Studies of the microstructure of intermetallides based on Ti-Al-Nb, after spark plasma sintering

Abstract

This article presents the results of an analytical review of domestic and foreign studies on the problem of obtaining intermetallic materials. Brief characteristics of powder mixtures of intermetallides of various types, general information about the structure and their physical and mechanical properties, methods for obtaining intermetallides are presented. There was also an extensive examination of the spark plasma sintering method, which has recently become widespread. The elemental and phase composition of materials obtained by spark-plasma sintering and their change in the obtained depths of dispersed precursors are investigated. The workpieces obtained by spark plasma welding and by self-propagating high-temperature synthesis are also considered. The diffusion pair method and the directed crystallization method were discussed. Particular attention was paid to the formation of the obtained intermetallites using spark plasma sintering technology, conclusions were drawn about the prospects of spark plasma treatment. The characteristics of the phase equilibrium of a triple system based on titanium, the phase composition of the corresponding alloys and their structures are considered.