Study of the synthesis of nanocrystalline mixed tantalum–zirconium carbide

The synthesis conditions of refractory tantalum–zirconium carbide Ta 0.8 Zr 0.2 C on the basis of Ta 2 O 5 –ZrO 2 –C ultrafine initial blend prepared via the sol–gel method are explored. The initial blend is prepared via hydrolysis in the presence of Ta(OC 5 H 11 ) 5 and [Zr(O 2 C 5 H 7 ) 4– x (OC 5...

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Bibliographic Details
Published in:Physics of atomic nuclei 2015-12, Vol.78 (12), p.1357-1365
Main Authors: Simonenko, E. P., Simonenko, N. P., Ezhov, Yu. S., Sevastyanov, V. G., Kuznetsov, N. T.
Format: Article
Language:English
Subjects:
Carbides
CARBON SOURCES
CARBONIZATION
CRYSTALS
DRYING
HYDROLYSIS
MATERIALS SCIENCE
NANOSTRUCTURES
OXIDATION
Particle and Nuclear Physics
PARTICLE SIZE
Physics
Physics and Astronomy
POLYMERS
REFRACTORIES
SOL-GEL PROCESS
SYNTHESIS
TANTALUM OXIDES
Technology of Nuclear Materials
TEMPERATURE DEPENDENCE
Zirconium
ZIRCONIUM CARBIDES
ZIRCONIUM OXIDES
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Summary:The synthesis conditions of refractory tantalum–zirconium carbide Ta 0.8 Zr 0.2 C on the basis of Ta 2 O 5 –ZrO 2 –C ultrafine initial blend prepared via the sol–gel method are explored. The initial blend is prepared via hydrolysis in the presence of Ta(OC 5 H 11 ) 5 and [Zr(O 2 C 5 H 7 ) 4– x (OC 5 H 11 ) x ] carbon source polymer solutions, gel drying, and carbonization at a temperature of 450°C. A series of the carbothermal synthesis experiments is implemented at various temperatures and exposure times. The synthesis conditions are shown to affect not only the phase composition of products but also their oxidation resistance related to the particle size.
ISSN:1063-7788
1562-692X
DOI:10.1134/S106377881512011X