In situ phase formation during high-temperature synthesis in clad mechanocomposites based on the Ti–Al system
| Autor: | Marina Loginova, Alexey Sobachkin, Alexander Sitnikov, Vladimir Yakovlev, Andrey Myasnikov, Marat Sharafutdinov, Boris Tolochko, Tatiana Golovina |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Synchrotron Radiation, Vol 29, Iss 3, Pp 698-710 (2022) |
| Druh dokumentu: | article |
| ISSN: | 1600-5775 16005775 |
| DOI: | 10.1107/S1600577522002004 |
| Popis: | An in situ synchrotron experimental study of phase formation dynamics in clad mechanocomposites of Ti–Al systems during high-temperature synthesis was performed. Cladding of the obtained mechanocomposites was carried out with an SiO2 target, with a deposition time of 40 min. The high-temperature synthesis was performed using the thermal explosion method based on a microwave induction heater in the in situ mode on an experimental setup adapted to synchrotron radiation time-resolved diffractometry. The influence of the cladding on the macrokinetic parameters of synthesis in situ was investigated experimentally. It was found that for an ignition temperature Tig = 650 ± 10°C, the maximum synthesis temperatures were in the range Tmax = 1380–1465°C. The characteristic heating speed was 525 K min−1. The sequence and temperature–time interval of phase formation are determined. The formation of the TiAl, TiAl3 and Ti3Al compounds begins at T = 661°C. At Tmax = 1465.6°C, the synthesis product is multiphase, the structures of the formed TiAl3 (content about 70%) and TiAl (content about 25%) have a nonequilibrium state. At the stage of system annealing with T = 1384.9°C, the reaction of the components occurs with the formation of almost monophase TiAl (content of more than 90%); Ti occupies the rest. |
| Databáze: | Directory of Open Access Journals |
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