The Influence of Powder Milling on Properties of SPS Compacted FeAl
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Departments of Metals and Corrosion Engineering, University of Chemistry and Technology, 166 28 Prague 6, Czech Republic
2
Nuclear Physics Institute ASCR, v.v.i., 250 68 Řež, Czech Republic
3
FZU—Institute of Physics of the CAS, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editors: Pavel Novak, Giuseppe Cirillo and Venkatesh Vijayaraghavan
Molecules 2020, 25(9), 2263; https://doi.org/10.3390/molecules25092263
Received: 31 March 2020
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Revised: 20 April 2020
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Accepted: 7 May 2020
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Published: 11 May 2020
(This article belongs to the Special Issue Intermetallics: Synthesis, Structure, Function)
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 °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 (D03) 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.
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Keywords:
FeAl; ball milling; SPS compaction; neutron diffraction
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MDPI and ACS Style
Michalcová, A.; Özkan, M.; Mikula, P.; Marek, I.; Knaislová, A.; Kopeček, J.; Vojtěch, D. The Influence of Powder Milling on Properties of SPS Compacted FeAl. Molecules 2020, 25, 2263. https://doi.org/10.3390/molecules25092263
AMA Style
Michalcová A, Özkan M, Mikula P, Marek I, Knaislová A, Kopeček J, Vojtěch D. The Influence of Powder Milling on Properties of SPS Compacted FeAl. Molecules. 2020; 25(9):2263. https://doi.org/10.3390/molecules25092263
Chicago/Turabian StyleMichalcová, Alena, Murat Özkan, Pavol Mikula, Ivo Marek, Anna Knaislová, Jaromír Kopeček, and Dalibor Vojtěch. 2020. "The Influence of Powder Milling on Properties of SPS Compacted FeAl" Molecules 25, no. 9: 2263. https://doi.org/10.3390/molecules25092263
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