najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2021-12-5-641-649najo-547Research ArticleCHEMISTRY AND MATERIAL SCIENCEХИМИЯ И МАТЕРИАЛОВЕДЕНИЕFormation of titanium-cobalt nitride Ti0.7Co0.3N under plasma-chemical synthesis conditions in a low-temperature nitrogen plasmaФормирование нитрида титана-кобальта Ti0.7Co0.3N в условиях плазмохимического синтеза в низкотемпературной азотной плазмеAvdeevaYu. A.AvdeevaYu. A.

Pervomaiskaya Street, 91, Ekaterinburg, 620990

y-avdeeva@list.ruLuzhkovaI. V.LuzhkovaI. V.

Pervomaiskaya Street, 91, Ekaterinburg, 620990

key703@yandex.ruErmakovA. N.ErmakovA. N.

Pervomaiskaya Street, 91, Ekaterinburg, 620990

ermakovihim@yandex.ruInstitute of Solid State Chemistry, Ural Branch, Russian Academy of SciencesRussian Federation202105082025125641649Copyright © Avdeeva Y.A., Luzhkova I.V., Ermakov A.N., 20252025Avdeeva Y.A., Luzhkova I.V., Ermakov A.N.Avdeeva Y.A., Luzhkova I.V., 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/547

Nanocompositions with “core-shell” structure are of interest in different areas of materials science and solid state chemistry, since, along with traditional refractory components in the form of carbides or nitrides and individual metals (Ni, Co), phases of mixed composition of the type Me11−xMe2xN (Me1 – a refractory element of IV-VIA subgroup, Me2 – Ni or Co) are formed during synthesis within one highly dispersed particle. It should be noted that such multicomponent phase components are metastable and cannot be obtained in an individual state. At the same time, phases of the Me11−xMe2xN type are formed in systems with participation of nitride compounds during extreme processing. In the present work, the technology of plasma-chemical synthesis with subsequent recondensation of gaseous nitrogen in a rotating cylinder was used.

The work is aimed at obtaining metastable complex-substituted titanium-cobalt nitride Ti0.7Co0.3N in the framework of nano- and ultradispersed Ti(Mo)C–Co “core-shell” structures. All phase components of the claimed compositions were determined by X-ray diffraction. Additionally, Ti(Mo)C–Co nanoparticles were studied by high-resolution transmission electron microscopy and electron diffraction. It was determined that Ti0.7Co0.3N has a strongly deformed stressed state, as evidenced by a single reflection (101) on the X-ray diffraction pattern. The paper also considers some aspects of crystal chemical design of Ti0.7Co0.3N obtained in the course of structural and morphological certification of the Ti(Mo)C–Co nanocomposition.

Нанокомпозиции со структурой «ядро-оболочка» представляют интерес в различных областях материаловедения и химии твердого тела, так как наряду с традиционными тугоплавкими компонентами в виде карбидов или нитридов и индивидуальных металлов (Ni, Co) в них появляются фазы смешанного состава. типа Me11-xMe2xN (Me1 – тугоплавкий элемент IV-VIA подгруппы, Me2 – Ni или Co), образующиеся при синтезе в составе одной высокодисперсной частицы. Следует отметить, что такие многокомпонентные системы являются метастабильными и не могут быть получены в индивидуальном состоянии. В то же время в системах с участием нитридных соединений при экстремальной обработке образуются фазы типа Me11-xMe2xN. В настоящей работе использовалась технология плазмохимического синтеза с последующей переконденсацией газообразного азота во вращающемся цилиндре. Работа направлена на получение метастабильного нитрида титана-кобальта Ti0.7Co0.3N в рамках нано- и ультрадисперсных структур Ti(Mo)C-Co «ядро-оболочка». Все фазовые компоненты заявляемых композиций определены методом рентгеновской дифракции. Дополнительно наночастицы Ti(Mo)C–Co исследовали методами просвечивающей электронной микроскопии высокого разрешения и электронной дифракции. Установлено, что Ti0.7Co0.3N имеет сильнодеформированное напряженное состояние, о чем свидетельствует одиночный рефлекс (101) на рентгенограмме. В работе также рассмотрены некоторые аспекты кристаллохимического дизайна Ti0.7Co0.3N, полученные в ходе структурно-морфологической аттестации нанокомпозиции Ti(Mo)C–Co.

нитрид титана-кобальтаядро-оболочкаплазменная реконденсациянизкотемпературная плазмарентгенофазовый анализпросвечивающая электронная микроскопия высокого разрешенияtitanium-cobalt nitridecore-shell structureplasma recondensationlow temperature plasmaX-ray phase analysishigh-resolution transmission electron microscopyThe 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”). The authors are grateful to Dr. A. M. Murzakaev, Ph. 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The authors declare that there are no conflicts of interest present.