磺化石墨烯提升受电弓炭滑板材料在常规和潮湿条件下的抗磨性

Sulfonated graphene improves the wear resistance of pantograph carbon slider materials under normal and wet conditions

以磺化石墨烯(SG)为添加剂,采用预模压、热挤压和焙烧等工艺,设计制备了一种新型受电弓炭滑板材料(PCS-1)。结果表明,PCS-1的力学强度和载流磨损性能均明显优于未改性的炭滑板材料(PCS-0)。载流磨损测试显示,与PCS-0相比,PCS-1的抗折强度提高了41.8%,载流磨损率在潮湿和常规环境条件下分别降低了51.0%和50.0%。扫描电镜、偏光显微镜和白光干涉仪等测试揭示了磺化石墨烯的加入显著减少了炭滑板材料的随机裂纹数量,提高了断口表面的致密度,因此抑制了炭滑板材料的电弧侵蚀,从而有效地提高了材料的抗磨性。

A novel pantograph carbon slider(PCS-1)was designed and prepared via mold pressing,hot extrusion and sintering using sulfonated graphene(SG)as additive.The results show that PCS-1 demonstrates an obvious enhanced mechanical strength and wear performances than that of carbon slider in the absence of SG(PCS-0).For example,the current-carrying wear test indicates that the flexural strength of PCS-1 is 41.8%higher than that PCS-0 counterparts.The wear rate of PCS-1 reduces 51.0%and 50.0%in the wet and normal conditions,respectively.Moreover,the presence of SG,as reflected in scanning electron microscopy,polarizing mi-croscope and white light interferometer,can markedly decrease the number of random cracks,increase the compactness of fracture surface and inhibit the electro-erosion of the slider materials,thus improving the mechanical strength and wear resistance signific-antly.