Synthesis of intermetallics in Fe-Al-Si system by mechanical alloying

0505321 - FZÚ 2020 RIV CH eng J - Journal Article
Nová, K. - Novák, P. - Průša, F. - Kopeček, Jaromír - Čech, J.
Synthesis of intermetallics in Fe-Al-Si system by mechanical alloying.
Metals. Roč. 9, č. 1 (2019), s. 1-14, č. článku 20. E-ISSN 2075-4701
R&D Projects: GA ČR(CZ) GA17-07559S; GA MŠMT EF16_013/0001406
Grant - others:OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institutional support: RVO:68378271
Keywords : powder metallurgy * intermetallics * mechanical alloying * iron aluminide * iron silicide
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.117, year: 2019
Method of publishing: Open access

Fe-Al-Si alloys have been recently developed in order to obtain excellent high-temperature mechanical properties and oxidation resistance. However, their production by conventional metallurgical processes is problematic. In this work, an innovative processing method, based on ultra-high energy mechanical alloying, has been tested for the preparation of these alloys. It has been found that the powders of low-silicon alloys (up to 10 wt. %) consist of FeAl phase supersaturated by Si after mechanical alloying. Fe2Al5 phase forms as a transient phase at the initial stage of mechanical alloying. The alloy containing 20 wt. % of Si and 20 wt. % of Al is composed mostly of iron silicides (Fe3Si and FeSi) and FeAl ordered phase. Thermal stability of the mechanically alloyed powders was studied in order to predict the sintering behavior during possible compaction via spark plasma sintering or other methods.
Permanent Link: http://hdl.handle.net/11104/0296779