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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ МИСИС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2020-2-47-54</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-1104</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>Металловедение и термическая обработка</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Physical Metallurgy and Heat Treatment</subject></subj-group></article-categories><title-group><article-title>Состав и кристаллическая структура тройных фаз в системе Ta-Ni-Al</article-title><trans-title-group xml:lang="en"><trans-title>Composition and crystal structure of ternary phases in the Ta-Ni-Al system</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>Щукин</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shchukin</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, старший научный сотрудник лаборатории физического материаловедения ИСМАН.</p><p>142432, Московская обл., Ногинский р-н, Черноголовка, ул. Акад. Осипьяна, 8.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Senior researcher, Laboratory of materials science, Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences (ISMAN)</p><p>142432, Moscow reg., Chernogolovka, Acad. Osip'yan str., 8.</p></bio><email xlink:type="simple">shchukin@ism.ac.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>Коновалихин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalikhin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат химических наук, старший научный сотрудник лаборатории рентгеноструктурных исследований ИСМАН.</p><p>142432, Московская обл., Ногинский р-н, Черноголовка, ул. Акад. Осипьяна, 8.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Chem.), Senior researcher, Laboratory of X-ray diffraction studies, ISMAN.</p><p>142432, Moscow reg., Chernogolovka, Acad. Osip'yan str., 8.</p></bio><email xlink:type="simple">ksv17@ism.ac.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>Ковалёв</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, заведующий лабораторией рентгеноструктурных исследований ИСМАН.</p><p>142432, Московская обл., Ногинский р-н, Черноголовка, ул. Акад. Осипьяна, 8.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Head of Laboratory of X-ray diffraction studies, ISMAN.</p><p>142432, Moscow reg., Chernogolovka, Acad. Osip'yan str., 8.</p></bio><email xlink:type="simple">kovalev@ism.ac.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>Сычёв</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Sytschev</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, заведующий лабораторией физического материаловедения ИСМАН.</p><p>142432, Московская обл., Ногинский р-н, Черноголовка, ул. Акад. Осипьяна, 8.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Leading researcher, Head of Laboratory of materials science, ISMAN.</p><p>142432, Moscow reg., Chernogolovka, Acad. Osip'yan str., 8.</p></bio><email xlink:type="simple">sytschev@ism.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова РАН (ИСМАН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences (ISMAN)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>22</day><month>04</month><year>2020</year></pub-date><volume>0</volume><issue>2</issue><fpage>47</fpage><lpage>54</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Щукин А.С., Коновалихин С.В., Ковалёв Д.Ю., Сычёв А.Е., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Щукин А.С., Коновалихин С.В., Ковалёв Д.Ю., Сычёв А.Е.</copyright-holder><copyright-holder xml:lang="en">Shchukin A.S., Konovalikhin S.V., Kovalev D.Y., Sytschev A.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://cvmet.misis.ru/jour/article/view/1104">https://cvmet.misis.ru/jour/article/view/1104</self-uri><abstract><p>Проведены исследования состава и кристаллической структуры соединений, полученных методом самораспространяющегося высокотемпературного синтеза (СВС) из порошковой смеси состава, ат.%: 5Ta—2Ni—3Al с последующим вакуумным переплавом при температуре 3000 °C. В результате СВС получен продукт, содержащий фазы TaNiAl (τ1-фаза Лавеса), NiAl, Ni2Al3 и Ta. Его микроструктура характеризуется наличием тройных фаз, имеющих, по данным элементного анализа, состав Ta85Ni7Al8, Ta52Ni20Al28 и Ta53Ni25Al22. На рентгенограмме переплавленного материала обнаружены отражения, не принадлежащие ни одной из известных тройных фаз в рассматриваемой системе Ta—Ni—Al. На основе гомологического подхода установлено, что эти отражения принадлежат трем фазам со структурными типами W6Fe7 (R3m), Ti2Ni (Fd3m) и Ta3Al (P42/mnm). Их удалось идентифицировать как отражения трех соединений Ta6,5Ni6,5, Ti2Ni и Ta2,84Al0,91 с параметрами элементарной ячейки, отличающимися от таковых для этих же соединений при сохранении структурного типа. Отмечено увеличение параметров элементарной ячейки всех обнаруженных фаз по сравнению с известными бинарными интерметаллидами. Это может быть связано с наличием в кристаллической решетке атомов Al для фазы Ta6,5Ni6,5 и атомов Al и Ta в фазе со структурным типом Ti2Ni. Методом рентгеноструктурного анализа и кристаллохимического моделирования фазы Ta6,5Ni6,5 и Ti2Ni идентифицированы как Ta6Ni6Al и Ta2Ni0,5Al0,5, определены их структурный тип, состав и параметры элементарной ячейки. Методом полнопрофильного анализа проведено уточнение структуры и состава, а также определены параметры элементарной ячейки фаз и их количественное соотношение в материале. Установлен фазовый состав материала, мас.%: 47 Ta6Ni6Al, 16 Ta2Ni0,5Al0,5 и 37 Ta3Al.</p></abstract><trans-abstract xml:lang="en"><p>The study covers the composition and crystal structure of compounds produced by self-propagating high-temperature synthesis (SHS) from the 5Ta—2Ni—3Al (at.%) powder mixture followed by vacuum remelting at 3000 °C. The SHS product contains the following phases: TaNiAl (Laves τ1-phase), NiAl, Ni2Al3, and Ta. Its microstructure features by the presence ofternary phases with the composi­tion Ta85Ni7Al8, Ta52Ni20Al28 and Ta53Ni25Al22 according to elemental analysis. The X-ray diffraction pattern of the remelted material revealed reflections that do not belong to any of the known ternary phases in the Ta—Ni—Al system considered. Based on the homological approach, it was found that these reflections belong to three phases with the structural types W6Fe7 (R3m), Ti2Ni (Fd3m) and Ta3Al (P42/mnm). It was possible to define them as reflections of three compounds — Ta6,5Ni6,5, Ti2Ni and Ta2,84Al0,91 with unit cell parameters different from those for the same compounds with the retained structural type. The increase in the unit cell parameters for all the phases identified was noted as compared to the known binary intermetallics. It may be associated with the presence of Al atoms in the crystal lattice for the Ta6.5Ni6.5 phase and Al and Ta atoms in the phase with the structural type Ti2Ni. X-ray diffraction analysis and crystal-chemical modeling made it possible to identify Ta6.5Ni6.5 and Ti2Ni phases as Ta6Ni6Al and Ta2Ni0.5Al0.5, to determine their structural type, composition and unit cell parameters. Full-profile analysis was conducted to specify the structure and composition and determine unit cell parameters of the phases and their quantitative ratio in the material. The material phase composition is 47 wt.% Ta6Ni6Al, 16 wt.% Ta2Ni0.5Al0.5 and 37 wt.% Ta3Al.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>интерметаллид</kwd><kwd>тройная фаза</kwd><kwd>система Ta—Ni—Al</kwd><kwd>кристаллическая структура</kwd><kwd>кристаллохимическое моделирование</kwd><kwd>микроструктура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>intermetallic</kwd><kwd>ternary phase</kwd><kwd>Ta—Ni—Al system</kwd><kwd>crystal structure</kwd><kwd>crystal chemical modeling</kwd><kwd>microstructure</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">Raghavan V. Al—Ni—Ta (aluminum—nickel—tantalum). J. Phase Equil. Diffus. 2006. Vol. 27. No. 4. P. 405—407. DOI: 10.1007/s11669-006-0016-0.</mixed-citation><mixed-citation xml:lang="en">Raghavan V. Al—Ni—Ta (aluminum—nickel—tantalum). J. Phase Equil. Diffus. 2006. Vol. 27. No. 4. P. 405—407. 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