Structure des Carbures de Niobium
- 1 February 1964
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 3 (2)
- https://doi.org/10.1143/jjap.3.104
Abstract
The preparation of thin films of two niobium carbides, NbC and Nb2C, for electron diffraction studies has been accomplished by heating in vacuo double evaporated films (carbon+Nb). NbC is formed by a carburization process in high vacuum, whilst thin films of Nb2C are produced by decomposition of NbC in air at reduced pressure (10-2∼10-3 Torr) by the reaction 2 NbC+O2 → Nb2C+CO2. The crystal structure of NbC is based on the f.c.c. lattice of Nb atoms and the carbon atoms occupy interstitial positions in a statistical manner. Nb2C, however, shows a hexagonal superlattice structure of the same type as that of ε-phase of Fe2N.Keywords
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