The system Ta–V–Si: Crystal structure and phase equilibria

Investor logo

Warning

This publication doesn't include Faculty of Arts. It includes Central European Institute of Technology. Official publication website can be found on muni.cz.
Authors

KHAN Atta Ullah BROŽ Pavel NIU Haiyang Y. BURŠÍK Jiří GRYTSIV Andrei CHEN Xing Qiu GIESTER Gerald ROGL Peter Franz

Year of publication 2012
Type Article in Periodical
Magazine / Source Journal of Solid State Chemistry
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://www.sciencedirect.com/science/article/pii/S0022459611006943
Doi http://dx.doi.org/10.1016/j.jssc.2011.12.024
Field Physical chemistry and theoretical chemistry
Keywords Ternary alloy system; Microstructure; Phase diagram; Crystal structures
Description Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 C. Three ternary phases were found: tau1-(Ta,V)5Si3 (Mn5Si3-type), tau2-Ta(Ta,V,Si)2 (MgZn2-type) and tau3-Ta(Ta,V,Si)2 (MgCu2-type). The crystal structure of tau2-Ta(Ta,V,Si)2 was solved by X-ray single crystal diffraction (space group P63/mmc). Atom order in the crystal structures of tau1-(Ta,V)5Si3 (Mn5Si3 type) and tau3-Ta(Ta,V,Si)2 was derived from X-ray powder diffraction data. A large homogeneity range was found for tau1-(TaxV1-x)5Si3 revealing random exchange of Ta and V at a constant Si content. At 1500 C, the end points of the tau1-phase solution (0.082-x-0.624) are in equilibrium with the solutions (Ta1-xVx)5Si3 (Cr5B3 type, 0-x-0.128) and (TaxV1-x)5Si3 (W5Si3 type, 0-x-0.048).
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.