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High‐voltage electron microscope high‐temperature in situ straining experiments to study dislocation dynamics in intermetallics and quasicrystals
Author(s) -
Messerschmidt U.
Publication year - 2001
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 - 10.1046/j.1365-2818.2001.00908.x
Subject(s) - intermetallic , dislocation , materials science , quasicrystal , condensed matter physics , electron microscope , diffusion , transmission electron microscopy , electron , metallurgy , thermodynamics , composite material , nanotechnology , optics , physics , alloy , quantum mechanics
The dynamic behaviour of dislocations in several intermetallic alloys, studied by in situ straining experiments in a high‐voltage electron microscope, is compared at room temperature and at high temperatures. In contrast to room temperature, the dislocations move viscously at high temperatures, which is explained by diffusion processes in the dislocation cores. In quasicrystals, the viscous dislocation motion can be interpreted by models on the cluster scale.