Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids
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Centre for Functional and Surface Functionalised Glass, Alexander Dubcek University of Trencin, 91150 Trencin, Slovakia
2
CEITEC BUT, Brno University of Technology, Purkynova 123, 62100 Brno, Czech Republic
3
Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2, 62100 Brno, Czech Republic
4
Joint Glass Centre of the IIC SAS, TnUAD and FChPT STU, 91150 Trencin, Slovakia
*
Author to whom correspondence should be addressed.
Materials 2020, 13(1), 102; https://doi.org/10.3390/ma13010102
Received: 3 December 2019
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Revised: 17 December 2019
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Accepted: 20 December 2019
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Published: 24 December 2019
(This article belongs to the Collection Advanced Powder Metallurgy Technologies)
Highly dense magnesium aluminate spinel bodies are usually fabricated using pressure-assisted methods, such as spark plasma sintering (SPS), in the presence of lithium fluoride as a sintering aid. The present work investigates whether the addition of transition metal fluorides promotes the sintering of MgAl2O4 bodies during SPS. At the same time, such fluorides can act as a source of optically active dopants. A commercial MgAl2O4 was mixed with 0.5 wt% of LiF, MnF2, and CoF2 and, afterwards, consolidated using SPS at 1400 °C. Although MnF2 and CoF2 promote the densification as effectively as LiF, they cause significant grain growth.
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Keywords:
MgAl2O4; lithium fluoride; cobalt fluoride; manganese fluoride; spark plasma sintering; grain growth
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MDPI and ACS Style
Talimian, A.; Pouchly, V.; Maca, K.; Galusek, D. Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids. Materials 2020, 13, 102. https://doi.org/10.3390/ma13010102
AMA Style
Talimian A, Pouchly V, Maca K, Galusek D. Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids. Materials. 2020; 13(1):102. https://doi.org/10.3390/ma13010102
Chicago/Turabian StyleTalimian, Ali, Vaclav Pouchly, Karel Maca, and Dusan Galusek. 2020. "Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids" Materials 13, no. 1: 102. https://doi.org/10.3390/ma13010102
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