A first HREM observation of the ordered carbon sublattice in a transition-metal carbide (VC1-x) |
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| Authors: | T Epicier Y Kumashiro |
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| Institution: | 1. Groupes d'Etudes de Métallurgie Physique et de Physique des Matériaux , INSA , B[acaron]t. 502, 69621, Villeurbanne Cedex, France;2. Electrotechnical Laboratory , 1-1-4, Umezono, Sakura-Mura, Niihari-gun, Ibaraki, Japan |
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| Abstract: | Abstract The microstructure of long-range-ordered vanadium carbides based on V6C5 has been analysed by means of high-resolution electron microscopy (HREM). Lattice images have been produced by including in the objective-aperture superlattice spots associated with the ordered distribution of vacancies in the interstitial carbon sublattice of these substoichiometric compounds: ‘perfectly’ ordered structures have been imaged, and a direct discussion of the experimental micrographs is made in terms of positions of the vacancy-containing columns. This HREM study will soon be extended to theinvestigation of various kinds of planar defects within differently annealed specimens. |
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