铜对碳纤维/酚醛树脂受电弓滑板材料的性能影响

采用热压烧结法制备了碳纤维织物/酚醛树脂(PE)受电弓滑板复合材料,研究了Cu对碳纤维织物/PE受电弓滑板复合材料的电阻率、密度和力学性能的影响。采用万能材料试验机、电阻测试仪测试了复合材料的力学性能和电学性能,用金相显微镜、扫描电子显微镜(SEM)分析测试手段对材料的组成结构及断口微观形貌等进行了测试和表征。结果表明,铜粉经高温烧结后呈连续三维网状结构,这种结构与碳纤维织物协调作用,阻止裂纹扩展,提高了复合材料的力学性能;当铜含量为40%时,复合滑板材料的综合性能最优:电阻率降至22.1μΩ.m;弯曲强度和压缩强度分别提高至61.8MPa和29.6MPa;冲击韧性达到12.7 J/cm3。

Effect of Cu Mass Fraction on Properties of Carbon-fiber Fabric/Phenolic Resin Pantograph Slider Composites

Carbon-fiber fabric/phenolic resin pantograph slider composites were prepared by hot-press sintering.The effect of Cu mass fraction on resistivity,density and mechanical properties of the composites were investigated.The mechanical properties and resistivity were tested by universal testing machine and resistance meter.The phase compositions and fracture surface morphologies of the composites were characterized using metallurgical microscopy and scanning electron microcopy（SEM）.The results showed that copper powder by hot-press sintering was a continuous three-dimensional structure.And the mechanical properties of composites enhanced by the structure and carbon fiber fabric together.When Cu mass fraction was 40%,resistivity of composites was reduced to 22.1μΩ·m,flexural strength and compressive strength of composites was increased to 61.8MPa and 29.6MPa,and the impelling strength also was increased to 12.7J/cm^3.