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-2026-1-15-24powder-1097Research ArticleТугоплавкие, керамические и композиционные материалыRefractory, Ceramic, and Composite MaterialsЭкспериментальное исследование фазового состава и способности к поглощению водорода порошковых сплавов системы Ti–Fe с повышенным содержанием титанаExperimental study of phase composition and hydrogen absorption capacity of Ti–Fe powder alloys with increased titanium contenthttps://orcid.org/0000-0001-7677-0288КрохалевА. В.KrokhalevA. V.

Александр Васильевич Крохалев – д.т.н., декан факультета технологии конструкционных материалов

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Aleksander V. Krokhalev – Dr. Sci. (Eng.), Dean of the Faculty of Structural Materials Technology

28 Lenina Prosp., Volgograd 400005, Russia

kroch58@yandex.ruhttps://orcid.org/0000-0003-2388-020XЧерниковД. Р.ChernikovD. R.

Дмитрий Романович Черников – учебный мастер кафед­ры «Оборудование и технология сварочного производства»

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Dmitry R. Chernikov – Training Master, Department of Welding Equipment and Technology

28 Lenina Prosp., Volgograd 400005, Russia

chernikovdr@yandex.ruhttps://orcid.org/0000-0002-5039-4592ХарламовВ. О.KharlamovV. O.

Валентин Олегович Харламов – к.т.н., доцент кафедры «Оборудование и технология сварочного производства», вед. инженер Центра коллективного пользования «Физико-химические методы исследования»

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Valentin O. Kharlamov – Cand. Sci. (Eng.), Associate Professor, Department of Welding Equipment and Technology; Lead Engineer, Shared Research Center “Physicochemical Research Methods”

28 Lenina Prosp., Volgograd 400005, Russia

harlamov_vo@mail.ruhttps://orcid.org/0000-0001-6316-8896ТужиковО. О.TuzhikovO. O.

Олег Олегович Тужиков – д.т.н., зав. кафедрой «Общая и неорганическая химия»

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Oleg O. Tuzhikov – Dr. Sci (Eng.), Head of the Department of Gene­ral and Inorganic Chemistry

28 Lenina Prosp., Volgograd 400005, Russia

tuzhikovoleg@mail.ruhttps://orcid.org/0000-0003-2802-8497КузьминС. В.KuzminS. V.

Сергей Викторович Кузьмин – д.т.н., чл.-корр. РАН, профессор кафедры «Оборудование и технология сварочного производства», первый проректор

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Sergey V. Kuzmin – Dr. Sci. (Eng.), Corresponding Member of the Russian Academy of Science, Professor, Department of Welding Equipment and Technology; First Vice-Rector

28 Lenina Prosp., Volgograd 400005, Russia

weld@vstu.ruhttps://orcid.org/0000-0003-3066-058XЛысакВ. И.LysakV. I.

Владимир Ильич Лысак – д.т.н., академик РАН, проф., зав. кафедрой «Оборудование и технология сварочного производства», науч. руководитель

Россия, 400005, г. Волгоград, пр-т им. Ленина, 28

Vladimir I. Lysak – Dr. Sci. (Eng.), Academician of the Russian Aca­demy of Sciences, Professor; Head of the Department of Welding Equipment and Technology; Scientific Adviser

28 Lenina Prosp., Volgograd 400005, Russia

lysak@vstu.ruВолгоградский государственный технический университетРоссияVolgograd State Technical UniversityRussian Federation20260304202620115–24Copyright © НИТУ "МИСИС", 20262026НИТУ "МИСИС"НИТУ "МИСИС"https://powder.misis.ru/jour/about/submissions#copyrightNoticehttps://powder.misis.ru/jour/article/view/1097

Рассмотрены основные закономерности формирования структуры и фазового состава материалов системы Fe–Ti, перспективных для хранения водорода, при уплотнении взрывом порошковых смесей титана с железом и спекании полученных прессовок в межкритическом интервале температур. Установлено, что взрывное прессование смесей порошков Ti + Fe обеспечивает возможность получения материалов, состоящих из зерен титана и железа с практически нулевой порис­тостью и развитой поверхностью контакта между частицами, что создает благоприятные условия для межфазного взаимодействия между ними при последующем нагреве. Нагрев таких материалов до 1100 °C с выдержкой при этой температуре в течение 1 ч приводит к появлению жидкой фазы, выделению в ней интерметаллических фаз TiFe и Ti2Fe и образованию после охлаждения структуры TiFe + Ti2Fe (при содержании Ti от 57 до 59 ат. %) или TiFe + Ti2Fe + β-Ti (59–68 ат. % Ti). Рассмотрены водородосорбционные свойства полученных материалов при электрохимическом гидрировании. Показано, что появление в структуре наряду с интерметаллидом TiFe сопутствующих фаз (β-твердого раствора железа в титане и метастабильного интерметаллида Ti2Fe) приводит к устранению необходимости активации материалов и сопровождается сущест­венным увеличением водородной емкости при первичном гидрировании. Установлено, что способность к обратимому гидрированию материалы системы Ti–Fe с повышенным содержанием титана сохраняют до его значения 67 ат. % Ti. Выявлено, что наиболее высокая величина обратимой водородной емкости достигается при 64 ат. % Ti и соответствует 2,16 мас. % H, что существенно больше емкости традиционных материалов системы Ti–Fe, используемых в настоящее время. Соотношение содержаний фаз TiFe и Ti2Fe в структуре материала при этом оказывается близким к 1:1.

The main patterns of structure formation and phase composition of Fe–Ti materials promising for hydrogen storage were investigated during explosive compaction of titanium–iron powder mixtures followed by sintering of the resulting compacts at elevated temperatures. It was established that explosive compaction of Ti + Fe powder mixtures makes it possible to obtain materials consisting of titanium and iron grains with virtually zero porosity and a developed contact surface between particles, which creates favorable conditions for interphase interaction between them during subsequent heating. Heating such materials to 1100 °C with a 1-h hold results in the formation of a liquid phase and the precipitation of TiFe and Ti2Fe intermetallic phases in the melt. After cooling, this leads to the formation of either a TiFe + Ti2Fe structure (with Ti content of 57– 59 at. %) or a TiFe + Ti2Fe + β-Ti (59–68 at. % Ti) The hydrogen sorption properties of the obtained materials during electrochemical hydrogenation were studied. It was shown that the presence of accompanying phases (the β-solid solution of iron in titanium and metastable Ti2Fe intermetallic) in the structure, together with the TiFe intermetallic compound, eliminates the need for preliminary activation and leads to a significant increase in hydrogen capacity during primary hydrogenation. Materials of the Ti–Fe system with increased titanium content were found to retain their ability for reversible hydrogenation up to a titanium content of 67 at. %. The highest reversible hydrogen capacity was achieved at 64 at. % Ti and reached 2.16 wt. % H, which significantly exceeds the capacity of conventional Ti–Fe materials currently in use. The ratio of TiFe and Ti2Fe phases in the material structure is close to 1:1.

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