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| 不同碳质相增强银基复合材料的电接触行为 |
| Electrical Contact behaviors of Silver-based Composites Reinforced with Different Carbonaceous Phases |
| 投稿时间：2018-04-11 |
| DOI： |
| 中文关键词: 复合材料 银基 碳质相 电接触 材料转移 电弧特征 |
| 英文关键词: composites silver-based carbonaceous phase electrical contact material transfer arc characteristic |
| 基金项目:国家自然科学基金项目(51707087、51507075)、云南省应用基础研究项目(2018FB094、2018FD142、2016FB092)。 |
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| 中文摘要: |
| 采用粉末冶金工艺制备碳质相质量分数为3%的不同碳质相(石墨、碳纳米管和石墨烯)增强银基复合材料，并对其微观组织和物理性能进行表征。对复合材料触头进行直流阻性负载条件下的电弧侵蚀试验，研究了不同碳质相对复合材料电弧特征、材料转移和质量净损耗的影响。结果表明，银-碳纳米管复合材料具有最佳的致密度、硬度和抗拉强度；而银-石墨烯复合材料具有最好的导电率。复合材料触头的材料转移方式均为阴极向阳极转移。同等电接触参数条件下，银-石墨烯复合材料具有最佳电接触性能，其燃弧时间最短、燃弧能量最低、材料转移量和质量净损耗最少。 |
| 英文摘要: |
| Silver-based composites reinforced with 3% graphite, carbon nanotube or graphene were fabricated by powder metallurgy process. Their microstructures and physical properties were characterized by SEM.The arc erosion of the composite contact materials was tested under DC resistance load, and the effects of different carbonaceous phases on arc characteristics, material transfer and net mass loss were investigated by various methods. The results indicate that the silver-carbon nanotube composite has the best relative density, hardness and tensile strength, and that the silver-graphene composite has the best electrical conductivity. The material transfer method of all composite contacts is a cathode-to-anode transfer.The silver-graphene composite has the best electrical contact performance: the shortest arcing time, the lowest arcing energy, and the least material transfer and net mass loss under the same electrical contact parameters. |
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