Cu-SiC-SnO_2电接触复合材料致密度及电烧损性能研究

Research on Relative Density and Arc Erosion Properties of Cu-SiC-SnO_2 Composite Materials for Contactor

采用高能球磨、粉末压制、烧结以及热挤压的方法制备了Cu-SiC-SnO_2电触头复合材料,研究了球磨时间、压制压力、烧结温度、烧结时间和挤压温度等参数对材料致密度的影响。通过电寿命试验结合微观分析研究了材料的电烧损性能。结果表明,提高压制压力、球磨时间和烧结温度、延长烧结时间可以提高材料的致密度,随挤压温度升高,致密度呈先增后降趋势。添加SnO_2可提高材料的粘度,降低喷溅物含量,增强材料的抗熔焊性及抗电烧损性能。

The Cu-SiC-SnO 2 electric contactor composite material fabricated through high-energy milling, powder-packing, sintering and hot-extrusion process. The technical parameters, including milling time, preform packing pressure, sintering temperature, sintering time, and hot-extrusion temperature, relative density of the final composite samples are investigated. The effect of additive on anti-arc erosion has been investigated by means of electric duribility testing device, and microstructure analysing. The relative density of the composite materials were increased with increasing the preform packing pressure, milling time, sintering temperature and sintering time. The relative density first were increased and then dropped with increasing the hot-extrusion temperature. The SnO 2 component have an effect on increasing the viscosity of the melt, so to decrease the spray, and result in an anti-welding property and anti-arc erosion.