CF/Cu COMPOSITE MATERIALS CONTAINING Fe OR Ni

The unidirectional and random CF/Cu-Fe,CF/Cu-Ni composites were fabricated by hot press with duplex coated CF which were made by electroplating CF with Cu prior to with Fe or Ni.The electrical resistivities are larger than those of CF/Gu composites at approximate V_f.The linear thermal expansion coefficients of composites can be drastically reduced by increasing V_f.From the SEM photos of fracture surfaces, the matrix emerges obvious plastic deformation in CF/Cu-Ni and them are discontinuous nodes on the CF surface in CF/Cu-Fe,but CF have not been pulled out long.The interface structure of composites is covered with discontinuous Fe₃C grains and the interface zone between CF and Cu in CF/Cu-Ni composites is Cu-Ni solid solution which can dissolve mninute amount of carbonori.The interface bonding in CF/Cu-Fe and CF/Cu-Ni composites are strengthencd by chemical reactions and dissolution.