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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-2019-3-4-12</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-459</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>Процессы получения и свойства порошков</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Production Processes and Properties of Powders</subject></subj-group></article-categories><title-group><article-title>Сфероидизация железного порошка в СВЧ- и гибридном плазмотронах</article-title><trans-title-group xml:lang="en"><trans-title>Spheroidization of iron powder in a microwave and hybrid plasma torches</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ерёмин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Eremin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер кафедры функциональных наносистем и высокотемпературных материалов (ФНСиВТМ) </p><p>119049, г. Москва, Ленинский пр-т, 4</p></bio><bio xml:lang="en"><p>Engineer, Department of functional nanosystems and high-temperature materials (FNSHTM)</p></bio><email xlink:type="simple">serega21_93@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аникин</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Anikin</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, доцент кафедры ФНСиВТМ</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Assistant professor, Department of FNSHTM</p><p>anikin47_47»@mail.ru</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецов</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, зав. кафедрой ФНСиВТМ</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Head of the Department of FNSHTM</p></bio><email xlink:type="simple">dk@misis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Леонтьев</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Leontiev</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, ген. директор </p><p>117216, г. Москва, Феодосийская ул., 1, стр. 30</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), General manager</p></bio><email xlink:type="simple">twinn_plasma@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>Ю. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>Yu. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер</p></bio><bio xml:lang="en"><p>Engineer</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дубинин</surname><given-names>В. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Dubinin</surname><given-names>V. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер</p></bio><bio xml:lang="en"><p>Engineer</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колесникова</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesnikova</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер-исследователь</p></bio><bio xml:lang="en"><p>Engineer</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ю.М. Яшнов</surname><given-names>Ю. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Yashnov</surname><given-names>Yu. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ-мат. наук, инженер</p></bio><bio xml:lang="en"><p>Cand. Sci. (Phys.-Math.), Engineer</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology (NUST) «MISIS»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ООО «ТВИНН»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>LLC «TWINN»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>26</day><month>09</month><year>2019</year></pub-date><volume>0</volume><issue>3</issue><fpage>4</fpage><lpage>12</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ерёмин С.А., Аникин В.Н., Кузнецов Д.В., Леонтьев И.А., Степанов Ю.Д., Дубинин В.З., Колесникова А.М., Ю.М. Яшнов Ю.М., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Ерёмин С.А., Аникин В.Н., Кузнецов Д.В., Леонтьев И.А., Степанов Ю.Д., Дубинин В.З., Колесникова А.М., Ю.М. Яшнов Ю.М.</copyright-holder><copyright-holder xml:lang="en">Eremin S.A., Anikin V.N., Kuznetsov D.V., Leontiev I.A., Stepanov Y.D., Dubinin V.Z., Kolesnikova A.M., Yashnov Y.M.</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://powder.misis.ru/jour/article/view/459">https://powder.misis.ru/jour/article/view/459</self-uri><abstract><p>Выполнены исследования процесса сфероидизации железного пористого порошка с размером частиц от 45 до 85 мкм в режиме СВЧ-разряда и при совместном воздействии СВЧ и дугового разрядов в плазме азота и гелия. Порошок был приготовлен методом распыления воздухом и затем отожжен в среде водорода. В результате распыления в плазме получены полые сфероидизирванные частицы с толщиной стенки от 1 до 10 мкм. Определена доля сфероидизированных частиц порошка в общем их количестве. Выявлено, что при повышении мощности СВЧ-излучения от 1,5 до 5 кВт происходит линейное увеличение степени сфероидизации частиц железного порошка. При использовании режима гибридного плазмотрона наблюдается совмещение условий работы СВЧ-излучения с дуговым разрядом, что позволяет повысить температуру плазмы. При соотношении мощностей СВЧ и дугового разрядов 1 : 1 получена практически 100 %-ная сфероидизация железного порошка. Металлографическое исследование сфероидизированных частиц показало, что их конечный размер отличается от исходного примерно в 10 раз. Установлено, что независимо от режима сфероидизации происходит окисление железного порошка, которое обусловлено недостаточной степенью очистки плазмообразующих газов. Структура поверхности частиц при использовании азота или гелия в качестве плазмообразующего газа различна. Эксперименты показали, что применение гелия является более предпочтительным, так как в этом случае частицы имеют лишь незначительную шероховатость в сравнении со структурой частиц при сфероидизации на азоте.</p></abstract><trans-abstract xml:lang="en"><p>The process of porous iron powder spheroidization in microwave discharge and combined microwave and DC discharge modes in nitrogen and helium plasma was studied with powder particle sizes ranging from 45 to 85 μm. The powder was obtained by air spraying and subsequent hydrogen annealing. Plasma spraying produced hollow spheroidized particles with a wall thickness from 1 to 10 μm. The share of spheroidized powder particles in their total volume was determined. It was found that microwave power rising from 1.5 to 5 kW leads to a linear increase in the spheroidization degree of iron powder particles. When working in the hybrid plasmatron mode, microwave radiation conditions are combined with a DC discharge and make it possible to increase the plasma temperature. When the ratio of microwave and DC discharge power is 1 : 1, virtually 100 % iron powder spheroidization is obtained. The metallographic study of spheroidized particles showed that their final size differs from the initial one by about 10 times. It was found that iron powder oxidation occurs regardless of the spheroidization mode. This is due to the insufficient purification degree of plasma gases. The structure of particle surfaces when using nitrogen or helium as a plasma gas is different. Experiments showed that the use of helium is more preferable, since the particles have only a slight roughness in comparison with the particle structure during nitrogen spheroidization.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>плазма</kwd><kwd>СВЧ</kwd><kwd>сфероидезация</kwd><kwd>аддитивные технологии</kwd><kwd>порошок</kwd><kwd>гибридный плазмотрон</kwd></kwd-group><kwd-group xml:lang="en"><kwd>plasma</kwd><kwd>microwave</kwd><kwd>spheroidization</kwd><kwd>additive technologies</kwd><kwd>powder</kwd><kwd>hybrid plasma torch</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rujuta A., KatkarB., Robert М. 3D volume rendering and 3D printing. Dental Clinics of North America. 2018. Vol. 62. P. 393—402.</mixed-citation><mixed-citation xml:lang="en">Rujuta A., KatkarB., Robert М. 3D volume rendering and 3D printing. Dental Clinics of North America. 2018. Vol. 62. 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