Features of (Ti, Me)C solid solution formation

The structure and phase composition of the products of combined carbothermal reduction of titanium and niobium (tantalum) oxides with an excess of carbon are studied. It is established that formation of solid solutions (Ti, Nb)C and (Ti, Ta)C occurs through successive stages of synthesis of the indi...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2006-01, Vol.45 (1-2), p.14-19
Main Authors: Kud, I V, Likhoded, L S, Eremenko, L I, Makarenko, G N, Fedorus, V B, Prilutskii, E V
Format: Article
Language:English
Subjects:
Carbon
Dispersions
Dissolution
Powder metallurgy
Reduction
Solid solutions
Titanium
Titanium carbide
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Summary:The structure and phase composition of the products of combined carbothermal reduction of titanium and niobium (tantalum) oxides with an excess of carbon are studied. It is established that formation of solid solutions (Ti, Nb)C and (Ti, Ta)C occurs through successive stages of synthesis of the individual carbides followed by dissolution of TiC in NbC (TaC). Excess of carbon provides high dispersion of the reduction products and their purity with respect to oxygen. Features of solid solution (Ti, Nb)C formation with interaction of niobium oxide and titanium carbide with an excess of carbon (12 mass%) are studied. Use of fine-grained titanium carbide, pure with respect to oxygen, with excess carbon made it possible to reduce by 300 deg C the temperature for forming homogenous solid solution and to obtain powder with a particle size of less than 8 fan without grinding.
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-006-0036-7