Platov South Russian State Polytechnic University, Novocherkassk, Russia:

S. N. Sergeenko, Professor of a Chair of Materials Science and Materials Technology, e-mail: sergeenko@gmail.com
N. S. Alabid, Master's Degree Student of a Chair of Materials Science and Materials Technology

This paper shows the obtaining technology of hot-compacted powder composite materials Al – SiC based on mechanochemically activated charges in liquid medium of saturated boric acid water solution. We investigated the granulometric composition of activated powder Al-based charges, containing SiC (0–30% (wt.)), and defined the formation of agglomerated charge during mechanochemical activation. Sizes of agglomerates and their constituent particles depend on SiC content in charge. Laser analysis of granulometric composition of activated charge Al – SiC (10% (wt.)) defined high-disperse particles, included in agglomerates. Influence of cold pressing pressure and SiC content in charge on relative density of moldings and hot-compacted intermediates was investigated on the basis of two-factor experiment. Compaction regularities during the cold pressing of mechanochemically activated powder charge Al – SiC were defined, and parameters of compacting equation, depending on the SiC content in charge were calculated. Increased hardness of hot-compacted material on the basis of charge Al – SiC is shown, obtained by the mechanochemical activation technology in comparison with mixing. There were defined the optimal technological parameter values of obtaining of powder low-porous material with increased relative density and hardness. There was defined the hereditary influence of mechanochemical charge activation on formation of hot-compacted material Al – SiC structure. There was offered the improved technology of obtaining of hot-deformed powder composite material Al – SiC (10% (wt.)), including the mechanochemical activation of charge in saturated water solution H₃BO₃, cold pressing, heating in air atmosphere and following hot stamping.

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18. Goncharova O. N., Sergeenko S. N. Infiltrovannye materialy na osnove mekhanicheski aktivirovannykh v zhidkikh sredakh poroshkovykh shikht Fe – Ni (Infiltrated materials based on mechanically activated in liquid media powder mixture Fe – Ni). Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova = Vestnik of Nosov Magnitogorsk State Technical University. 2012. No. 1. pp. 98–101.
19. Fedoseeva M. A., Sergeenko S. N. Powder material based on mechanochemically activated alloy D-16 turnings. Metallurgist. 2015. Vol. 59, No. 5. pp. 535–539.
20. Dyuzhechkin M. K., Sergeenko S. N., Popov Yu. V. Features of structure and property formation for hot-deformed materials of the Al – Si and Al – Si – C systems based on mechanochemically activated charges. Metallurgist. 2016. Vol. 59, No. 9. pp. 835–842.