Features of High-Temperature Synthesis in Clad Mechanocomposites of Ti-Al System

The influence of mechanoactivated reagents cladding on the structural-phase state of the SHS-products was investigated. Titanium and aluminum powders were used as reagents. Mechanical activation was performed on the AGO-2 planetary ball mill. The coating on Ti+Al mechanocomposite was carried out usi...

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Veröffentlicht in:Diffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum Defect and diffusion forum, 2021-08, Vol.410, p.348-352
Hauptverfasser: Filimonov, Valery Yu, Sobachkin, Alexey, Loginova, Marina V.
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Sprache:eng
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Zusammenfassung:The influence of mechanoactivated reagents cladding on the structural-phase state of the SHS-products was investigated. Titanium and aluminum powders were used as reagents. Mechanical activation was performed on the AGO-2 planetary ball mill. The coating on Ti+Al mechanocomposite was carried out using magnetron installation “VSE-PVD-Power”. At deposition time of 40 minutes, the reaction start temperature increases from 525 °C to 648 °C (compared to reagents without cladding). It can be assumed that an increase in the thickness of the deposited SiO2 film serves as a barrier to the reaction start, thereby increasing ignition temperature. Apart from pretreatment, the phase composition of the final product contains intermetallic compounds TiAl, TiAl3, Ti3Al5, as well as the small amount of residual Ti. The main phase is TiAl.
ISSN:1012-0386
1662-9507
1662-9507
DOI:10.4028/www.scientific.net/DDF.410.348