting wear. Wear debris generated in the contact area, acting as the third bodies, will greatly influence the further wear behavior and electrical performance. In this study, the state of the art regarding third bodies is firstly reviewed, and then the influence of the third bodies on the wear and electrical performance is investigated, from the aspects of lifetime and the element distributions in contact area. Finally, an example of prediction of the wear of noble plating is shown with the consideration of the third bodies. Based on this study, by involving the third bodies, the wear of noble plating can be predicted with a higher accuracy. View Full-Text
Keywords: electrical contacts; noble plating; third bodies; wear prediction electrical contacts; noble plating; third bodies; wear prediction
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Yuan, H.; Song, J. An Improved Calculation Model for the Prediction of the Wear of Coated Electrical Contacts. Technologies 2019, 7, 77.

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