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| Friction and wear performance analysis of sintered RGO/Cu-Ag composites for brake shoes |
| LI Yuan-jun |
| College of Automobile and Aviation, Hubei Vocational and Technical College of Communications, Wuhan 430079, China |
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Abstract The surface of graphene oxide (RGO) was loaded with nano-Cu particles by electroless plating, and then mixed with Cu-Ag matrix to prepare RGO/Cu-Ag composite materials. SEM and XRD tests were carried out, and the wear resistance of the samples was characterized by a friction tester. The results show that when the mass percent of RGO is 4%, the surface of the composite is in a state of combination of particles and flakes. With the increase of RGO content, the hardness and elastic modulus of the composite increase first and then decrease. When the mass percent of RGO is 4%, the hardness and elastic modulus of the composite are the largest, which are 64.82 HV and 104.26 GPa, respectively. At this time, the sample is worn into a strip-shaped furrow shape with regular arrangement, and the original scabbing rough area disappears. With the increase of RGO content, the friction coefficient of the sample first decreases and then increases. When the mass percent of RGO is 4%, the friction coefficient of the sample reaches the lowest value of 0.28, while the surface roughness decreases to 1.68 μm.
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Received: 14 February 2019
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2019, Vol. 29 
