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The Performance of Common Connector Materials under Fretting

Author: DengXiaoJun
Tutor: LinXueYan
School: Beijing University of Posts and Telecommunications
Course: Detection Technology and Automation
Keywords: Contact resistance Micro performance The data processing Connector materials PWB surface morphology
CLC: TM503.5
Type: Master's thesis
Year: 2009
Downloads: 75
Quote: 2
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Abstract


Electronic power system of the communication system using a large number of electronic connectors, connect seriously affect the reliability of the system performance analysis, micro is one of the main connection is not reliable. This paper first discusses the method of micro-processing of the experimental data. Micro characteristics of the experimental data, the following method for processing: first strike each sampling point in each cycle the average and median filtering method to eliminate errors in the data, after median treatment method or the method of least squares curve fitting, all data is saved as a text file and Excel file for further analysis of data. This paper discusses the common connector material contact fretting performance. Research material gilt, nickel-plated material, copper, stainless steel materials, and printed circuit board material. Contact pairs are bilateral plating material can get a good fretting performance, low contact resistance (contact pressure of 150 g and Micro amplitude 200μm case, the contact resistance is less than 10MW) and smooth change. Sided gold-plated material the micro performance by paired materials. Gilt and nickel-plated material and copper material between the good performance of micro, stainless steel micro performance is relatively poor. For the gold-plated material, increasing the pressure and the thickness of the gold layer, can reduce the contact resistance, but when the pressure and the coating thickness is large, the increase of the pressure and the thickness of the coating is limited to reduce the contact resistance. Nickel-plated material of the contact resistance in the beginning of dozens jog cycle remains at a low level, after the increase with the number of cycles of the jog, the contact resistance increases sharply and beating violently. The pressure and the thickness of the coating on the contact resistance of the nickel-plated material exhibit a certain complexity, the relatively large difference in the type of conditions. Copper and stainless steel material nickel-plated materials a similar micro performance can be improved by changing the paired contact materials, contact performance, the best gold-plated material, nickel-plated material and copper materials, followed by stainless steel worst. Printed circuit board material, by its own specific structure in different contact areas exhibit different fretting performance, when contact with the crest, the contact resistance is easily increased and larger changes; easy to maintain contact while in the valleys, the contact resistance in the lower level and stable.

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CLC: > Industrial Technology > Electrotechnical > Electrical > General issues > Structure > Connectors
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