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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-2025-2-5-14</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-974</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>Сравнение характеристик магнитотвердых порошковых изотропных Fe–Cr–Co-сплавов, легированных титаном и гидридом титана</article-title><trans-title-group xml:lang="en"><trans-title>Comparison of properties of hard magnetic isotropic powder-processed Fe–Cr–Co alloys doped with titanium and titanium hydride</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1578-4883</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Устюхин</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ustyukhin</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Сергеевич Устюхин – к.т.н., мл. науч. сотрудник лабо­ратории физикохимии поверхности и ультрадисперсных порош­ковых материалов</p><p>Россия, 119334, г. Москва, Ленинский пр-т, 49</p></bio><bio xml:lang="en"><p>Aleksei S. Ustyukhin – Cand. Sci. (Eng.), Junior Research Scientist at the Laboratory of Physical Chemistry of Surfaces and Ultrafine Powder Materials</p><p>49 Leninskiy Prosp., Moscow 119334, Russia</p></bio><email xlink:type="simple">fcbneo@yandex.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/0000-0002-4441-9132</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зеленский</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zelensky</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Александрович Зеленский – к.ф.-м.н., вед. науч. сот­рудник лаборатории физикохимии поверхности и ультрадисперсных порошковых материалов</p><p>Россия, 119334, г. Москва, Ленинский пр-т, 49</p></bio><bio xml:lang="en"><p>Viktor A. Zelensky – Cand. Sci. (Phys.-Math.), Leading Researcher at the Laboratory of Physical Chemistry of Surfaces and Ultrafine Powder Materials</p><p>49 Leninskiy Prosp., Moscow 119334, Russia</p></bio><email xlink:type="simple">zelensky55@bk.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/0000-0002-0591-2645</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Миляев</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Milyaev</surname><given-names>I. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Матвеевич Миляев – д.т.н., вед. науч. сотрудник лаборатории пластической деформации металлических материалов </p><p>Россия, 119334, г. Москва, Ленинский пр-т, 49</p></bio><bio xml:lang="en"><p>Igor M. Milyaev – Dr. Sci. (Eng.), Leading Researcher at the Laboratory of Plastic Deformation of Metallic Materials</p><p>49 Leninskiy Prosp., Moscow 119334, Russia</p></bio><email xlink:type="simple">imilyaev@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/0000-0002-8285-5656</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковалев</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>Дмитрий Юрьевич Ковалев – д.ф-м.н., зав. лабораторией рентгеноструктурных исследований Института структурной макрокинетики и проблем материаловедения</p><p>Россия, 142432, Московская обл., г. Черноголовка, ул. Акад. Осипьяна, 8</p></bio><bio xml:lang="en"><p>Dmitry Yu. Kovalev – дDr. Sci. (Phys.-Math.), Head of the Laboratory of X-Ray Investigation</p><p>8 Academician Osipyan Str., Chernogolovka, Moscow Region 142432, Russia</p></bio><email xlink:type="simple">kovalev@ism.ac.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6395-3747</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шустов</surname><given-names>В . С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shustov</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вадим Сергеевич Шустов – к.т.н., науч. сотрудник лаборатории физикохимии поверхности и ультрадисперсных порошковых материалов</p><p>Россия, 119334, г. Москва, Ленинский пр-т, 49</p></bio><bio xml:lang="en"><p>Vadim S. Shustov – Cand. Sci. (Eng.), Senior Research Scientist at the Laboratory of Physical Chemistry of Surfaces and Ultrafine Powder Materials</p><p>49 Leninskiy Prosp., Moscow 119334, Russia</p></bio><email xlink:type="simple">vshscience@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/0000-0001-6147-5753</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алымов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Alymov</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Иванович Алымов – д.т.н., чл.кор. РАН, директор ИСМАН, зав. лабораторией физикохимии поверхности и ультра­дисперсных порошковых материалов ИМЕТ РАН</p><p>Россия, 119334, г. Москва, Ленинский пр-т, 49</p><p>Россия, 142432, Московская обл., г. Черноголовка, ул. Акад. Осипьяна, 8</p></bio><bio xml:lang="en"><p>Mikhail I. Alymov – Dr. Sci. (Eng.), Corresponding Member of RAS, Director of ISMAN, Head of the Laboratory of Physical Chemistry of Surfaces and Ultrafine Powder Materials, IMET RAS</p><p>49 Leninskiy Prosp., Moscow 119334, Russia</p><p>8 Academician Osipyan Str., Chernogolovka, Moscow Region 142432, Russia</p></bio><email xlink:type="simple">mialymov@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук<country>Россия</country></aff><aff xml:lang="en">A.A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Институт структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук; Институт структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наук<country>Россия</country></aff><aff xml:lang="en">A.A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences; Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>21</day><month>04</month><year>2025</year></pub-date><volume>19</volume><issue>2</issue><fpage>5</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; НИТУ "МИСИС", 2025</copyright-statement><copyright-year>2025</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/974">https://powder.misis.ru/jour/article/view/974</self-uri><abstract><p>В работе проведено сравнительное исследование плотности, фазового состава, магнитных и механических свойств изотропных порошковых сплавов Fe–28Cr–15Co и Fe–32Cr–22Co, легированных 2 мас. % титана в виде обычного порошка титана ПТС-1 и порошка гидрида титана. Процесс получения образцов состоял из приготовления исходной смеси порошков, прессования, спекания в вакууме, закалки и термической обработки для формирования магнитных свойств. Использование порошка гидрида титана привело к повышению остаточной пористости образцов с 2 до 4 %. Было отмечено существенное отличие фазового состава сплавов после спекания: структура образца Fe–28Cr–15Co–2Ti состояла из твердого раствора ОЦК α-фазы и включений тетрагональной σ-фазы, а Fe–32Cr–22Co–2Ti – из твердого раствора σ-фазы и включений ГЦК γ-фазы. После термической обработки структура всех сплавов представляла собой твердый раствор ОЦК α-фазы. В образцах с гидридом титана были также обнаружены малые следы примесной фазы, которая, вероятнее всего, является гидридом интерметаллического соединения титана и хрома. Образцы, в которых использовался порошок титана ПТС-1, имели более высокие значения остаточной индукции (Br до 0,84 и 0,82 Тл у сплавов Fe–28Cr–15Co–2Ti и Fe–32Cr–22Co–2Ti соответственно) по сравнению с образцами, содержащими гидрид титана (до 0,8 и 0,79 Тл соот­ветственно), что связано с разницей в остаточной пористости. С другой стороны, образцы с порошком гидрида титана имели более высокие показатели коэрцитивной силы (Hc до 41,1 и 57,2 кА/м у сплавов Fe–28Cr–15Co–2Ti и Fe–32Cr–22Co–2Ti соответственно) по сравнению с образцам, содержащими с порошок титана (до 38,4 и 49,2 кА/м соответственно). Наиболее высокие значения максимального энергетического произведения (BH)max составили 11,0–11,5 кДж/м3 у сплавов Fe–28Cr–15Co–2Ti и 14,0–14,5 кДж/м3 у Fe–32Cr–22Co–2Ti и практически не зависели от типа введенного титана. Кривые деформирования при сжатии сплавов с разными источниками титана были практически идентичны. Образцы состава Fe–32Cr–22Co–2Ti имели более высокие значения предела текучести (σ0,2 = 1200÷1400 МПа) по сравнению со сплавами Fe–28Cr–15Co–2Ti (σ0,2 = 1000 МПа). Все исследованные в работе материалы оказались пластичными.</p></abstract><trans-abstract xml:lang="en"><p>This study presents a comparative investigation of the density, phase composition, magnetic, and mechanical properties of isotropic powder metallurgy alloys Fe–28Cr–15Co and Fe–32Cr–22Co doped with 2 wt. % titanium introduced either as conventional titanium powder (PTS-1 grade) or as titanium hydride powder. The sample fabrication process included powder blend prepa­ration, compaction, vacuum sintering, quenching, and heat treatment aimed at developing magnetic properties. The use of titanium hydride powder resulted in an increase in residual porosity from 2 to 4 %. A significant difference in the phase composition of the alloys after sintering was observed: the structure of the Fe–28Cr–15Co–2Ti alloy consisted of a BCC α-phase solid solution and tetragonal σ-phase inclusions, while Fe–32Cr–22Co–2Ti exhibited a σ-phase solid solution matrix with FCC γ-phase inclusions. After heat treatment, all alloys deve­loped a BCC α-phase solid solution structure. In the samples containing titanium hydride, minor traces of an impurity phase – most likely a hydride of a titanium–chromium intermetallic compound – were also detected. Samples prepared using PTS-1 titanium powder exhi­bited higher residual induction values (Br up to 0.84 and 0.82 T for Fe–28Cr–15Co–2Ti and Fe–32Cr–22Co–2Ti, respectively) compared to those containing titanium hydride (up to 0.80 and 0.79 T, respectively), which is attributed to diffe­rences in residual porosity. On the other hand, samples with titanium hydride powder showed higher coercivity values (Hc up to 41.1 and 57.2 kA/m for Fe–28Cr–15Co–2Ti and Fe–32Cr–22Co–2Ti, respectively) compared to those with titanium powder (up to 38.4 and 49.2 kA/m, respectively). The maximum energy product ((BH)max ) reached 11.0–11.5 kJ/m3 for Fe–28Cr–15Co–2Ti and 14.0–14.5 kJ/m3 for Fe–32Cr–22Co–2Ti, with virtually no dependence on the titanium source. The compression stress–strain curves for alloys with different titanium sources were nearly identical. Alloys of the Fe–32Cr–22Co–2Ti composition exhibited higher yield strength values (σ0.2 = 1200–1400 MPa) compared to Fe–28Cr–15Co–2Ti alloys (σ0.2 = 1000 MPa). All materials studied in this work demonstrated ductility.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>порошковая металлургия</kwd><kwd>термическая обработка</kwd><kwd>Fe–Cr–Co-сплавы</kwd><kwd>легирование</kwd><kwd>пористость</kwd><kwd>магнитные свойства</kwd><kwd>механические свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>powder metallurgy</kwd><kwd>heat treatment</kwd><kwd>Fe–Cr–Co alloys</kwd><kwd>doping</kwd><kwd>porosity</kwd><kwd>magnetic properties</kwd><kwd>mechanical properties</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке РНФ, проект № 24-29-00323.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>This work was financially supported by the Russian Science Foundation, Project No. 24-29-00323.</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">Kaneko H., Homma M., Minowa T. 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