from the conferences organized by TANGER Ltd. provisional website
Using nanoparticles as reinforcement for aluminum matrix composites allows significantly increase mechanical and operational properties of details. However, input of exogenous nanoparticles into the aluminum melts is associated with significant technological difficulties caused by their agglomeration and poor wettability with liquid aluminum. For these reasons, it is ineffective to use traditional liquid phase methods of composites production (stir casting, etc.) for synthesis of aluminum matrix nanocomposites. One of solutions is the input of exogenous nanoparticles in metal melts within mechanically activated and compacted mixture of reaction-active powder precursors. Within designated approach was developed liquid-phase technological process of production of aluminum matrix nanocomposites of the system Al-Al3Ti-TiB2-Al2O3, including mechanical activation of titanium and boron powders with alumina nanoparticles in planetary ball mill, compacting the mixture and entering the preforms into matrix melt, holding of composite melt for components interaction, stirring and pouring. Selection of reinforcing components based on thermodynamic analysis of interphase interaction processes in considered system. The effect of temperature and time parameters of technological process of aluminum matrix nanocomposites manufacturing and thermal conditions of composite melt crystallization on structure formation and phase composition of cast samples are studied. Adding of nanoparticles leads to decrease in the mean size of intermetallic compounds and changes their morphology to a more compact and also improves the uniformity of their distribution in the structure of cast material. X-ray phase analysis confirms the formation of target endogenous reinforcing phases and retention of exogenous nanoparticles in conditions of liquid-phase technology of nanocomposites production.Keywords: aluminum matrix nanocomposites, liquid-phase technology, structure, phase composition.
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