Compacting of Material by Combining Spark Plasma Sintering and Self-Propagating High-Temperature Synthesis in Ti–Al–C System.

Initiation of self-expanding high-temperature synthesis (SHS) in the Al–Ti–C system in the process of spark plasma sintering (SPS) of specimens allows obtaining a material with high density, which contains MAX-phases. A simple rheological theory has been developed, which can describe SHS and SPS processes under certain conditions. Within the framework of this model, the processes of pressing and extrusion at uniaxial pressure are considered. The dependence of the relative density of the powder mixture on time is scaled by the factor of the ratio of pressure to the viscosity of the invariant base of the material. Analytical time dependences of the plunger speed and sample height, as well as the time required to achieve the specified value of the relative density of the Al–Ti–C material, which allows us to predict and analyze the compression of powder mixtures in the SPS process were obtained. [ABSTRACT FROM AUTHOR]