Formation of the structure and properties of composite materials based on copper powder during its reactionary mechanical alloying with titanium, carbon and oxygen

Chuvash State University, Joint R&D Laboratories of Mechanically Alloyed Nano-Composite Materials, their Technology and Quality, 428015 Cheboksary, Moscovsky Prospekt 15, Russia

^* Corresponding author: vms53@inbox.ru

Abstract

The results of studying the structure and properties of dispersion-strengthened composite materials of the Cu-Ti-C-O system obtained by reactionary grinding of copper powder with additions of titanium powder (0...5 wt%) and carbon in the form of graphite (0...1 wt%) in a high-energy ball mill of the attritor type in the presence of air. The regularities of the influence of titanium and graphite content on the hardness and electrical conductivity of the materials under study have been studied. It is shown that with an increase in the titanium content, the hardness increases and the electrical conductivity decreases. The hardness and electrical conductivity of materials under study dependences on the graphite content have the form of curves with maxima, which are observed at different values of the carbon content depending on the titanium content. By the method of X-ray phase analysis of the anode deposit of materials under study, it was found that the main strengthening phases are dispersion particles of titanium carbide. The composite materials under study of the Cu-Ti-C-O system, due to the combination of high electrical conductivity, hardness and recrystallization temperature, can be an alternative for replacing beryllium bronze in many fields.