Disorder-order phase transformations and electrical resistivity of nonstoichiometric titanium carbide |
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Authors: | V N Lipatnikov L V Zueva A I Gusev A Kottar |
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Institution: | 1. Institute for Solid-State Chemistry, Ural Branch of the Russian Academy of Sciences, 620219, Ekaterinburg, Russia 2. Institut für Experimentalphysik, Technische Universit?t Wien, A-1040, Wien, ?sterreich, Austria
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Abstract: | Phase transformations of the disorder-order type in the homogeneity region of nonstoichiometric titanium carbide TiCy (0.5<y<1.0) have been studied. It has been established that, depending on the actual composition of TiCy, there may form in it for T<980–1000 K a cubic or a trigonal ordered Ti2C phase (space groups Fd3m and
, respectively) and a rhombic ordered Ti3C2 phase (space group C2221). The effect of ordering on the electrical resistivity of the nonstoichiometric carbide TiCy was studied, and the temperatures of the reversible disorder-order equilibrium transitions determined. The ordering in titanium
carbide is shown to be a first-order phase transition.
Fiz. Tverd. Tela (St. Petersburg) 40, 1332–1340 (July 1998) |
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