FRICTION AND WEAR OF BULK NANOCOMPOSITE MATERIALS AlMg2/GRAPHITE
Consolidation of nanocomposite AlMg2/graphite powders, produced by mechanical synthesis in a planetary ball mill, was carried out. Using the methods of Raman spectroscopy, and X-ray diffraction analysis, the structural-phase composition of the obtained bulk materials was studied. It was found that the samples have nanocomposite structure consisting of nanocrystalline aluminum and nanosized graphite particles. An increase in the consolidation temperature up to 450 °C leads to the formation of a dispersed phase of aluminum carbide. The effect of graphite percentage and consolidation conditions on the microhardness was estimated. Mechanisms of bulk material hardening are determined. Tribological tests of the obtained nanocomposite materials under conditions of contact interaction with 4Kh5MFS steel at a load of 1–10 N were carried out. Data on the change in the friction coefficient and magnitude of mass wear depending on the consolidation conditions and the graphite content were obtained.
Keyword(s): composite materials, wear, coefficient of friction.
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