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采用放电等离子烧结法(SPS法)制备了不同TiB_2体积分数的TiB_2/Cu复合材料,测试其密度、硬度和导电率,观察其微观组织;利用JF04C型电接触材料性能测试系统探究TiB_2含量和电流对复合材料耐电弧烧蚀性能的影响。结果表明:加入TiB_2增强相后,复合材料中Cu晶粒得到细化;当TiB_2体积分数增至5%时,相比纯Cu,TiB_2/Cu复合材料硬度增加了28%、导电率降低了16%;在电接触试验中,随着TiB_2体积分数增加,触头材料总质量损耗减少;当电流为10 A时,5%TiB_2/Cu触头材料无明显材料转移,当电流大于15 A时,材料明显从阳极向阴极转移,且随电流增大转移量随之增加。
TiB 2 / Cu composites with different volume fraction of TiB 2 were prepared by spark plasma sintering (SPS). The density, hardness and electrical conductivity of TiB 2 / Cu composites were measured and the microstructure was observed. The TiB 2 content and current were measured by the JF 04C electrical contact material performance testing system Effect of composite arc erosion resistance. The results show that the addition of TiB 2 enhances the grain refinement of Cu. When the volume fraction of TiB 2 increases to 5%, the hardness of TiB 2 / Cu composites increases by 28% and conductivity decreases by 16% compared with pure Cu %. In the electrical contact test, the total mass loss of the contact material decreases with the increase of TiB 2 volume fraction. When the current is 10 A, the material of 5% TiB 2 / Cu contact material has no obvious material transfer. When the current is greater than 15 A, The material is obviously transferred from the anode to the cathode, and the transfer amount increases with the increase of the current.