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Thermally Activated Deformation of Potassium
Author(s) -
Bernstein I. M.,
Li J. C. M.
Publication year - 1967
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.19670230213
Subject(s) - impurity , materials science , crystallite , deformation (meteorology) , condensed matter physics , lattice (music) , deformation mechanism , crystal structure , composite material , crystallography , chemistry , metallurgy , physics , microstructure , organic chemistry , acoustics
The thermally activated deformation of single crystal and polycrystalline potassium is examined. It is shown that the activation parameters describing low‐temperature deformation can be correlated reasonably well with the b.c.c. transition metals on the basis of their respective shear moduli. This supports the suggestion that the same general mechanism controls low‐temperature deformation for all b.c.c. materials. The possibility of this mechanism being either impurity or lattice controlled is examined and it is shown that the Peierls‐Nabarro lattice resistance model adequately explains the experimental behavior. The possible role of impurities at low temperatures is briefly considered.