Inorganic MaterialsInorganic Materials0002-337X3034-5588Russian Academy of Science10.31857/S0002337X23060118Self-Propagating High-Temperature Synthesis of a Ti–Al–Mn AlloyСамораспространяющийся высокотемпературный синтез сплава в системе Ti–Al–MnLazarevP. A.ЛазаревП. А. lazarev_p_a_noemail@ras.ruBusurinaM. L.БусуринаМ. Л. busurina_m_l_noemail@ras.ruBoyarchenkoO. D.БоярченкоО. Д. boyarchenko_o_d_noemail@ras.ruKovalevD. Yu.КовалевД. Ю. kovalev_d_yu_noemail@ras.ruSychevA. E.СычевА. Е. sychev_a_e_noemail@ras.ruИнститут структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наукMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of SciencesИнститут структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наукMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of SciencesИнститут структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наукMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of SciencesИнститут структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наук (ИСМАН)Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences (ISMAN)Институт структурной макрокинетики и проблем материаловедения им. А.Г. Мержанова Российской академии наукMerzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences01062023596705711

An alloy based on the Laves phase Ti(Mn0.75Al1.25) has been prepared by self-propagating high-temperature synthesis using a 34.8Ti + 45.2Al + 20Mn (at %) mixture. The relative density of the as-prepared samples has been shown to influence the phase composition of the alloy. In the case of a relative density of ~0.75, we obtained a single-phase intermetallic alloy with a porosity of 45%, containing ~2 wt % of Al2O3 as an impurity phase. Synthesis from a mixture with a relative density of 0.55 yielded a two-phase alloy containing a Laves phase and the τ-Ti(Al2.68Mn0.32) phase. The alloy was in a nonequilibrium state, and annealing at 1000°C for 3 h led to the formation of a single-phase alloy based on the Laves phase Ti(Mn0.75Al1.25). Its microhardness was determined to be 7.96 ± 0.8 GPa.

Методом самораспространяющегося высокотемпературного синтеза из смеси 34.8Ti + 45.2Al + + 20Mn (ат. %) получен сплав на основе фазы Лавеса Ti(Mn0.75Al1.25). Установлено влияние относительной плотности исходных образцов на фазовый состав сплава. В случае относительной плотности образцов ~0.75 получен однофазный интерметаллидный сплав с пористостью 45%, содержащий ~2 мас. % примесной фазы Al2O3. Синтез из смеси с относительной плотностью 0.55% приводит к образованию двухфазного сплава, содержащего фазу Лавеса и τ-фазу Ti(Al2.68Mn0.32). Сплав является неравновесным и его отжиг при 1000°C в течение 3 ч приводит к формированию однофазного сплава на основе фазы Лавеса Ti(Mn0.75Al1.25). Микротвердость сплава составила 7.96 ± 0.8 ГПа.

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