Microstructure and Mechanical Effects of Co–Ti Powder Particles on Cu Matrix Composites

Abstract—Powder metallurgy was used in this study. High purity cobalt and titanium powders were added to copper powders at a ratio of 5–10–15 wt %. The reinforcing powders added to the copper powders were mixed for about 6 hours in a Turbula device. Then, the powders were compressed by applying 600 MPa using a hydraulic press. The samples were sintered at 1000°C for 30 min. After sintering, density measurements, and microstructure and mechanical tests of the samples were done. Scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction analyses were performed in the microstructure characterization. Tensile and wear analyses were performed for mechanical experiments. The tensile test results were determined by applying certain loads to the samples. The tensile strength of the 5 wt % Co–Ti reinforced sample was the highest, with an average of 118.65 MPa, and the ductility increased in parallel. Weight loss, friction coefficient change, and wear diameter image results were obtained from the wear test. The lowest weight loss was observed in the composite containing 5 wt % Co–Ti and this value was determined as 0.0191 g. The increase in the reinforcement rate contributed positively to tensile and abrasion resistance.