<i>In situ</i>phase formation during high-temperature synthesis in clad mechanocomposites based on the Ti–Al system

<jats:p>An<jats:italic>in situ</jats:italic>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<jats:sub>2</jats:sub>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<jats:italic>in situ</jats:italic>mode on an experimental setup adapted to synchrotron radiation time-resolved diffractometry. The influence of the cladding on the macrokinetic parameters of synthesis<jats:italic>in situ</jats:italic>was investigated experimentally. It was found that for an ignition temperature<jats:italic>T</jats:italic><jats:sub>ig</jats:sub>= 650 ± 10°C, the maximum synthesis temperatures were in the range<jats:italic>T</jats:italic><jats:sub>max</jats:sub>= 1380–1465°C. The characteristic heating speed was 525 K min<jats:sup>−1</jats:sup>. The sequence and temperature–time interval of phase formation are determined. The formation of the TiAl, TiAl<jats:sub>3</jats:sub>and Ti<jats:sub>3</jats:sub>Al compounds begins at<jats:italic>T</jats:italic>= 661°C. At<jats:italic>T</jats:italic><jats:sub>max</jats:sub>= 1465.6°C, the synthesis product is multiphase, the structures of the formed TiAl<jats:sub>3</jats:sub>(content about 70%) and TiAl (content about 25%) have a nonequilibrium state. At the stage of system annealing with<jats:italic>T</jats:italic>= 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.</jats:p>