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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">powder</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Порошковая металлургия и функциональные покрытия</journal-title><trans-title-group xml:lang="en"><trans-title>Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-308X</issn><issn pub-type="epub">2412-8767</issn><publisher><publisher-name>НИТУ "МИСИС"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/1997-308X-2024-6-44-55</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-938</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="ru"><subject>Самораспространяющийся высокотемпературный синтез</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Self-Propagating High-Temperature Synthesis (SHS)</subject></subj-group></article-categories><title-group><article-title>Самораспространяющийся высокотемпературный синтез высокодисперсной композиции Si3N4–TiC с использованием азида натрия и различных источников углерода</article-title><trans-title-group xml:lang="en"><trans-title>Self-propagating high-temperature synthesis of highly dispersed Si3N4–TiC composition using sodium azide and various carbon sources</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6292-280X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Титова</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Titova</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юлия Владимировна Титова – к.т.н., доцент кафедры «Металловедение, порошковая металлургия, наноматериалы» </p><p>Россия, 443100, г. Самара, ул. Молодогвардейская, 244</p></bio><bio xml:lang="en"><p>Yuliya V. Titova – Cand. Sci. (Eng.), Associate Professor at the Department of Metallurgy, Powder Metallurgy, Nanomaterials</p><p>244 Molodogvardeyskaya Str., Samara 443100, Russia</p></bio><email xlink:type="simple">titova600@mail.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/0000-0002-6081-8264</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Якубова</surname><given-names>А. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakubova</surname><given-names>A. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алсу Фаридовна Якубова – аспирант кафедры «Металловедение, порошковая металлургия, наноматериалы»</p><p>Россия, 443100, г. Самара, ул. Молодогвардейская, 244</p></bio><bio xml:lang="en"><p>Alsu F. Yakubova – Postgraduate Student, Department of Metallurgy, Powder Metallurgy, Nanomaterials</p><p>244 Molodogvardeyskaya Str., Samara 443100, Russia</p></bio><email xlink:type="simple">minekhanovaaf@mail.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/0000-0002-6430-9408</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белова</surname><given-names>Г. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Belova</surname><given-names>G. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Галина Сергеевна Белова – к.т.н., доцент кафедры «Металловедение, порошковая металлургия, наноматериалы»</p><p>Россия, 443100, г. Самара, ул. Молодогвардейская, 244</p></bio><bio xml:lang="en"><p>Galina S. Belova – Cand. Sci. (Eng.), Associate Professor at the Department of Metallurgy, Powder Metallurgy, Nanomaterials</p><p>244 Molodogvardeyskaya Str., Samara 443100, Russia</p></bio><email xlink:type="simple">galya.belova.94@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>18</day><month>12</month><year>2024</year></pub-date><volume>18</volume><issue>6</issue><fpage>44</fpage><lpage>55</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; НИТУ "МИСИС", 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">НИТУ "МИСИС"</copyright-holder><copyright-holder xml:lang="en">НИТУ "МИСИС"</copyright-holder><license xlink:href="https://powder.misis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://powder.misis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://powder.misis.ru/jour/article/view/938">https://powder.misis.ru/jour/article/view/938</self-uri><abstract><p>Исследованы основные свойства композиции Si3N4–TiC, которые показывают перспективы использования нитридно-карбидных композиционных материалов в различных отраслях промышленности. Применен in-situ процесс получения композиционной керамики путем проведения химического синтеза нитридных и карбидных наночастиц в объеме композита, так как известно, что полученные заранее очень мелкие частицы различных фаз не могут быть равномерно распределены в объеме композита путем механического смешивания порошков (ex-situ процесс). Представлены результаты развития технологии получения композиции Si3N4–TiC методом азидного СВС при сжигании смесей порошков Ti, C, NaN3 с активирующей и карбидизирующей добавкой политетрафторэтилена (C2F4)n (ПТФЭ). Результаты термодинамических расчетов этих реакций показали, что адиабатические температуры достаточно высоки для реализации самоподдерживающегося режима горения. Представлены экспериментальные исследования микроструктуры и фазового состава продуктов горения. Синтезированные композиции состоят из высокодисперсных частиц равноосной формы, представляющих собой смесь наноразмерных (менее 100 нм) и субмикронных (от 100 до 500 нм) частиц карбида и нитрида титана, а также волокон нитрида кремния диаметром от 50–200 нм и длиной до 5 мкм. Применение ПТФЭ с частичной заменой углерода в составе смесей в азидном СВС позволило устранить в большинстве случаев недостатки традиционного подхода для различных соотношений целевых фаз Si3N4 и TiC и синтезировать высокодисперсные порошковые композиции Si3N4–TiC с фазовым составом, значительно более близким к рассчитанному теоретическому составу. Таким образом, рассмотренное применение метода азидного СВС позволило получить высокодисперсные композиции керамических порошков Si3N4–TiC и Si3N4–TiN–TiC.</p></abstract><trans-abstract xml:lang="en"><p>The main properties of the highly dispersed Si3N4–TiC composition are presented, demonstrating the potential for using nitride-carbide composite materials across various industries. An in-situ process was employed to synthesize composite ceramics by chemically producing nitride and carbide nanoparticles directly within the composite volume. The study details the development of the technology for synthesizing the highly dispersed Si3N4–TiC composition using the azide SHS method during the combustion of mixtures of Ti, C, and sodium azide (NaN3) powders with polytetrafluoroethylene (PTFE, (C2F4)n ) serving as an activating and carbiding additive. Thermodynamic calculations of these reactions showed that the adiabatic temperatures were sufficiently high to sustain a self-propagating combustion mode. Experimental investigations into the microstructure and phase composition of the combustion products are also presented. The synthesized compositions consist of highly dispersed equiaxed particles, which include a mixture of nanosized (less than 100 nm) and submicron (100–500 nm) particles of titanium carbide and nitride, as well as silicon nitride fibers with diame­ters of 50–200 nm and lengths of up to 5 μm. The use of PTFE as a partial replacement for carbon in the mixture during azide SHS eliminated, in most cases, the limitations of traditional approaches for achieving various ratios of target phases of Si3N4 and TiC. This enabled the synthesis of highly dispersed Si3N4–TiC powder compositions with a phase composition closely aligned with theoretical calculations. Thus, the application of the azide SHS method proved effective for obtaining highly dispersed ceramic powder compositions, including Si3N4–TiC and Si3N4–TiN–TiC.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нитрид кремния</kwd><kwd>карбид титана</kwd><kwd>композиционная керамика</kwd><kwd>самораспространяющийся высокотемпературный синтез</kwd><kwd>азид натрия</kwd><kwd>политетрафторэтилен</kwd><kwd>галоидные соли</kwd><kwd>горение</kwd><kwd>состав</kwd></kwd-group><kwd-group xml:lang="en"><kwd>silicon nitride</kwd><kwd>titanium carbide</kwd><kwd>composite ceramics</kwd><kwd>self-propagating high-temperature synthesis</kwd><kwd>sodium azide</kwd><kwd>poly­tetrafluoroethylene</kwd><kwd>halide salts</kwd><kwd>combustion</kwd><kwd>composition</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда в рамках проекта № 23-29-00680.</funding-statement><funding-statement xml:lang="en">This work was carried out with financial support from the Russian Science Foundation under Project No. 23-29-00680.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Schioler L.J. 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