nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2023-2-89-96nuc-535Research ArticleСтатьиИССЛЕДОВАНИЕ МЕТОДАМИ ЭЛЕКТРОННОЙ МИКРОСКОПИИ СТРУКТУРНО-ФАЗОВОГО СОСТОЯНИЯ ПОПЕРЕЧНОГО СЕЧЕНИЯ ПОВЕРХНОСТНОГО СЛОЯ ВОЛЬФРАМА ПОСЛЕ КАРБИДИЗАЦИИ В ПУЧКОВО-ПЛАЗМЕННОМ РАЗРЯДЕRESEARCH OF THE STRUCTURAL-PHASE STATE OF TUNGSTEN SURFACE LAYER CROSS-SECTION AFTER CARBIDIZATION IN A BEAM-PLASMA DISCHARGE USAGE ELECTRON MICROSCOPY METHODShttps://orcid.org/0000-0001-6836-1214СкаковМ. К.SkakovM. K.

Курчатов, Усть-Каменогорск

Mazhyn Skakov

Kurchatov, Ust-Kamenogorsk

skakov@nnc.kzhttps://orcid.org/0000-0001-7627-8752БаклановВ. В.BaklanovV. V.

Курчатов

Viktor Baklanov

Kurchatov

baklanov@nnc.kzhttps://orcid.org/0000-0002-4423-4349ЖанболатоваГ. К.ZhanbolatovaG. K.

Курчатов, Усть-Каменогорск

Gainiya Zhanbolatova

Kurchatov, Ust-Kamenogorsk

kaiyrdy@nnc.kzhttps://orcid.org/0000-0002-2188-8075МиниязовА. Ж.MiniyazovA. Zh.

 Курчатов

Arman Miniyazov

Kurchatov

miniyazov@nnc.kzКожахметовЕ. А.KozhakhmetovYe. A.

Курчатов

Yernat Kozhakhmetov

Kurchatov

kozhahmetov_e@nnc.kzhttps://orcid.org/0000-0002-2803-5972ГрадобоевА. В.GradoboevA. V.

Томск

Alexandr Gradoboev

Tomsk

gradoboev@mail.ruНациональный ядерный центр Республики Казахстан; Восточно-Казахстанский Университет им. С. АманжоловаКазахстанNational Nuclear Center of the Republic of Kazakhstan; S. Amanzholov East Kazakhstan UniversityKazakhstanФилиал «Институт атомной энергии» РГП НЯЦ РККазахстанBranch "Institute of Atomic Energy" RSE NNC RKKazakhstanФилиал «Институт атомной энергии» РГП НЯЦ РК; Восточно-Казахстанский Университет им. С. АманжоловаКазахстанBranch “Institute of Atomic Energy” RSE NNC RK; S. Amanzholov East Kazakhstan UniversityKazakhstanТомский политехнический университетРоссияTomsk Polytechnic UniversityRussian Federation202306072023028996Copyright © Скаков М.К., Бакланов В.В., Жанболатова Г.К., Миниязов А.Ж., Кожахметов Е.А., Градобоев А.В., 20232023Скаков М.К., Бакланов В.В., Жанболатова Г.К., Миниязов А.Ж., Кожахметов Е.А., Градобоев А.В.Skakov M.K., Baklanov V.V., Zhanbolatova G.K., Miniyazov A.Z., Kozhakhmetov Y.A., Gradoboev A.V.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/535

В настоящей работе представлены результаты исследований структурно-фазового состояния поперечного сечения поверхностного слоя вольфрама после карбидизации в пучково-плазменном разряде. Карбидизация поверхности вольфрама в пучково-плазменном разряде была осуществлена на плазменно-пучковой установке. Исследования структуры поперечного сечения поверхностного слоя образцов вольфрама после карбидизации при температуре 1000 °С, 1200 °С, 1400 °С были проведены методами просвечивающей и сканирующей электронной микроскопии. По результатам исследований на СЭМ были получены многослойная карта ЭДС и локальный элементный анализ, на основе которых сделана оценка глубины проникновения атомов углерода в вольфрам. Установлено, что глубины проникновения составляет ~20 µм. Исследование тонкой структуры поверхностного слоя выполнялось при использовании ПЭМ. Для ПЭМ-анализа поперечного сечения вольфрамовых образцов с карбидизированным слоем были подготовлены шлифы методом ионного утонения на установке Ion Slicer ЕМ-09100 IS. По результатам исследований выявлено, что после карбидизации вольфрам в поверхностном слое присутствует главным образом, в составе карбидов WC, W2C. На светлопольных ПЭМ-изображениях поперечного сечения поверхностного слоя образцов вольфрама после карбидизации при температуре 1200 °С, 1400 °С выявлены изгибные контуры экстинкции, которые свидетельствует об упруго-напряженном состоянии поверхностного слоя образца, что и приводит к изгибу-кручению фольги.

This paper presents research results on the structural-phase state of a tungsten surface layer cross-section after carbidization in a beam-plasma discharge. Tungsten surface carbidization in a beam-plasma discharge was conducted in a plasma-beam installation (PBI). Research on the cross-section structure of the surface layer of tungsten samples after carbidization at temperatures of 1000 °C, 1200 °C, and 1400 °C was conducted using transmission and scanning electron microscopy. Based on the results of SEM studies, a multilayer EMF map and local elemental analysis were obtained, based on which the depth of penetration of carbon atoms into tungsten was evaluated. It is established that the penetration depth is ~20 µm. The surface layer fine structure was researched using TEM. For TEM analysis of the tungsten sample cross-section with a carbidized layer, sections were prepared by ion thinning using an Ion Slicer EM-09100 IS unit. According to the research results, it was revealed that after carbidization, tungsten is available in the surface layer mainly in the composition of carbides WC and W2C. On bright-field TEM images of the cross-section of the surface layer of tungsten samples after carbidization at a temperature of 1200 °C and 1400 °C, bending extinction contours are revealed, which indicate the elastically stressed state of the sample surface layer, which leads to bending-torsion of the foil.

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