Open AccessIn situ phase formation during high‐temperature synthesis in clad mechanocomposites based on the Ti–Al system
Author(s) -
Loginova Marina,
Sobachkin Alexey,
Sitnikov Alexander,
Yakovlev Vladimir,
Myasnikov Andrey,
Sharafutdinov Marat,
Tolochko Boris,
Golovina Tatiana
Publication year - 2022
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577522002004
Subject(s) - materials science , in situ , atmospheric temperature range , annealing (glass) , synchrotron , analytical chemistry (journal) , cladding (metalworking) , synchrotron radiation , thermodynamics , metallurgy , chemistry , optics , physics , organic chemistry , chromatography
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 SiO 2 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 T ig = 650 ± 10°C, the maximum synthesis temperatures were in the range T max = 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, TiAl 3 and Ti 3 Al compounds begins at T = 661°C. At T max = 1465.6°C, the synthesis product is multiphase, the structures of the formed TiAl 3 (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.