Effect of powerful ultrasound on the combustion processes and phase composition of refractory compounds of titanium at the self-propagating high-temperature synthesis
https://doi.org/10.29235/1561-8323-2018-62-6-674-684
Abstract
The effect of ultrasound oscillations (USO) on the heat transfer conditions between a specimen and environment is examined using a specially developed experimental facility. The influence of the USO amplitude on the combustion temperature and velocity as well as on the phase composition and crystal lattice parameters of the synthesized compounds is studied for the self-propagating high-temperature synthesis (SHS) in Ti–С(Si,B) systems. The heat transfer coefficient on the surface of a specimen during its oscillations with an ultrasound frequency is assessed. Possible mechanisms of the effect of USO on the SHS process are considered. It is demonstrated that a decrease in the SHS temperature is connected with cooling the specimen due to forced convection of a surrounding gas, while a change in a phase composition of the synthesized material and the crystallographic parameters of the phases occurs due to changes in the conditions of high-temperature heterogeneous interactions in the SHS wave.
About the Authors
V. V. Klubovich
Belarusian National Technical University, Minsk
Belarus
Academician, D. Sc. (Engineering), Professor
Belarus
Academician, D. Sc. (Engineering), Professor
M. M. Kulak
Institute of Technical Acoustics of the National Academy of Sciences of Belarus, Vitebsk
Belarus
Ph. D. (Engineering), Senior researcher
Belarus
Ph. D. (Engineering), Senior researcher
B. B. Khina
Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk
Belarus
D. Sc. (Physics and Mathematics), Associate рrofessor, Chief researcher
Belarus
D. Sc. (Physics and Mathematics), Associate рrofessor, Chief researcher
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