Premium
Observation of the Recrystallization Process in Pure Nb and Zr Using Positron Lifetime Spectroscopy and XRD Techniques
Author(s) -
Dryzek Jerzy,
Wróbel Mirosław
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800051
Subject(s) - nucleation , recrystallization (geology) , materials science , annealing (glass) , positron , spectroscopy , grain boundary , positron lifetime spectroscopy , crystallography , analytical chemistry (journal) , metallurgy , microstructure , thermodynamics , positron annihilation , nuclear physics , chemistry , physics , paleontology , chromatography , quantum mechanics , electron , biology
Results of research on the recrystallization of highly deformed Nb and Zr with the use of positron lifetime spectroscopy and XRD measurements are presented here. A significant decrease in positron lifetime during annealing of deformed Nb and Zr samples is observed, which is clearly correlated with changes in the pole figures and reduction of the crystal lattice strain of the tested samples. This indicates their recrystallization, that is, nucleation and growth of new, defect free grains. Application of the positron diffusion trapping model to description of the obtained dependencies allows us to determine the activation energy of migration of grain boundary in both metals, which is 2.26 ± 0.4 eV and 1.33 ± 0.6 eV for Nb and Zr, respectively.