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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">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2021-1-52-58</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2040</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>МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIAL SCIENCE</subject></subj-group></article-categories><title-group><article-title>Исследование окалиностойкости жаропрочного никелевого сплава со структурой γ′-фазы</article-title><trans-title-group xml:lang="en"><trans-title>Stability to oxidation resistance of heat-resistant nickel alloy with γ′-phase structure</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>Беломытцев</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Belomyttsev</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Юрьевич Беломытцев, д.т.н., профессор кафедры металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Mikhail Yu. Belomyttsev, Dr. Sci. (Eng.), Prof. of the Chair "Metallography and Physics of Strength"</p><p>4, Leninskii ave., Moscow 119049</p></bio><email xlink:type="simple">myubelom@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></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 "MISIS" (MISIS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>16</day><month>02</month><year>2021</year></pub-date><volume>64</volume><issue>1</issue><fpage>52</fpage><lpage>58</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Беломытцев М.Ю., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Беломытцев М.Ю.</copyright-holder><copyright-holder xml:lang="en">Belomyttsev M.Y.</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://fermet.misis.ru/jour/article/view/2031">https://fermet.misis.ru/jour/article/view/2031</self-uri><abstract><p>Повышенный интерес к многокомпонентному легированию никеля связан с поиском новых составов жаропрочных и жаростойких сплавов на основе никелевого твердого раствора либо его интерметаллидов. В представленной работе изучено сопротивление высокотемпературному окислению сплава системы Ni – Al – Mo – W – Nb, который может быть использован как основа для создания дисперсно-упрочненных инертными частицами карбидов и нитридов двухфазных термически стабильных жаропрочных никелевых сплавов с матрицей из γ′-фазы. Образцы сплава подвергали окислению на воздухе при 900 – 1300 °С в течение 1 – 125 ч. Измеряли уменьшение массы (ΔМ, гр), которое после этого пересчитывали в показатели изменения массы образцов за единицу времени, нормированное на площадь поверхности исходных образцов (Δm, гр/м2 ·ч) и скорость «сгорания» поверхностного слоя (угара h, мкм/ч). Показано, что при окислении сплава Ni – Al – Mo – W – Nb при всех температурах происходит уменьшение массы образцов из-за образования непрочной и рыхлой поверхностной окалины. Зависимости этого показателя от времени окисления близки к линейной. С ростом температуры процессы уменьшения массы интенсифицируются. Предложено повышать окалиностойкость сплава Ni – Al – Mo – W – Nb кратковременным предварительным окислением при 1300 °С в течение 1 ч в атмосфере воздуха. Наблюдаемый эффект повышения стойкости к окислению связан с образованием в окалине слоя из соединения NiAl2O4, более эффективно предохраняющего сплав от взаимодействия с кислородом. Опыты по окислению с использованием инертных меток из платины показали, что механизмом, контролирующим окисление сплава Ni – Al – Mo – W – Nb при высоких температурах в случае наличия на поверхности слоя NiAl2O4 , следует считать диффузию кислорода через окисную пленку вглубь металла. Рассчитана энергия активации процессов окисления образцов сплава Ni – Al – Mo – W – Nb при температурах 900 – 1300 °С и без предварительного окисления. Это значение равно 234 943 ± 13 254 Дж/моль, что характерно для энергии активации процесса самодиффузии никеля.</p></abstract><trans-abstract xml:lang="en"><p>Heightened interest to multicomponent alloying of nickel is connected with the search of new compositions of oxidation- and heat-resistant alloys on the basis of nickel solid solution or its intermetallics. In the present work, the author has investigated the resistance to high-temperature oxidation of an alloy of Ni – Al – Mo – W – Nb system which can be used as a basis for creation of dispersion-strengthened inert particles of carbides and nitrides of two-phase thermally stable superalloys with a γ′-phase matrix. Samples of the alloy were subjected to oxidation on air at 900 – 1300 °C during 1 – 125 hours. Weight reduction (ΔМ, gr) was measured which after that was recalculated into indicators of change of samples weight for a time unit, rationing for the area of initial samples surface (Δm, gr/(m2 ·hour)) and “burn” rate of surface layer (scaling loss h, micron/hour). It is shown that at oxidation of Ni – Al – Mo – W – Nb alloy at all temperatures there is a reduction of samples weight because of formation of fragile and friable superficial scale. Dependences of this indicator on oxidation time are close to the linear. With growth of temperature, processes of weight reduction are intensified. It is offered to raise oxidation resistance of Ni – Al – Mo – W – Nb alloy by short-term preliminary oxidation at temperature of 1300 °С on air. The observable effect of increase of oxidation resistance is caused by formation in scale of NiAl 2O4 layer, more effectively protecting an alloy from interaction with oxygen. Experiences on oxidation with the use of inert platinum marks have shown that it is necessary to consider oxygen diffusion through oxide film into metal as a mechanism, supervising oxidation of Ni – Al – Mo – W – Nb alloy at high temperatures in case of presence of NiAl2O4 on the surface layer. Activation energy of oxidation of Ni – Al – Mo – W – Nb alloy was calculated at 900 – 1300 °С and without preliminary oxidation. This value is equal to 220,000 J/mol that is characteristic for activation energy of nickel self-diffusion.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>жаростойкость</kwd><kwd>жаропрочные никелевые сплавы</kwd><kwd>нимовал</kwd><kwd>гранульная металлургия</kwd><kwd>гамма-штрих фаза</kwd><kwd>скорость окисления</kwd><kwd>энергия активации окисления</kwd><kwd>анализ по Аррениусу</kwd><kwd>самодиффузия никеля</kwd></kwd-group><kwd-group xml:lang="en"><kwd>heat resistance</kwd><kwd>heat-resistant nickel alloys</kwd><kwd>nimoval</kwd><kwd>granule metallurgy</kwd><kwd>Ni3Al-intermetallic</kwd><kwd>oxidation rate</kwd><kwd>activation energy of oxidation</kwd><kwd>Arrhenius analysis</kwd><kwd>nickel self-diffusion</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">Jing Wu, Chong Li, Yongchang Liu, Yuting Wu, Qianying Guo, Huijun Li, Aipeng Wang. 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