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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1025</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2025-1-71-4</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The influence of silicon content on the structure of Cu55Ni6Mn4Zn brazing alloy and on the structure and properties of brazed joints</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние количественного содержания кремния на структуру припоя Cu55Ni6Mn4Zn и на структуру и свойства паяных соединений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2511-2845</contrib-id><name-alternatives><name xml:lang="en"><surname>Pashkov</surname><given-names>Igor N.</given-names></name><name xml:lang="ru"><surname>Пашков</surname><given-names>Игорь Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Engineering), professor of Chair No. 1101</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры 1101</p></bio><email>pashkov_prof@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1922-6635</contrib-id><name-alternatives><name xml:lang="en"><surname>Gadzhiev</surname><given-names>Magomed R.</given-names></name><name xml:lang="ru"><surname>Гаджиев</surname><given-names>Магомед Ражабович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>postgraduate student</p></bio><bio xml:lang="ru"><p>аспирант</p></bio><email>maga.2630@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6062-397X</contrib-id><name-alternatives><name xml:lang="en"><surname>Tavolzhanskiy</surname><given-names>Stanislav A.</given-names></name><name xml:lang="ru"><surname>Таволжанский</surname><given-names>Станислав Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair “Foundry Technologies and Material Art Working”</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Литейные технологии и художественная обработка материалов»</p></bio><email>stavolj@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9517-5871</contrib-id><name-alternatives><name xml:lang="en"><surname>Bazlova</surname><given-names>Tatiana A.</given-names></name><name xml:lang="ru"><surname>Базлова</surname><given-names>Татьяна Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair “Foundry Technologies and Material Art Working”</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Литейные технологии и художественная обработка материалов»</p></bio><email>tbazlova@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3214-1935</contrib-id><name-alternatives><name xml:lang="en"><surname>Bazhenov</surname><given-names>Vyacheslav E.</given-names></name><name xml:lang="ru"><surname>Баженов</surname><given-names>Вячеслав Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair “Foundry Technologies and Material Art Working”</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Литейные технологии и художественная обработка материалов»</p></bio><email>v.e.bagenov@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Katanaeva</surname><given-names>Diana A.</given-names></name><name xml:lang="ru"><surname>Катанаева</surname><given-names>Диана Андреевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>graduate student</p></bio><bio xml:lang="ru"><p>магистрант</p></bio><email>dianakat2001@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow Aviation Institute</institution></aff><aff><institution xml:lang="ru">Московский авиационный институт</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">University of Science and Technology MISIS</institution></aff><aff><institution xml:lang="ru">Университет науки и технологий МИСИС</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-03-31" publication-format="electronic"><day>31</day><month>03</month><year>2025</year></pub-date><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>47</fpage><lpage>57</lpage><history><date date-type="received" iso-8601-date="2025-03-31"><day>31</day><month>03</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-03-31"><day>31</day><month>03</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Pashkov I.N., Gadzhiev M.R., Tavolzhanskiy S.A., Bazlova T.A., Bazhenov V.E., Katanaeva D.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Пашков И.Н., Гаджиев М.Р., Таволжанский С.А., Базлова Т.А., Баженов В.Е., Катанаева Д.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Pashkov I.N., Gadzhiev M.R., Tavolzhanskiy S.A., Bazlova T.A., Bazhenov V.E., Katanaeva D.A.</copyright-holder><copyright-holder xml:lang="ru">Пашков И.Н., Гаджиев М.Р., Таволжанский С.А., Базлова Т.А., Баженов В.Е., Катанаева Д.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/1025">https://vektornaukitech.ru/jour/article/view/1025</self-uri><abstract xml:lang="en"><p>Cu55Ni6Mn4Zn (MNMts55-6-4) copper-zinc alloy is widely used for brazing hard-alloy tools and steels. However, the presence of silicon in the alloy (0.1–0.4 wt. %) can lead to the formation of brittle silicides of iron, nickel, and manganese, which negatively influences the strength of brazed joints. The purpose of the study was to determine the influence of the quantitative content of silicon in copper-zinc brazing alloy doped jointly with nickel and manganese on the structure of brazing alloy blanks before brazing and the structure and properties of brazed joints. In the work, to study the distribution of silicides in ingots, tapes, and brazed seams, the authors used microstructural analysis methods, including electron microscopy and X-ray spectral microanalysis. The results showed that with a silicon content of up to 0.2 wt. %, silicides form finely dispersed inclusions uniformly distributed throughout the seam. However, with an increase in the silicon content to 0.4 wt. %, the formation of continuous layers of iron silicides along the brazing alloy – steel boundary is observed, which leads to brittle failure of the joints under mechanical loads. The influence of small gaps turned out to be especially critical during brazing, where the formation of large crystals of iron silicides significantly reduces the strength of the joints. The scientific novelty of the work lies in identifying the optimal silicon content in the alloy (no more than 0.2 wt. %) to minimize the negative effect of silicides on the properties of brazed joints. The results obtained can be used to develop process recommendations for the production of brazing alloys and brazing of steels, which will allow improving the reliability and durability of brazed joints under production-line conditions.</p></abstract><trans-abstract xml:lang="ru"><p>Медно-цинковый сплав Cu55Ni6Mn4Zn (МНМц55-6-4) широко применяется для пайки твердосплавного инструмента и сталей. Однако наличие кремния в составе сплава (0,1–0,4 % мас.) может приводить к образованию хрупких силицидов железа, никеля и марганца, что негативно влияет на прочность паяных соединений. Цель исследования – определение влияния количественного содержания кремния в медно‑цинковом припое, легированном совместно никелем и марганцем, на структуру заготовок припоя перед пайкой и структуру и свойства паяных соединений. В работе использовались методы микроструктурного анализа, включая электронную микроскопию и микрорентгеноспектральный анализ, для изучения распределения силицидов в слитках, лентах и паяных швах. Результаты показали, что при содержании кремния до 0,2 % мас. силициды образуют мелкодисперсные включения, равномерно распределенные в объеме шва. Однако при увеличении содержания кремния до 0,4 % мас. наблюдается формирование сплошных слоев силицидов железа вдоль границы «припой – сталь», что приводит к хрупкому разрушению соединений при механических нагрузках. Особенно критичным оказалось влияние малых зазоров при пайке, где образование крупных кристаллов силицидов железа значительно снижает прочность соединений. Научная новизна работы заключается в установлении оптимального содержания кремния в сплаве (не более 0,2 % мас.) для минимизации негативного влияния силицидов на свойства паяных соединений. Полученные результаты могут быть использованы для разработки технологических рекомендаций при производстве припоев и пайке сталей, что позволит повысить надежность и долговечность паяных соединений в промышленных условиях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>brazing of hard-alloy tools</kwd><kwd>Cu55Ni6Mn4Zn (MNMts55-6-4)</kwd><kwd>influence of silicon on brazed joints</kwd><kwd>iron silicides in brazed seams</kwd><kwd>brazed seam microstructure</kwd><kwd>embrittlement of brazed joints</kwd><kwd>optimization of brazing alloy composition</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>пайка твердосплавного инструмента</kwd><kwd>Cu55Ni6Mn4Zn (МНМц55-6-4)</kwd><kwd>влияние кремния на паяные соединения</kwd><kwd>силициды железа в паяных швах</kwd><kwd>микроструктура паяного шва</kwd><kwd>хрупкость паяных соединений</kwd><kwd>оптимизация состава припоя</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Amelzadeh M., Mirsalehi S.E. 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