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抗电弧侵蚀性能是衡量电接触材料性能的重要指标,本文对采用放电等离子烧结技术(简称SPS法)制备出的Cu-10Cr复合材料进行电接触试验,研究了其在直流、阻性负载条件下材料的损失、转移情况,通过扫描电镜观察材料电弧侵蚀后的形貌并对形貌特征进行了表征。结果表明:在电流强度小于30 A条件下,材料未发生明显转移,但触头阴极和阳极均有一定的损耗;当电流强度大于35 A时,材料从阴极向阳极转移,并且随电流强度增大转移量随之增加;电弧侵蚀后触头表面呈现如气孔、裂缝和凹坑等形貌特征,且随电流强度增大而越明显;电流增加,熔焊力增大,接触电阻则有所降低。
The arc erosion resistance is an important index to measure the performance of the electrical contact material. In this paper, the Cu-10Cr composite prepared by the spark plasma sintering technique (referred to as SPS method) is subjected to electrical contact test. The effects of DC current, resistive load Material loss and transfer, the morphology of the material was observed by scanning electron microscopy and the morphology was characterized. The results show that the material has no obvious transfer under current intensity less than 30 A, but the cathode and anode have some loss. When the current intensity is more than 35 A, the material is transferred from the cathode to the anode, and with the increase of the current intensity The larger the amount of transfer increases; the surface of the contact after arc erosion shows features such as pores, cracks and pits, and more obvious with the increase of current intensity; the current increases, the welding power increases, the contact resistance is reduce.