Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

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

Journal Article · · Journal of Solid State Chemistry
 [1];  [2];  [3];  [4];  [1];  [3];  [5];  [1]
  1. Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria)
  2. Masaryk University, Department of Chemistry, Kolarska 2, 611 37, Brno (Czech Republic)
  3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang (China)
  4. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 61662 Brno (Czech Republic)
  5. Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Wien (Austria)
+ Show Author Affiliations

Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Three ternary phases were found: {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3}-type), {tau}{sub 2}-Ta(Ta,V,Si){sub 2} (MgZn{sub 2}-type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} (MgCu{sub 2}-type). The crystal structure of {tau}{sub 2}-Ta(Ta,V,Si){sub 2} was solved by X-ray single crystal diffraction (space group P6{sub 3}/mmc). Atom order in the crystal structures of {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3} type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} was derived from X-ray powder diffraction data. A large homogeneity range was found for {tau}{sub 1}-(Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} revealing random exchange of Ta and V at a constant Si content. At 1500 Degree-Sign C, the end points of the {tau}{sub 1}-phase solution (0.082{<=}x{<=}0.624) are in equilibrium with the solutions (Ta{sub 1-x}V{sub x}){sub 5}Si{sub 3} (Cr{sub 5}B{sub 3} type, 0{<=}x{<=}0.128) and (Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} (W{sub 5}Si{sub 3} type, 0{<=}x{<=}0.048). - Graphical abstract: Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Black-Right-Pointing-Pointer Three ternary phases were found at 1500 Degree-Sign C. Black-Right-Pointing-Pointer At 1500 Degree-Sign C, {tau}{sub 1}-phase has large homogeneity region (0.064{<=}x{<=}0.624).

OSTI ID:
22012048
Journal Information:
Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. . 187; ISSN 0022-4596; ISSN JSSCBI
Country of Publication:
United States
Language:
English

Similar Records

The systems Sr-Zn-{l_brace}Si,Ge{r_brace}: Phase equilibria and crystal structure of ternary phases
Journal Article · Tue Feb 14 23:00:00 EST 2012 · Journal of Solid State Chemistry · OSTI ID:21612895
EBSD characterization of high-temperature phase transformations in an Al-Si coating on Cr-Mo steel
Journal Article · Tue Feb 14 23:00:00 EST 2012 · Materials Characterization · OSTI ID:22066414
Phase relations and structural features in the system Ni-Zn-B
Journal Article · Thu Feb 14 23:00:00 EST 2013 · Journal of Solid State Chemistry · OSTI ID:22150012

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
MICROSTRUCTURE
MONOCRYSTALS
PHASE DIAGRAMS
SPACE GROUPS
TERNARY ALLOY SYSTEMS
TUNGSTEN SILICIDES
X-RAY DIFFRACTION