Effect of initial powders on properties of FeAlSi intermetallics

0522773 - FZÚ 2020 RIV CH eng J - Článek v odborném periodiku
Čech, J. - Haušild, P. - Karlík, M. - Bouček, V. - Nová, K. - Průša, F. - Novák, P. - Kopeček, Jaromír
Effect of initial powders on properties of FeAlSi intermetallics.
Materials. Roč. 12, č. 18 (2019), s. 1-16, č. článku 2846. E-ISSN 1996-1944
Grant CEP: GA ČR(CZ) GA17-07559S
Institucionální podpora: RVO:68378271
Klíčová slova: FeAlSi * intermetallic alloys * mechanical alloying * spark plasma sintering * microstructure * nanoindentation * mechanical properties
Obor OECD: Materials engineering
Impakt faktor: 3.057, rok: 2019
Způsob publikování: Open access

FeAlSi intermetallics are materials with promising high-temperature mechanical properties and oxidation resistance. Nevertheless, their production by standard metallurgical processes is complicated. In this study, preparation of powders by mechanical alloying and properties of the samples compacted by spark plasma sintering was studied. Various initial feedstock materials were mixed to prepare the material with the same chemical composition. Time of mechanical alloying leading to complete homogenization of powders was estimated based on the microstructure observations, results of XRD and indentation tests. Microstructure, phase composition, hardness and fracture toughness of sintered samples was studied and compared with the properties of powders before the sintering process. It was found that independently of initial feedstock powder, the resulting phase composition was the same (Fe3Si + FeSi). The combination of hard initial powders required the longest milling time, but it led to the highest values of fracture toughness.
Trvalý link: http://hdl.handle.net/11104/0307212