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The physical processes of radiation compaction of powder materials during sintering

DOI 10.18127/j22250999-201804-03


M.V. Vedyashkin ‒ Ph.D. (Eng.), Associate Professor, National Research Tomsk Polytechnic University

The estimation of the effect of radiation activation of the process of compaction of lithium-titanium ferrite compacts from powders with different concentration of preradiation nonequilibrium defectiveness, the content of which was regulated by thermal heating of powders immediately before pressing samples, was made. It is concluded that the mechanism of threshold dislocation creep is responsible for the early stages of the sintering of ferrite powders, and the activating role of radiation is due to the inhibition of the annealing of dislocation defects. At later stagesother mechanisms of mass transfer (for example, mechanisms of volume self-diffusion) dominate, and only at these stages it is possible to expect the manifestation of radiation effects on the model of radiation-stimulated diffusion.

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