The Influence of Powder Milling on Properties of SPS Compacted FeAl

0525009 - ÚJF 2021 RIV CH eng J - Journal Article
Michalcová, A. - Ozkan, M. - Mikula, Pavol - Marek, I. - Knaislová, A. - Kopeček, Jaromír - Vojtěch, D.
The Influence of Powder Milling on Properties of SPS Compacted FeAl.
Molecules. Roč. 25, č. 9 (2020), č. článku 2263. E-ISSN 1420-3049
R&D Projects: GA MŠMT LM2015056; GA MŠMT(CZ) EF16_019/0000760
Research Infrastructure: Reactors LVR-15 and LR-0 II - 90120
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : FeAl * ball milling * SPS compaction * neutron diffraction
OECD category: Materials engineering; Materials engineering (FZU-D)
Impact factor: 4.412, year: 2020
Method of publishing: Open access
https://doi.org/10.3390/molecules25092263

The Fe-28 at.% Al alloy was studied in this article. The aim was to describe the influence of gas atomized powder pre-milling before SPS (Spark Plasma Sintering) sintering on the structure and properties of the bulk materials. The initial powder was milled for 0.5, 1, and 8 h. It was proven that 1 h milling leads to the change in size and morphology of the particles, B2 -> A2 phase transformation, and to the contamination with the material from a milling vessel. Powder materials were compacted by the SPS process at 900, 1000, and 1100 degrees C. The differences between the bulk materials were tested by LM, SEM, and TEM microscopy, XRD, and neutron diffraction methods. It was proven that, although the structures of initial powder (B2) and milled powder (A2) were different, both provide after-sintering material with the same structure (D0(3)) with similar structural parameters. Higher hardness and improved ductility of the material sintered from the milled powder are likely caused by the change in chemical composition during the milling process.
Permanent Link: http://hdl.handle.net/11104/0309214