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故障连接器触点表面污染物的特征和成因的初步分析 被引量:4

Analysis of the Characteristics and Cause of the Contamination on the Surface of Failed Connector
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摘要 在电子通信设备中,电接触故障是通信传输故障的重要原因。经检测,触点表面污染物是导致连接器电接触故障的主要原因之一。由于污染物在电流通过时呈现高电阻特性,当接触位于污染物上时,就可能会造成电接触故障。对于某失效连接器故障接触表面的SEM/XES分析表明,接触区的污染物数量远高于非接触区。接触区的污染物基本上连续地堆积在触点周围,非接触区的污染物多为散布的颗粒。接触区的污染物由尘土和金属磨损碎屑组成,有些污染物由微粒堆积而成。用扫描电子显微镜(SEM)和能谱仪(XES)对污染表面进行了显微观测和成分分析,统计出了表面污染物中的常见元素。根据检测结果可初步推测,触点表面对大气中尘土颗粒的吸附以及触点间的磨损是表面污染物形成的主要原因。
出处 《机电元件》 2005年第3期8-11,14,共5页 Electromechanical Components
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