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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2025-16-4-460-466</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-1445</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group></article-categories><title-group><article-title>Effect of Si and Ti5Si3 on the adhesion at the α-Al2O3/γ-TiAl interface and oxygen diffusion in the alloy</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние Si и Ti5Si3  на адгезию на интерфейсе α- Al2O3/γ-TiAl и диффузию кислорода в сплав</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5099-3942</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бакулин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bakulin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Alexander V. Bakulin </p><p>Tomsk </p></bio><email xlink:type="simple">bakulin@ispms.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0925-6603</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чумакова</surname><given-names>Л. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Chumakova</surname><given-names>L. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Lora S. Chumakova</p><p>Tomsk </p></bio><email xlink:type="simple">chumakova@ispms.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7155-3492</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кулькова</surname><given-names>С. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulkova</surname><given-names>S. E.</given-names></name></name-alternatives><bio xml:lang="en"><p>Svetlana E. Kulkova</p><p>Tomsk </p></bio><email xlink:type="simple">kulkova@ispms.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>03</day><month>09</month><year>2025</year></pub-date><volume>16</volume><issue>4</issue><fpage>460</fpage><lpage>466</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bakulin A.V., Chumakova L.S., Kulkova S.E., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Бакулин А.В., Чумакова Л.С., Кулькова С.Е.</copyright-holder><copyright-holder xml:lang="en">Bakulin A.V., Chumakova L.S., Kulkova S.E.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://nanojournal.ifmo.ru/jour/article/view/1445">https://nanojournal.ifmo.ru/jour/article/view/1445</self-uri><abstract><p>The effect of silicon and Ti5Si3 films on the adhesion properties of the α-Al2O3/γ-TiAl interface and oxygen diffusion in TiAl was studied using the projector augmented-wave method within density functional theory. It was shown that the formation of intermediate silicide layers at the oxide–alloy interface can lead to a significant decrease in the oxygen diffusion coefficient. At the same time, adhesion at the oxide–silicide interface remains high, while for the silicide–alloy interface, the values of ∼2.26–2.80 J/m2 typical for interfaces with metallic and metal-covalent bonds were obtained.</p></abstract><trans-abstract xml:lang="ru"><p>Методом проекционных присоединенных волн в рамках теории функционала электронной плотности изучено влияние кремния и пленок Ti5Si3 на адгезионные свойства границы раздела α-Al2O3/γ-TiAl и диффузию кислорода в TiAl. Показано, что формирование на границе раздела оксид–сплав промежуточных силицидных слоев может приводить к значительному понижению коэффициента диффузии кислорода. При этом адгезия на интерфейсе оксид–силицид остается высокой, тогда как для интерфейса силицид–сплав получены значения ∼2.26–2.80 Дж/м2 типичные для границ раздела с металлической и металло-ковалентной связью.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>алюминиды титана</kwd><kwd>силицид титана</kwd><kwd>диффузия кислорода</kwd><kwd>адгезия</kwd><kwd>ab-initio расчеты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>titanium aluminides</kwd><kwd>titanium silicide</kwd><kwd>oxygen diffusion</kwd><kwd>adhesion</kwd><kwd>the ab-initio calculations</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was performed according to the Government research assignment for ISPMS SB RAS, project FWRW-2022-0001. 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