Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics
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2017
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Dense yttria ceramics were prepared by Spark Plasma Sintering of a nanopowder synthesized using a PEG assisted combustion method. Densification occurs between 800 degrees C and 900 degrees C without any additive. This corresponds to one of the lowest sintering temperature found in the literature for Y2O3. Because of a significant release of organic species, the Y2O3 precursors obtained by this synthesis route contains macropores that have a negative impact on the final microstructure. We show that the emergence of these macropores can be minimized by decreasing the annealing temperature used for the precursor powder (in a temperature range of 300-650 degrees C) as opposed to the usual 800 degrees C. Finally, a precursor annealed at 650 degrees C allows us to obtain fully dense ceramics, with a very fine and homogeneous microstructure (and a grain size around 300 nm). Vickers microhardness and fracture toughness were measured and discussed in relation to the microstructure of the cerami...cs.
Ključne reči:
A. Grain growth / A. Sintering / B. Electron microscopy / D. Y2O3Izvor:
Ceramics International, 2017, 43, 17, 15834-15841Finansiranje / projekti:
- La Mairie de Paris
DOI: 10.1016/j.ceramint.2017.08.153
ISSN: 0272-8842; 1873-3956
WoS: 000413175300173
Scopus: 2-s2.0-85028362282
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VinčaTY - JOUR AU - Krsmanović, Radenka AU - Bregiroux, Damien AU - Viana, Bruno PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1787 AB - Dense yttria ceramics were prepared by Spark Plasma Sintering of a nanopowder synthesized using a PEG assisted combustion method. Densification occurs between 800 degrees C and 900 degrees C without any additive. This corresponds to one of the lowest sintering temperature found in the literature for Y2O3. Because of a significant release of organic species, the Y2O3 precursors obtained by this synthesis route contains macropores that have a negative impact on the final microstructure. We show that the emergence of these macropores can be minimized by decreasing the annealing temperature used for the precursor powder (in a temperature range of 300-650 degrees C) as opposed to the usual 800 degrees C. Finally, a precursor annealed at 650 degrees C allows us to obtain fully dense ceramics, with a very fine and homogeneous microstructure (and a grain size around 300 nm). Vickers microhardness and fracture toughness were measured and discussed in relation to the microstructure of the ceramics. T2 - Ceramics International T1 - Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics VL - 43 IS - 17 SP - 15834 EP - 15841 DO - 10.1016/j.ceramint.2017.08.153 ER -
@article{ author = "Krsmanović, Radenka and Bregiroux, Damien and Viana, Bruno", year = "2017", abstract = "Dense yttria ceramics were prepared by Spark Plasma Sintering of a nanopowder synthesized using a PEG assisted combustion method. Densification occurs between 800 degrees C and 900 degrees C without any additive. This corresponds to one of the lowest sintering temperature found in the literature for Y2O3. Because of a significant release of organic species, the Y2O3 precursors obtained by this synthesis route contains macropores that have a negative impact on the final microstructure. We show that the emergence of these macropores can be minimized by decreasing the annealing temperature used for the precursor powder (in a temperature range of 300-650 degrees C) as opposed to the usual 800 degrees C. Finally, a precursor annealed at 650 degrees C allows us to obtain fully dense ceramics, with a very fine and homogeneous microstructure (and a grain size around 300 nm). Vickers microhardness and fracture toughness were measured and discussed in relation to the microstructure of the ceramics.", journal = "Ceramics International", title = "Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics", volume = "43", number = "17", pages = "15834-15841", doi = "10.1016/j.ceramint.2017.08.153" }
Krsmanović, R., Bregiroux, D.,& Viana, B.. (2017). Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics. in Ceramics International, 43(17), 15834-15841. https://doi.org/10.1016/j.ceramint.2017.08.153
Krsmanović R, Bregiroux D, Viana B. Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics. in Ceramics International. 2017;43(17):15834-15841. doi:10.1016/j.ceramint.2017.08.153 .
Krsmanović, Radenka, Bregiroux, Damien, Viana, Bruno, "Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics" in Ceramics International, 43, no. 17 (2017):15834-15841, https://doi.org/10.1016/j.ceramint.2017.08.153 . .