CAJ | 학술논문

采用热压方法制备不同石墨烯含量的铜?石墨烯复合材料，并将其力学性能和摩擦磨损性能与用相同方法制备的铜?石墨复合材料进行对比。实验结果表明：当复合材料中石墨与石墨烯体积分数相同时，铜?石墨烯复合材料具有更高的相对密度、显微硬度以及抗弯强度。随着铜?石墨烯复合材料中石墨烯含量的增加，材料的摩擦系数及磨损率明显降低，而铜?石墨复合材料中石墨的减磨作用较小。两种复合材料的磨损机制主要为磨粒磨损和疲劳磨损。铜?石墨烯复合材料优异的力学性能和摩擦磨损性能得益于石墨烯高的润滑效率及其对铜基体的增强作用，这表明石墨烯是铜基复合材料的理想添加剂，不仅可以作为有效的润滑剂，还可以作为良好的强化相。
채용열압방법제비불동석묵희함량적동?석묵희복합재료，병장기역학성능화마찰마손성능여용상동방법제비적동?석묵복합재료진행대비。실험결과표명：당복합재료중석묵여석묵희체적분수상동시，동?석묵희복합재료구유경고적상대밀도、현미경도이급항만강도。수착동?석묵희복합재료중석묵희함량적증가，재료적마찰계수급마손솔명현강저，이동?석묵복합재료중석묵적감마작용교소。량충복합재료적마손궤제주요위마립마손화피로마손。동?석묵희복합재료우이적역학성능화마찰마손성능득익우석묵희고적윤활효솔급기대동기체적증강작용，저표명석묵희시동기복합재료적이상첨가제，불부가이작위유효적윤활제，환가이작위량호적강화상。
The mechanical and tribological properties of hot-pressed copper-based composites containing different amounts of graphene nanosheets (GNSs) are compared with those of copper?graphite (Gr) composites fabricated by the same method. The results show that the Cu?GNSs composites exhibit higher relative density, microhardness and bending strength compared with Cu?Gr composites with the same volume fraction of GNSs and Gr. Moreover, the friction coefficients and wear rates reduce significantly by the addition of GNSs, whereas the limited impact on reducing friction and wear is found on graphite. The abrasive and delamination wear are the dominant wear mechanisms of the composites. It is believed that the superior mechanical and tribological performances of Cu?GNSs composites are attributed to the unique strengthening effect as well as the higher lubricating efficiency of graphene nanosheets compared with those of graphite, which demonstrates that GNS is an ideal filler for copper matrix composites, acting as not only an impactful lubricant but also a favorable reinforcement.