Actual Problems in Machine Building. Vol. 11. N 3-4. 2024 Materials Science in Machine Building ____________________________________________________________________ 70 STUDY OF THE EFFECT OF INTRODUCING COPPER OXIDE INTO THE INITIAL POWDER MIXTURE ON THE PROPERTIES OF DISPERSION-STRENGTHENED COMPOSITE MATERIAL OF THE CU-AL-C-O- SYSTEM BASED ON POWDER COPPER Vladimirova Yu.O., Post-graduate Student, e-mail: yulivladimirova@mail.ru Plotnikov V.V., Post-graduate Student e-mail: acc_plotnokov@tambler.ru Shalunov E.P., Ph.D. (Engineering), Professor, e-mail: shalunov2003@mail.ru I.N. Ulianov Chuvash State University, 15 Moskovsky Prospekt, Cheboksary, 428015, Russian Federation Abstract The work describes the effect of adding copper oxide in amounts up to 4 wt. % into the initial powder mixture when obtaining a dispersion-strengthened composite material of the Cu-Al-C-Osystem based on powder copper, obtained using the method of reactive mechanical alloying and powder and granular metallurgy technologies. From the data obtained it follows that an additive in the amount of 3 wt. % is optimal. Due to this, it was possible to increase the strength of the material by 23 % and ductility by 16 %. In terms of the level of strength and plastic properties achieved, the material meets the requirements for materials for plungers of pressure casting machines. Keywords Dispersion-strengthened composite materials, plungers of pressure casting machines, strength, ductility
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