The objects of study are nanostructured thermoelectric materials for efficient conversion of excess heat to electric power. The materials under study are half-Heusler alloys based on Ni(M)Sn, where M =Ti, Hf, Zr in various ratios. The results of preparation of nanoscale powders of Ni 0.33 (Ti 0.23 Zr 0.44 Hf 0.43 ) 0.33 Sn 0.33 and Ni 0.33 (Ti 0.5 Zr 0.5 ) 0.33 (Sn 0.99 Sb 0.01 ) 0.33 compositions are presented.Their structure and size characteristics are studied by electron microscopy and laser diffraction. The process of powder sintering into a bulk nanostructured material by rapid hot pressing is described; synthesis parameters are presented. The thermal diffusivities of consolidated samples are measured.

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As part of the strategic research program of state corporation Rosatom, carried out by the Technological Platform “Closed Nuclear Fuel Cycle with Fast Neutron Reactors”, a research to equip protective cells with original equipment, including ultrasonic flaw detectors for primary post-reactor non-destructive research of the properties of critical materials of fast neutron reactors, is being performed. In this paper, we present a method developed for determining corrosion damage of fuel claddings by the acoustic resonance method in hot chamber conditions, and a description of the experimental installation.