Intermetallids Ni₃Al and Fe₃Al with directional structure as future materials

Presents data which relate to the problem of creating a new technique and technology. In the 1990s the problem of the practical use of intermetallids Ni₃Al and Fe₃Al as structural components in aircraft industry in the USSR was at the stage of a pilot application. In the USSR the process of the directional solidification of superalloys used in components of aircraft engines was at a high level. There was a commercial process for obtaining turbine blades with columnar structure (DC) and single crystal structure (SC) using different methods of cooling for the ingots during the growth, such as cooling on the copper shield and in melt metals (Sn,Al). On the basis of obtained data, theoretical research was conducted regarding the creation of new processes which could give rise to the possibility of directional solidification. One of these processes is the method of dosed feeding of the growing ingots. This method allows alterations to the microstructure, the plasticity, the strength of Ni₃Al and Fe₃Al intermetallids, and corrosion and oxidation resistance.