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

KHAN, Atta Ullah, Pavel BROŽ, Haiyang Y. NIU, Jiří BURŠÍK, Andrei GRYTSIV, Xing Qiu CHEN, Gerald GIESTER and Peter Franz ROGL. The system Ta–V–Si: Crystal structure and phase equilibria. Journal of Solid State Chemistry. Elsevier, 2012, vol. 187, Mar, p. 114-123. ISSN 0022-4596. Available from: https://dx.doi.org/10.1016/j.jssc.2011.12.024.

Basic information

• Original name: The system Ta–V–Si: Crystal structure and phase equilibria
• Name in Czech: Soustava Ta-V-Si: Krystalová struktura a fázové rovnováhy
• Authors: KHAN, Atta Ullah (40 Austria), Pavel BROŽ (203 Czech Republic, guarantor, belonging to the institution), Haiyang Y. NIU (156 China), Jiří BURŠÍK (203 Czech Republic), Andrei GRYTSIV (40 Austria), Xing Qiu CHEN (156 China), Gerald GIESTER (40 Austria) and Peter Franz ROGL (40 Austria).
• Edition: Journal of Solid State Chemistry, Elsevier, 2012, 0022-4596.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10403 Physical chemistry
• Country of publisher: Netherlands
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 2.040
• RIV identification code: RIV/00216224:14740/12:00059368
• Organization unit: Central European Institute of Technology
• Doi: http://dx.doi.org/10.1016/j.jssc.2011.12.024
• UT WoS: 000301011800018
• Keywords (in Czech): soustava ternárních slitin; mikrostruktura; fázový diagram; krystalové struktury
• Keywords in English: Ternary alloy system; Microstructure; Phase diagram; Crystal structures
• Tags: ok, rivok

Abstract

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).

Abstract (in Czech)

Byly vyhodnoceny fázové poměry v soustavě Ta–V–Si při 1500 a 1200 C. Byly nalezeny tři ternární fáze tau1, tau2 a tau3.

Links

• ED1.1.00/02.0068, research and development project: Name: CEITEC - central european institute of technology
• MSM0021622410, plan (intention): Name: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Investor: Ministry of Education, Youth and Sports of the CR, Physical and chemical properties of advanced materials and structures