Taking pure copper powder such as electrolytic copper powder

gas atomized copper powder

water atomized copper powder

alloy copper powder such as tin bronze powder

brass powder

white copper powder as the matrix

copper-based friction materials were prepared by powder metallurgy intergrated with hot pressing sintering.The results reveal that the comprehensive performance of pure copper powder is superior to that of alloy copper powder.Among them

the samples prepared by electrolytic copper powder has the desirable performance

where the density is 5.46 g/cm

3

the porosity is 18.14% and the hardness is 23.20 HBW.The samples prepared by atomized copper powder can increase the surface energy and interfacial energy of the powder due to the spherical particle shape playing a role of stabilizing friction and increasing the friction coefficient.And the friction coefficient of the gas atomized copper powder sample reaches up to 0.33.However

in the sample prepared by the alloy copper powder

the irregular shape and structure of the matrix material result in a decrease in the bonding ability and fluidity of the material.After the friction

the material is seriously deformed and the wear rate is increased greatly.