Thermal Explosion in Ta-Ti-Nb-V-W-C and Ta-Nb-V-Mo-W-C Powder Mixtures
S. G. Vadchenko, Yu. S. Vergunova, A. S. Rogachev, I. D. Kovalev, D. Yu. Kovalev
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Russia
Keywords: high-entropy alloys and carbides, thermal explosion, high-energy mechanical treatment
Abstract
The influence of the method and duration of mixing of the refractory metals Ta, Mo (Ti), Nb, V, and W with carbon (soot) on the formation of high-entropy carbides in the thermal explosion mode was investigated. The ignition temperature of the mixtures and the composition of the resulting products were determined depending on the method of preparing mixtures of metals with soot. Among the investigated methods of obtaining TaTiNbVWC5 and TaNbVMoWC5 high-entropy carbides, the multistep method of mixture preparation has been shown to be the most efficient. In the first step, a high-entropy solid solution of metals is prepared by high-energy mechanical treatment, after which soot is added to it and additional high-energy mechanical treatment is carried out. Thermal explosion of this mixture results in high-entropy carbides.
|
