Processing of Ni–Al intermetallic with 2D carbon components

Abstract

We investigated the peculiarities of the combustion synthesis (or self-propagating high-temperature synthesis − SHS) as well as the structure and phase formation in the Ni–Al–C system. Different carbon components (soot, graphite, carbon nanotubes) were used for synthesis of Ni–Al based intermetallic materials. The synthesized materials were characterized by X-Ray diffraction and SEM analysis confirmed the presence of nanolayered graphite films on the surface of the NiAl intermetallic grains. The data of SEM analysis demonstrated that carbon predominantly located along the boundaries of intermetallic NiAl grains forms a continuous multilayered film on their surface with a thickness of about 60–70 nm. Ni and Al are melted in contact with a carbon at a combustion temperature to saturate with carbon at a concentration corresponds to the binary phase diagram of metal–carbon.