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Article Dans Une Revue Journal of Alloys and Compounds Année : 2013

Experimental determination of the Ta-Ge phase diagram

Résumé

In the present work, the Ta-Ge phase diagram has been experimentally studied, considering the inexistence of a Ta-Ge phase diagram in the literature. The samples were prepared via arc melting and characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-ray Diffraction (XRD). The intermetallics phases beta Ta3Ge, alpha Ta3Ge, beta Ta5Ge3 and TaGe2 where confirmed in this system. Three eutectics reactions where determined with the liquid compositions at 20.5; 28.0; 97.0 at.% Ge. The phases beta Ta3Ge and beta Ta5Ge3 solidifies congruently while TaGe2 is formed through a peritectic transformation. The temperature of the Ta-rich eutectic (L <-> Ta-ss + beta Ta3Ge) was measured by the Pirani-Alterthum method at 2440 degrees C and the Ge-rich eutectic (L <-> TaGe2 + Ge-ss) by DTA at 937 degrees C.

Dates et versions

hal-01289989 , version 1 (17-03-2016)

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Antonio Augusto Araujo Pinto Da Silva, Gilberto Carvalho Coelho, Carlos Angelo Nunes, Paulo Atsushi Suzuki, Jean Marc Fiorani, et al.. Experimental determination of the Ta-Ge phase diagram. Journal of Alloys and Compounds, 2013, 576, pp.38-42. ⟨10.1016/j.jallcom.2013.04.070⟩. ⟨hal-01289989⟩
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