Application of SHS processes for in situ preparation of alumomatrix composite materials discretely reinforced by nanodimensional titanium carbide particles (Review)

Resumo

Types and fabrication methods of discretely reinforced alumomatrix composite materials (AMCMs), the wide application of which is hindered by a whole series of unresolved problems, are reviewed. These problems are the high cost of both reinforcing materials and the entire production process of composites; a not always sufficient level of strength properties, especially at elevated temperatures; the distribution nonuniformity of reinforcing particles over the volume of the aluminum matrix; and insufficient bond strength with it. It is discussed what contribution can be introduced into the solution of these problems by applying in situ processes, particularly, the SHS process, in order to fabricate cast nanostructured AMCMs. This is shown in more detail by the concrete example of the Al–10%TiC composite discretely reinforced by nanodimensional titanium carbide particles.