摘要
为了有效改善球磨过程中石墨烯结构被破坏的问题,采用静电自组装、球磨与粉末冶金相结合的工艺制备还原氧化石墨烯-镍/铜(RGO-Ni/Cu)复合材料,并分析了球磨时间对RGO-Ni/Cu粉体形貌及RGO-Ni/Cu复合材料的显微组织、电导率、硬度和耐磨性能的影响。结果表明,随球磨时间增加,RGO-Ni/Cu复合粉体的形貌由团聚状转变为片层状再转变为碎片状,同时仍保留了自组装RGO-Ni粉体的二维褶皱状形貌。随着球磨时间的延长,RGO-Ni相在RGO-Ni/Cu复合材料中的分布形式由团块状分布逐渐转变为条状分布。球磨时间为4 h时RGO-Ni/Cu复合材料的综合性能最好,摩擦因数(COF)为0.456,RGO-Ni/Cu复合材料的磨损机制与石墨烯润滑膜的形成程度有关,且石墨烯润滑膜的形成受RGO-Ni/Cu复合材料相对密度的影响。
The RGO-Ni/Cu composites was prepared by electrostatic self-assembly,ball milling,and powder metallurgy to solve the problem of graphene structure damage in the ball milling.The effects of milling time on the morphology of the RGO-Ni/Cu powders and the microstructures、electrical conductivity、vickers hardness and antifriction performance of the RGO-Ni/Cu composite were studied.The results show that the morphology of the RGONi/Cu powders changes from agglomerated to lamellar and then to fragmented with increasing the milling time,while the RGO-Ni powders of the two-dimensional wrinkles shape still retaining.The decentralized form of the RGO-Ni phase in the RGO-Ni/Cu composites is transformed from agglomerate distribution to stripe distribution with the increasing of milling time.The RGO-Ni/Cu composite has the best comprehensive properties at the milling time of 4 h and the coefficient of friction(COF)is 0.456.The wear mechanism of RGO-Ni/Cu composites is related to the formation degree of the graphene lubrication film.The formation of graphene lubricating film is affected by the relative density of the RGO-Ni/Cu composites.
作者
闫贞
姜凤阳
付翀
王金龙
刘鑫
张思瑶
YAN Zhen;JIANG Fengyang;FU Chong;WANG Jinlong;LIU Xin;ZHANG Siyao(School of Materials Science&Engineering,Xi’an Polytechnic University,Xi’an 710048,China)
出处
《粉末冶金工业》
CAS
北大核心
2023年第1期60-66,共7页
Powder Metallurgy Industry
基金
陕西省自然科学基金资助项目(2020JQ-829)。
关键词
静电自组装
球磨时间
RGO-Ni/Cu
导电率
摩擦因数
electrostatic self-assembly
ball milling time
RGO-Ni/Cu
electrical conductivity
the coefficient of friction
