kaz44Вестник Университета Шакарима. Серия технические наукиBulletin of Shakarim University. Technical Sciences2788-79953006-0524«Шәкәрім университеті» КеАҚ10.53360/2788-7995-2025-3(19)-55kaz44-2053Research ArticleТЕХНИЧЕСКАЯ ФИЗИКА И ТЕПЛОЭНЕРГЕТИКАВЛИЯНИЕ РЕЖИМА НАПЫЛЕНИЯ И ВАКУУМНОГО ОТЖИГА НА МИКРОСТРУКТУРУ И ИЗНОСОСТОЙКОСТЬ ВЫСОКОЭНТРОПИЙНЫХ ПОКРЫТИЙ CoCrFeNiMn ПОЛУЧЕННЫХ МЕТОДОМ ПЛАЗМЕННОГО НАПЫЛЕНИЯEFFECT OF SPRAYING REGIME AND VACUUM ANNEALING ON THE MICROSTRUCTURE AND WEAR RESISTANCE OF PLASMA-SPRAYED CoCrFeNiMn HIGH ENTROPY COATINGShttps://orcid.org/0000-0002-0838-6724КамбаровЕ. Е.KambarovY.

Едилжан Ержанулы Камбаров – Научный сотрудник

070002, Республика Казахстан, г. Усть-Каменогорск, ул.30-ой Гвардейской дивизии, 34

Yedilzhan Yerzhanuly Kambarov – Researcher at RC «Surface engineering and Tribology»

070002, Republic of Kazakhstan, Ust-Kamenogorsk, 34 30th Guards Division Street

yedilzhan@mail.ruНИЦ «Инженерия поверхностей и трибология», Университет имени С. АманжоловаКазахстанResearch Center «Surface Engineering and Tribology», S. Amanzholov EKUKazakhstan20250311202503(19)490496Copyright © Камбаров Е.Е., 20252025Камбаров Е.Е.Kambarov Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://tech.vestnik.shakarim.kz/jour/article/view/2053

В данном исследовании покрытия на основе высокоэнтропийного сплава CoCrFeNiMn были нанесены на подложки из нержавеющей стали 316L с помощью воздушно-плазменного напыления с двумя различными режимами. После напыления покрытия были подвергнуты вакуумному отжигу при 500°C. Целью работы было изучение влияния скорости потока водорода и последующего отжига на фазовый состав, микроструктуру и механические свойства покрытий. Рентгеновский фазовый анализ показал, что во всех образцах преобладает гранецентрированная кубическая (ГЦК) структура, но после отжига, особенно в режиме APS 2, наблюдается образование σ-фазы и оксидных фаз MnO и MnCr₂O₄. По данным РЭМ/ЭРС установлена слоистая микроструктура, типичная для напыленных воздушно-плазменным распылением покрытий, и повышенное содержание кислорода в верхней зоне покрытий после отжига. Наибольшая микротвердость 390 HV₀,₂ была зафиксирована для покрытия APS 2a, что связано с образованием твердых вторичных фаз. Однако испытания на износ показали, что наилучшая износостойкость наблюдалась у покрытий, полученных с использованием режимов APS 1 и APS 1a, благодаря более стабильной фазовой структуре и меньшей склонности к окислению. Полученные результаты подчеркивают важность комплексной оптимизации параметров напыления и условий отжига для улучшения эксплуатационных характеристик покрытий на основе ВЭС в условиях трения и износа.

In this study, coatings based on a high-entropy CoCrFeNiMn alloy were deposited on 316L stainless steel substrates using air plasma spraying with two different regimes. After spraying, the coatings were vacuum annealed at 500°C. The aim of the work was to study the effect of hydrogen flow rate and subsequent annealing on the phase composition, microstructure, and mechanical properties of the coatings. X-ray phase analysis showed that a face-centered cubic (FCC) structure dominates in all samples, but after annealing, especially in the regime APS 2, the formation of σ-phase and oxide phases MnO and MnCr₂O₄ is observed. According to SEM/EDS data, a layered microstructure typical for air plasma sprayed coatings and an increased oxygen content in the upper zone of the coatings after annealing were established. The highest microhardness of 390 HV₀.₂ was recorded for the APS 2a coating, which is associated with the formation of hard secondary phases. However, wear tests showed that the best wear resistance was observed in coatings obtained using the APS 1 and APS 1a regimes, due to a more stable phase structure and a lower tendency to oxidation. The results obtained emphasize the importance of comprehensive optimization of spraying parameters and annealing conditions to improve the performance characteristics of HEA based coatings under friction and wear conditions.

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