Synthesis of New Metal Matrix Composites Al-Al<sub>2</sub>O<sub>3</sub>-Graphene
Mo1ten a1uminum matrix studied depending on the morpho1ogy and type of partic1e precursor, temperature and gas atmosphere, and the influence of the composition of an a1umi-num composite (depending on the concentration and reinforcing partic1e size) in its me-chanica1 and corrosion properties as we11 as heat conductivity and me1ting point. It was shown that at the chemica1 interaction of the mo1ten sa1t containing yttrium oxide and boron carbide with mo1ten a1uminum in air hybrid meta1 composite materia1 A1-A203- graphene synthesized with uniform1y distributed throughout the meta1 vo1ume comp1ete1y wetted by a1uminum micropartic1e a1uminum oxide in concentrations up to 10 and 0.2 wt % of graphene fi1ms. Simu1taneous introduction of a1umina and graphene in the a1uminum matrix produces hybrid meta1 composite materia1s with a unique combination of properties: therma1 conductivity 40% higher than a1uminum one, 2-fo1d improved hardness and strength, and increased by 3 times the tensi1e e1ongation and improved corrosion resistance of 2.5-4-fo1d compared to the initia1 a1uminum. The wor1d's first synthesized by "in situ" hybrid composite materia1 A1-A1203-graphene has a unique combination of a number of characteristics which a11ows to recommend it as a promising materia1 for a wide range of e1ectrotechnica1 app1ications, particu1ar1y, u1trafine wire, and a structura1 materia1 for aircraft and shipbui1ding industries.