nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2026-2-67-73nuc-1002Research ArticleСтатьиИССЛЕДОВАНИЕ СТРУКТУРНО-ФАЗОВОГО СОСТОЯНИЯ МЕХАНОАКТИВИРОВАННОЙ СИСТЕМЫ Pd-Ti-MgSTUDY OF THE STRUCTURAL-PHASE STATE OF THE MECHANICALLY ACTIVATED SYSTEM Pd-Ti-Mghttps://orcid.org/0000-0001-5510-0568КурбанбековШ. Р.KurbanbekovSh. R.

PhD, профессор 

Туркестан

Sherzod Rustambekovich Kurbanbekov

Turkestan

sherzod.kurbanbekov@ayu.edu.kzhttps://orcid.org/0000-0001-6836-1214СкаковМ. К.SkakovM. K.

Доктор физико-математических наук, профессор 

Усть-Каменогорск

Mazhin Kanapinovich Skakov 

Ust-Kamenogorsk

skakovnnc@gmail.comТокежановА. Б.TokezhanovA. B.

Докторант 

Усть-Каменогорск

Azamat Berikuly Tokezhanov 

Ust-Kamenogorsk

tokezhanov1995@mail.ruhttps://orcid.org/0009-0003-5440-8722АмангельдиеваЮ. О.AmangeldievaYu. O.

Младший научный сотрудник 

Туркестан

Yulduz Oybekkyzy Amangeldieva 

Turkestan

yulduz.amangeldiyeva@ayu.edu.kzМеждународный казахско-турецкий университет имени Ходжи Ахмета ЯсавиКазахстанKhoja Ahmed Yasawi International Kazakh-Turkish UniversityKazakhstanВосточно-Казахстанский университет имени Сарсена АманжоловаКазахстанSarsen Amanzholov East Kazakhstan UniversityKazakhstanМеждународный казахско-турецкий университет им. Ходжи Ахмета ЯсавиКазахстанKhoja Ahmed Yasawi International Kazakh-Turkish UniversityKazakhstan202609082026026773Copyright © Курбанбеков Ш.Р., Скаков М.К., Токежанов А.Б., Амангельдиева Ю.О., 20262026Курбанбеков Ш.Р., Скаков М.К., Токежанов А.Б., Амангельдиева Ю.О.Kurbanbekov S.R., Skakov M.K., Tokezhanov A.B., Amangeldieva Y.O.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://journals.nnc.kz/jour/article/view/1002

В данной работе исследуются структурно-фазовое состояние и микроструктурная организация механически активированных тройных порошков Pd-Ti-Mg как перспективных материалов для твердотельного хранения водорода. Элементарные порошки обрабатывали методом высокоэнергетического планетарного измельчения (Pulverisette 7, 500 об/мин; BPR = 10:1) в атмосфере Ar. Рентгенофазовый анализ (Cu Kα) выявил наличие fcc-Pd (Fm-3m, a = 3.887 Å), α-Ti (hcp, P63/mmc, a = 2.950 Å, c = 4.681 Å), метастабильной доли fcc-Ti (Fm-3m, a = 4.060 Å), а также незначительного количества hcp-Mg (P63/mmc, a = 3.209 Å, c = 5.211 Å); при этом на объёмном уровне отчётливые пики интерметаллидов не разрешаются. Лазерная дифракция показала мультимодальное распределение частиц по размерам с параметрами D10≈5 мкм, D50≈20 мкм, D90≈50 мкм (span≈2.25), наличием тонкой суб-5 мкм моды и грубого хвоста в области 300-600 мкм, который отнесён к Mg. Картирование SEM-EDS свидетельствует о мозаичной микроструктуре: изометричные Pd-обогащённые области (~10-60 мкм), пластинчатые Ti-обогащённые фрагменты (~20-80 мкм), локальная колокализация Pd и Ti на межфазных границах (интерпретируемая как предреакционное состояние для образования интерметаллидов Pd-Ti), а также преимущественно межзеренно распределённый дисперсный Mg. Совокупность полученных данных указывает на формирование в результате механической активации большого числа высокоэнергетических межфазных границ и укороченных путей диффузии, что позволяет направленно оптимизировать структурное состояние материала для последующих исследований, связанных с водородом, избегая при этом преждевременного образования объёмных интерметаллидных фаз. Полученные результаты предлагают микроструктурно-ориентированный подход к регулированию ёмкости, кинетики и циклической стабильности за счёт контролируемых параметров измельчения и целенаправленно подобранных температурных режимов, способствующих благоприятным межфазным реакциям Pd↔Ti при одновременном ограничении сегрегации и окисления Mg.

This work examines the structural–phase state and microstructural organization of mechanically activated ternary Pd-Ti-Mg powders as candidate materials for solid-state hydrogen storage. Elemental powders were processed by high-energy planetary milling (Pulverisette 7, 500 rpm; BPR=10:1) in Ar. X-ray diffraction (Cu Kα) reveals fcc-Pd (Fm-3m, a=3.887 Å), α-Ti (hcp, P6₃/mmc, a=2.950 Å, c=4.681 Å), a metastable fcc-Ti fraction (Fm-3m, a=4.060 Å), and minor hcp-Mg (P63/mmc, a=3.209 Å, c=5.211 Å); no distinct intermetallic peaks are resolved at the bulk level. Laser diffraction shows a multimodal size distribution with D10≈5 µm, D50≈20 µm, D90≈50 µm (span≈2.25), a fine sub-5 µm mode, and a coarse 300-600 µm tail attributed to Mg. SEM-EDS mapping evidences a mosaic microstructure: isometric Pd-rich domains (~10-60 µm), platy Ti-rich fragments (~20–80 µm), local Pd-Ti colocalization at interfaces (interpreted as a prereaction state for Pd-Ti intermetallics), and predominantly intergranular, dispersed Mg. The combined data indicate abundant high-energy interfaces and shortened diffusion paths created by mechanical activation, which allows guidingfurther optimization of the structural state of the material for subsequent hydrogen-related investigation. while avoiding premature formation of bulk intermetallics. The results provide a microstructure-guided route to tune capacity, kinetics, and cycling stability via controlled milling parameters and targeted thermal schedules that promote beneficial Pd↔Ti interfacial reactions while limiting Mg segregation and oxidation.

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