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Dislocations and Plastic Deformation In Molybdenum Disilicide
Author(s) -
Unal Ozer,
Petrovic John J.,
Carter David H.,
Mitchell T.E.
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb09824.x
Subject(s) - substructure , materials science , tetragonal crystal system , burgers vector , slip (aerodynamics) , whiskers , dislocation , transmission electron microscopy , partial dislocations , crystallography , grain boundary , lattice (music) , composite material , condensed matter physics , metallurgy , crystal structure , microstructure , structural engineering , nanotechnology , thermodynamics , chemistry , physics , acoustics , engineering
A composite of MoSi 2 (reinforced with SiC whiskers) has been deformed at high temperatures and the resulting dislocation substructure studied by means of transmission electron microscopy (TEM). Classical g.b analysis of the dislocations in the MoSi 2 matrix has shown that the Burgers vectors are (100), (110), and 1/2(111) which are the shortest lattice vectors in the body‐centered tetragonal lattice. Trace analysis showed that there are numerous possible slip planes for each of the determined slip directions. This result suggests that various operative slip systems can contribute to the deformation, depending on the orientation of the particular grain with respect to the stress state.