Plasmachemical processing of titanium carbide and nickelide in a low-temperature nitrogen plasma

Luzhkova, I. V.; Ermakov, A. N.; Григоров, И. Г.; Zainulin, Yu. G.; Dobrinskii, E. K.; Malashin, S. I.

doi:10.1134/s0036029513010084

Cited by 4 publications

(1 citation statement)

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“…As previous studies show, the use of plasma-chemical synthesis for the recondensation of microcrystalline materials, such as titanium nickelide [5] or mechanical mixtures based on TiC [6], VC, VN [7] with metallic nickel, allows the formation of "core-shell" structures. A refractory compound based on elements of IV-VIA subgroups of the Periodic Table acts as the core, and the peripheral shell is presented in the form of Ni of cubic modification.…”

Section: Introductionmentioning

confidence: 98%

Plasma-chemical synthesis of nanocrystalline "core-shell" structures TiN-Mo-Co

Avdeeva¹,

Luzhkova²,

Мурзакаев³

et al. 2023

Nanosystems: Phys. Chem. Math.

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In this work, the possibilities of formation of nanocrystalline powders based on titanium nitride with participation of Mo and Co under conditions of plasma-chemical synthesis have been studied. Synthesis was performed according to the plasma recondensation scheme using low-temperature nitrogen plasma. All the obtained highly dispersed powders were certified by X-ray diffraction and scanning electron microscopy. The characteristics of the disperse composition of the recondensed TiN-Mo-Co products were determined by the calculation based on the pycnometric density and specific surface area data. The possibility of formation of a "core-shell" structure was confirmed using chemical methods by etching ultraand nanodispersed powders in solutions of dilute HCl to remove the cobalt shell and concentrated hydrogen peroxide H 2 O 2 to neutralize metallic Mo. Based on the information about "quasi-equilibrium state" of the products of plasma-chemical synthesis in a low-temperature gas plasma, a chemical model for the formation of nanocrystalline particles is proposed. KEYWORDS core-shell structure, titanium nitride, plasma-chemical synthesis, temperature barrier, phase formation ACKNOWLEDGEMENTS The authors are grateful to Dr. E. K. Dobrinsky, Ph. D., leading researcher of SSC RF JSC "GNIIChTEOS" for help in carrying out the plasma-chemical synthesis. The work was carried out in accordance with the state assignment for the Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences (theme No 0397-2019-0003 "New functional materials for promising technologies: synthesis, properties, spectroscopy and computer simulation").

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Section: Introductionmentioning

confidence: 98%