Actual Problems in Machine Building 2019 Vol. 6 No. 1-4

Actual Problems in Machine Building. Vol. 6. N 1-4. 2019 Materials Science in Machine Building ____________________________________________________________________ 184 INVESTIGATION OF THE STRUCTURE AND PHASE COMPOSITION OF DISPERSION-STRENGTHENED COMPOSITE MATERIALS OF THE SYSTEM Cu-Al-Ti-C-O Smirnov V.M., D.Sc. (Physic and mathematic), Associate Professor, e-mail: vms53@inbox.ru Shalunov E.P., D.Sc. (Engineering), Professor, e-mail: shalunov2003@mail.ru I. N. Ulianov Chuvash State University, 15 Moskovsky Prospekt, Cheboksary, 428015, Russian Federation Abstract The results of the study of the structure and phase composition of dispersion-strengthened composite materials of the Cu-Al-Ti-C-O system obtained by the method of reactive mechanical alloying of copper powder with aluminum, titanium and carbon in the atmosphere of an attritor working chamber are presented. It is shown that the complex doping of powdered copper provides the material obtained on its basis with a combination of high electrical conductivity and hardness. Based on the X-ray phase analysis of the anodic sediment of the studied materials, it was shown that the main strengthening particles are aluminum oxide and titanium carbide. In addition, traces of the presence of free carbon in the form of graphite and titanium in the form of its α modification are found. The microstructure of the studied materials consists of light and dark structural components. Annealing at 850 ... 950 °C does not eliminate the heterogeneity of the structure, but, on the contrary, makes it more contrast. Keywords Atritor, reactionary mechanical alloying, granules, dispersion-strengthened composite materials, microstructure, lattice parameter, X-ray phase analysis, disperse phases