powderИзвестия вузов. Порошковая металлургия и функциональные покрытияPowder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya)1997-308X2412-8767НИТУ "МИСИС"10.17073/1997-308X-2021-2-4-12powder-619Research ArticleТеория и процессы формования и спекания порошковых материаловTheory and Processes of Formation and Sintering of Powder MaterialsПолучение высокоэнтропийного сплава Fe–Cr–Co–Ni–Ti механическим сплавлением и электроискровым плазменным спеканием порошковой смесиProduction of high-entropy Fe–Cr–Co–Ni–Ti alloy by mechanical alloying and spark plasma sintering of a powder mixtureКочетовН. А.KochetovN. A.

Канд. физ.-мат. наук, ст. науч. сотрудник лаборатории динамики микрогетерогенных процессов

142432, Московская обл, Ногинский р-н, г. Черноголовка, ул. Акад. Осипьяна, 8

Cand. Sci. (Phys.-Math.), Senior researcher, Laboratory of dynamics of microheterogeneous processes

142432, Russia, Moscow reg., Chernogolovka, Acad. Osipyan str., 8

kolyan_kochetov@mail.ruРогачевА. С.RogachevA. S.

Докт. физ.-мат. наук, проф., зав. лабораторией динамики микрогетерогенных процессов

142432, Московская обл, Ногинский р-н, г. Черноголовка, ул. Акад. Осипьяна, 8

Dr. Sci. (Phys.-Math.), Prof., Head of the Laboratory of dynamics of microheterogeneous processes

142432, Russia, Moscow reg., Chernogolovka, Acad. Osipyan str., 8

rogachev@ism.ac.ruКовалевД. Ю.KovalevD. Yu.

Канд. техн. наук, зав. лабораторией рентгеноструктурных исследований

142432, Московская обл, Ногинский р-н, г. Черноголовка, ул. Акад. Осипьяна, 8

Cand. Sci. (Eng.), Head of the Laboratory of X-ray investi

142432, Russia, Moscow reg., Chernogolovka, Acad. Osipyan str., 8

kovalev@ism.ac.ruЩукинА. С.ShchukinA. S.

Канд. техн. наук, ст. науч. сотрудник лаборатории физического материаловедения

142432, Московская обл, Ногинский р-н, г. Черноголовка, ул. Акад. Осипьяна, 8

Cand. Sci. (Eng.), Senior researcher, Laboratory of materials science

142432, Russia, Moscow reg., Chernogolovka, Acad. Osipyan str., 8

shchukin@ism.ac.ruВадченкоС. Г.VadchenkoS. G.

Канд. физ.-мат. наук, ст. науч. сотрудник лаборатории динамики микрогетерогенных процессов

142432, Московская обл, Ногинский р-н, г. Черноголовка, ул. Акад. Осипьяна, 8

Cand. Sci. (Phys.-Math.), Senior researcher, Laboratory of dynamics of microheterogeneous processes

142432, Russia, Moscow reg., Chernogolovka, Acad. Osipyan str., 8

vadchenko@ism.ac.ruИнститут структурной макрокинетики и проблем материаловедения РАН (ИСМАН) им. А.Г. МержановаРоссияMerzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences (ISMAN)Russian Federation20212309202102412Copyright © НИТУ "МИСИС", 20212021НИТУ "МИСИС"НИТУ "МИСИС"https://powder.misis.ru/jour/about/submissions#copyrightNoticehttps://powder.misis.ru/jour/article/view/619

Методом высокоинтенсивной механической обработки (ВМО) многокомпонентной порошковой смеси Fe + Cr + Co + Ni + Ti получен двухфазный порошковый сплав на основе твердых растворов замещения с ОЦК- и ГЦК-решеткой. Шлифы образцов и частицы полученных смесей изучались на электронном сканирующем автоэмиссионном микроскопе сверхвысокого разрешения методом сканирующей электронной микроскопии. Рентгенограммы смесей регистрировались с помощью дифрактометра ДРОН 3 на FeKα- и CuKα-излучении. Выявлено, что после 10 мин ВМО на рентгенограмме остается один интенсивный суперпозиционный рефлекс, угловое положение которого отвечает рефлексам 111 и 110 фаз с ГЦК- и ОЦК-решеткой соответственно. Искровым плазменным спеканием (ИПС) при температурах 800 и 1000 °С из смеси после 90 мин ВМО получены образцы компактного высокоэнтропийного материала. Определены их удельное электросопротивление и плотность, а также зависимости этих характеристик от температуры спекания. Показано, что в процессе ИПС порошкового сплава, вероятно, происходит обогащение твердого раствора замещения с ОЦК- решеткой титаном.

A two-phase powder alloy based on substitutional solid solutions with BCC and FCC lattices was obtained by highintensity mechanical treatment (HMT) of a multicomponent Fe–Cr–Co–Ni–Ti powder mixture. Sample sections and particles of mixtures obtained were studied using an ultra high resolution field emission scanning electron microscope by scanning electron microscopy. XRD patterns of mixtures were recorded on the DRON 3 diffractometer with FeKα and CuKα radiation. It was found that after 10 minutes of HMT one intense superposition reflection remains on the XRD pattern with the angular position corresponding to Reflections 111 and 110 of phases with FCC and BCC lattices, respectively. A spark plasma sintering (SPS) method was used to obtain compact high-entropy material samples from the mixture after 90 minutes of HMT at 800 and 1000 °C. Their specific electrical resistance and density as well as the dependence of these properties on the sintering temperature were determined. It was demonstrated that the substitutional solid solution with the BCC lattice is probably enriched with titanium during the powder alloy SPS process.

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