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Evidence of dislocation dissociation in nearly stoichiometric tantalum carbide using the weak‐beam technique
Author(s) -
Martin J. L.
Publication year - 1973
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1973.tb03825.x
Subject(s) - dissociation (chemistry) , tantalum , materials science , stoichiometry , carbide , dislocation , tantalum carbide , stacking , stacking fault , stacking fault energy , crystallography , partial dislocations , condensed matter physics , nuclear magnetic resonance , chemistry , metallurgy , composite material , physics
SUMMARY The dissociation of dislocations in nearly stoichiometric tantalum carbide has been revealed by the weak‐beam technique; this is in agreement with the assumptions of a model of dislocation glide which had been derived for this compound. An order of magnitude of the partial spacing for the screw and the edge dislocation is 2·7 and 5.2 nm respectively, which leads to a stacking‐fault energy of about 170 mJ m −2 (erg cm −2 ).