Application of SHS auxiliary reaction of titanium carbide for introduction of AlN nanoparticles into aluminum melt

Abstract

For ex-situ introduction of AlN nanopowder, obtained by azide technology of self-propagating high-temperature synthesis (SHS) or combustion synthesis in the mixture with the flux cryolite: (AlN-35%Na3AlF6), into the aluminum melt, an exothermic master powder composite (EMPC) of different composition (AlN-35%Na3AlF6) – (Ti + C) – Na2TiF6 was first used, leading to the realization of in-situ process of SHS of reinforcing phase TiC in the combustion mode in the aluminum melt. The conditions were found for reliable ignition of the EMPC and fabrication of cast hybrid nanocomposites Al-Al-TiC, including the calculated composition Al-7.7%AlN-19%TiC with an increased content of AlN reinforcing phase.