Formation of phases in reactively sintered TiAl.sub.3./sub. alloy

0533533 - FZÚ 2021 RIV CH eng J - Journal Article
Školáková, Andrea - Salvetr, P. - Leitner, J. - Lovaši, T. - Novák, P.
Formation of phases in reactively sintered TiAl₃ alloy.
Molecules. Roč. 25, č. 8 (2020), s. 1-13, č. článku 1912. E-ISSN 1420-3049
Institutional support: RVO:68378271
Keywords : Ti-Al system * reactive sintering * combustion * kinetics * microstructure
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.412, year: 2020
Method of publishing: Open access

This work highlights new results on the synthesis of the TiAl3 intermetallic phase using self-propagating high-temperature synthesis. This method is considered a promising sintering route for intermetallic compounds. It was found that the reactions proceed in two stages. Below the melting point of aluminum, the Ti2Al5 phase forms at 450 °C after long annealing times by a direct solid-state reaction between the aluminum and titanium, and is converted consequently to TiAl3. This is a completely new finding, until now, many authors have believed in the preferential formation of the TiAl3 phase. The second stage, the self-propagating strongly exothermic reaction, proceeds above the melting point of aluminum. It leads to the formation of the TiAl3 phase accompanied by Ti2Al5 and Ti3Al phases.

Permanent Link: http://hdl.handle.net/11104/0311906