多层石墨烯增强银铜电刷材料的制备和组织性能
Preparation and properties of multi-layer graphene reinforced of silver copper matrix brush
李雨阳 1陈志鹏 1李革民 1程继贵1
作者信息
- 1. 合肥工业大学材料科学与工程学院,安徽 合肥 230009;安徽省粉末冶金工程技术研究中心,安徽 合肥 230009
- 折叠
摘要
以银粉、铜粉为基体材料,添加0.5％～3.0％的多层石墨烯作为增强相,通过机械混粉、压制烧结制得Gr/Ag-15Cu复合材料,对其显微组织、力学性能和摩擦磨损性能等进行测试分析.实验结果表明:多层石墨烯在Ag-Cu基体中分布较为均匀,在含量超过1.5％时开始出现团聚现象.随着石墨烯含量的增加,Gr/Ag-15Cu复合材料试样的密度、硬度呈下降趋势,在石墨烯含量超过1.5％后烧结体试样的硬度会有较大程度的降低.石墨烯的增加,使Gr/Ag-15Cu复合材料的摩擦磨损性能得到显著提升,磨损量随着石墨烯含量的增加先显著降低后升高,在含量1.5％时石墨烯可以在摩擦表面形成稳定的碳质膜起润滑作用,并且与基体有较高的结合强度,磨损量达到最低.
Abstract
The Gr/Ag-15Cu composites were prepared using silver powder and copper powder as matrix materi-als,adding 0.5％-3.0％multi-layer graphene as reinforcement phase.Microstructure,physical properties and fric-tion and wear properties of the sintered Gr/Ag-15Cu samples were tested and analyzed.The experimental results show that the multi-layer graphene is distributed uniformly in the Ag-Cu matrix,and agglomeration occurs when the content reaches more than 1.5％.With the increase of graphene content,the density and hardness of the Gr/Ag-15Cu composite samples show a decreasing trend,and there is a greater degree of decrease when the graphene content reaches more than 1.5％.With the increase of graphene,the friction and wear properties of the Gr/Ag-15Cu composite samples are significantly improved,and the wear amount first decreases significant-ly and then increases.At the content of 1.5％,graphene can form a stable carbon film on the friction surface to play a lubricating role,and has inferface strength with the matrix,making the wear amount reach the minimum.
关键词
石墨烯/银铜基电刷/粉末冶金/摩擦磨损性能/物理性能Key words
graphene/silver copper matrix brush/powder metallurgy/friction and wear property/physical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据