Tribological behaviors of C/C-Cu composites carrying electric current

C/C-Cu composites were fabricated by infiltrating molten Cu alloy into C/C preforms.Under normal temperature,the moulded dry sliding friction and wear experiments were carried out on a refitted QDM150 tribometer under different electric currents and rotation speed of coupled copper disc.The worn surface morphologies of the composite specimens were analyzed by scanning electron microscopy.The results show that the friction coefficient of the C/C-Cu composites specimens decreases and wear rate increases with the increasing of electric current,and the wear of anode is larger than that of cathode,which may attribute to the chemical reaction on the interface;The friction coefficient and the wear rate both decrease with the increasing of the coupled-copper-disc's rotation speed.By the scanning electron microscopy,it has been found that the debris exist in the form of flake on the anode,and fine,loose and equiaxed on the cathode.