Abstract
This paper is devoted to the preparation of Al–Mn–Si-based compounds with different Si contents (0, 5, 10, and 15 at. \(\%\) ) using self-propagating high-temperature synthesis (SHS). This method is used for the first time to obtain the Al \({}_{9}\) Mn \({}_{3}\) Si \(\gamma\) -phase with a hexagonal crystal lattice ( \(P6_{3}/mmc\) space group) as part of a synthesized alloy with a content of 15 at. \(\%\) of Si in the initial mixture. The X-ray diffraction analysis of the synthesized alloys from mixtures with a silicon content of 5–10 at. \(\%\) also shows the presence of \(\gamma_{2}\) -Al \({}_{8}\) Mn \({}_{5}\) (trigonal, \(R3m\) space group) and MnSi (cubic, \(Pm\) - \(3m\) space group) phases. The phase formation of intermediate compounds at silicon content in a mixture below 15 at. \(\%\) may be associated with combustion temperature, which is insufficient for complete interaction of the system components. Synthesized alloys are characterized by a porous structure with pore size up to 20 \(\mu\) m and a grain size in the pore space of 10–90 \(\mu\) m.
