Preparation and properties of multi-layer graphene reinforced of silver copper matrix brush
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.
graphenesilver copper matrix brushpowder metallurgyfriction and wear propertyphysical property
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