MECHANICAL ACTIVATION OF THE POWDER MIXTURE OF “ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE — COMPOSITE B₄C/W”

KOVALEVA Svetlana A., Senior Researcher of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZHORNIK Viktor I., D. Sc. in Eng., Assoc. Prof., Head of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GRIGORIEVA Tatyana F., D. Sc. in Chem., Leading Researcher of the Laboratory of Chemical Materials Science, Solid State Chemistry and Mechanochemistry of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

The article presents the results of the experimental studies of the structural transformations of a powder mixture of ultra-high molecular weight polyethylene and 80 wt.% (45 vol.%) of the nanostructured composite B₄C/W treated in a high-energy ball planetary mill that are studied by the methods of X-ray diffraction, scanning electron microscopy and Fourier-IR spectroscopy. It is shown that the polymer composite particles of a flaky shape and the size of 160–400 μm with a uniform distribution in them of boron carbide and tungsten particles with the size of 1–5  μm and 0.1–0.2 μm respectively are formed during the process of mechanical activation (MA), while the oxidative destruction of polymer is not detected. The main results of the interaction of the polymer matrix and dispersed filler powders with MA are the processes of breaking of intramolecular bonds, cross-linking of polymer molecules, as well as mechanical dispersion of particles.

mechanical activation, microstructure, composites, ultra-high molecular weight polyethylene, boron carbide, tungsten

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