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Calculations on the Mechanical Energy of Vacancy Condensation Loops, Stacking Fault Tetrahedra, and Voids
Author(s) -
Sigler J. A.,
KuhlmannWilsdorf D.
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.19670210212
Subject(s) - burgers vector , vacancy defect , tetrahedron , hexagonal crystal system , stacking fault energy , materials science , diamond , stacking fault , crystallography , stacking , condensation , aluminium , void (composites) , condensed matter physics , chemistry , thermodynamics , physics , metallurgy , dislocation , composite material , nuclear magnetic resonance
Employing the most accurate theoretical expressions known for the energy of five different types of vacancy condensation products, the relative stabilities of these are evaluated by means of a B 5500 computer. The calculations are performed for the cases of aluminum, nickel, platinum, copper, gold, and silver, while the defects considered are the hexagonal Frank loop on {111} with 1/3 <111> as Burgers vector, two perfect loops with 1/2 <110> Burgers vectors, one of these being hexagonal on {111} the other diamond‐shaped on {110}, further the spherical void and, finally, the stacking fault tetrahedron. By comparing the results of the calculation with experimental evidence, some broad agreement is found, but also some quite important discrepancies. These are discussed theoretically.