najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2023-14-1-132-141najo-206Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХPlasma-chemical synthesis of nanocrystalline “core-shell” structures TiN–Mo–CoПлазмохимический синтез нанокристаллических структур «ядро-оболочка» TiN-Mo-Cohttps://orcid.org/0000-0002-1470-0476АвдееваЮ. А.AvdeevaYu. A.

Авдеева Юлия Александровна, 

Екатеринбург.

Yuliya A. Avdeeva,

Pervomaiskaya Street, 91, Ekaterinburg, 620990.

y-avdeeva@list.ruhttps://orcid.org/0000-0001-9123-5371ЛужковаИ. В.LuzhkovaI. V.

Лужкова Ирина Викторовна,

Екатеринбург.

Irina V. Luzhkova,

Pervomaiskaya Street, 91, Ekaterinburg, 620990.

key703@yandex.ruhttps://orcid.org/0000-0003-4440-427XМурзакаевА. М.MurzakaevA. M.

Мурзакаев Айдар Марксович,

Екатеринбург.

Aidar M. Murzakaev,

Amundsen Street, 106 Ekaterinburg, 620216.

aidar@iep.uran.ruhttps://orcid.org/0000-0002-2746-5292ЕрмаковА. Н.ErmakovA. N.

Ермаков Алексей Николаевич,

Екатеринбург.

Alexey N. Ermakov,

Pervomaiskaya Street, 91, Ekaterinburg, 620990.

ermakovihim@yandex.ruInstitute of Solid State Chemistry, Ural Branch, Russian Academy of SciencesRussian FederationInstitute of Electrophysics, Ural Branch, Russian Academy of SciencesRussian Federation202305062025141132141Copyright © Avdeeva Y.A., Luzhkova I.V., Murzakaev A.M., Ermakov A.N., 20252025Авдеева Ю.А., Лужкова И.В., Мурзакаев А.М., Ермаков А.Н.Avdeeva Y.A., Luzhkova I.V., Murzakaev A.M., Ermakov A.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/206

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 H2O2 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.

В настоящей работе проведено исследование возможностей формирования нанокристаллических композиций на основе нитрида титана с участием Mo и Co в условиях плазмохимического синтеза. Синтез организован по схеме плазменной переконденсации с применением низкотемпературной азотной плазмы. Все полученные высокодисперсные порошковые композиции были аттестованы методами рентгенографии и растровой электронной микроскопии. Характеристики дисперсного состава переконденсированных продуктов TiN-Mo-Co определялись путем расчета на основе сведений о пикнометрической плотности и площади удельной поверхности.

Подтверждение возможности формирования структуры «ядро-оболочка» осуществлялось химическими методами путем протравливания ультра- и нанодисперсных порошков в растворах разбавленной HCl для удаления кобальтовой оболочки и концентрированной перекиси водорода H2O2 для нейтрализации металлического Mo.

Исходя из сведений о «квазиравновесном состоянии» продуктов плазмохимического синтеза в низкотемпературной газовой плазме предложена химическая модель формирования нанокристаллических частиц.

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The authors declare that there are no conflicts of interest present.