Potential of the high-energy hot compaction in a vacuum for creating materials with an ultrafine structure and high strength

The typical form of specimens prepared by high-energy hot pressing in a vacuum using different deformation schemes and also the results of studying compaction, structure formation, and the physicomechanical properties of different materials in relation to billet heating temperature are presented. The structure and properties of specimens prepared by vacuum sintering are given for comparison. The efficiency of high-energy pressing of single-phase materials (nickel and molybdenum) and two-phase composites (dispersion-strengthened nickel Ni - NiO and WC - Co hard alloys) is demonstrated. The method makes it possible to prepare compact billets at quite low temperatures that provides retention of a fine-grained structure within them. As a result of this the materials have high mechanical properties that exceed those of specimens prepared by traditional methods.