1Helwan Universit 2King AbdulazizCity for Science and Technology 3Imam Mohammad Ibn Saud Islamic University (IMSIU) 4Imam Mohammad Ibn Saud Islamic University (IMSIU)
Carbon short fbers/copper composites with diferent carbon short fber contents up to 15 wt.% as reinforcements are prepared to investigate the infuence of the carbon short fber surface coating on the microstructure, density, and electrical properties of the carbon short fbers/copper composites. The carbon short fbers were surface treated by acid functionalization followed by alkaline treatment before the coating process. It was observed from the results that coated type copper nanoparticles were deposited on the surface of the carbon short fbers. The surface treated carbon short fbers were coated by copper using the electroless deposition technique in the alkaline tartrate bath by using formaldehyde as a reducing agent of the copper sulfate.
The produced coated carbon short fbers/copper composite powders were cold compacted at 600 MPa, and then sintered at 875 °C for 2 h under (hydrogen/nitrogen 1:3) atmosphere. A reference copper sample was also prepared by the same method to compare between the properties of pure copper and the carbon short fbers/copper composites. The phase composition, morphology, and microstructure of the prepared carbon short fbers/copper composite powders as well as the correspond�ing carbon short fbers/copper composites were investigated using X-ray difraction analysis (XRD) and scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS), respectively. The density and the electrical resistivity of the sintered composites were measured. It was observed from the results that the density was decreased; how�ever, the electrical resistivity was increased by increasing the carbon short fbers wt.%.