Investigations of the high-pressure sintered nanocrystalline mullite powder are presented. The synthesized mullite powder with crystallite size of 51 nm was densified by using high-pressure anvil-type with hollows apparatus at 4 GPa over the temperature range of 1100-1500 degrees C in 100 degrees C steps. The phase composition and structural parameters of the densified samples were studied as a function of densification temperature. The XRD analysis revealed the appearance of new phases, such as kyanite and corundum, whose development affected the densities of the sintered samples. High relative densities of the sintered samples were obtained because of the application of high pressure. The needle-like microstructure was developed owing to the anisotropic grain growth of mullite. The elongated mullite grains reached the length of approximately 5 mu m at 1400 degrees C, whereas the grains treated at 1500 degrees C became thicker preserving the same needle length. The Vickers microhardne...ss of the developed microstructures increased with the increase of temperature up to 1400 degrees C, while at 1500 degrees C it was slightly reduced due to the grain coarsening. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Кључне речи:
Sol-gel process / Microstructure / Hardness / Mullite
TY - JOUR
AU - Ilić, Svetlana M.
AU - Zec, Slavica
AU - Rosić, Milena
AU - Maksimović, Vesna
AU - Ružić, Jovana
AU - Urbanovich, Vladimir
AU - Matović, Branko
PY - 2016
UR - https://vinar.vin.bg.ac.rs/handle/123456789/925
AB - Investigations of the high-pressure sintered nanocrystalline mullite powder are presented. The synthesized mullite powder with crystallite size of 51 nm was densified by using high-pressure anvil-type with hollows apparatus at 4 GPa over the temperature range of 1100-1500 degrees C in 100 degrees C steps. The phase composition and structural parameters of the densified samples were studied as a function of densification temperature. The XRD analysis revealed the appearance of new phases, such as kyanite and corundum, whose development affected the densities of the sintered samples. High relative densities of the sintered samples were obtained because of the application of high pressure. The needle-like microstructure was developed owing to the anisotropic grain growth of mullite. The elongated mullite grains reached the length of approximately 5 mu m at 1400 degrees C, whereas the grains treated at 1500 degrees C became thicker preserving the same needle length. The Vickers microhardness of the developed microstructures increased with the increase of temperature up to 1400 degrees C, while at 1500 degrees C it was slightly reduced due to the grain coarsening. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB - Elsevier
T2 - Ceramics International
T1 - High pressure densification of nanocrystalline mullite powder
VL - 42
IS - 4
SP - 5319
EP - 5325
DO - 10.1016/j.ceramint.2015.12.062
ER -
@article{
author = "Ilić, Svetlana M. and Zec, Slavica and Rosić, Milena and Maksimović, Vesna and Ružić, Jovana and Urbanovich, Vladimir and Matović, Branko",
year = "2016",
abstract = "Investigations of the high-pressure sintered nanocrystalline mullite powder are presented. The synthesized mullite powder with crystallite size of 51 nm was densified by using high-pressure anvil-type with hollows apparatus at 4 GPa over the temperature range of 1100-1500 degrees C in 100 degrees C steps. The phase composition and structural parameters of the densified samples were studied as a function of densification temperature. The XRD analysis revealed the appearance of new phases, such as kyanite and corundum, whose development affected the densities of the sintered samples. High relative densities of the sintered samples were obtained because of the application of high pressure. The needle-like microstructure was developed owing to the anisotropic grain growth of mullite. The elongated mullite grains reached the length of approximately 5 mu m at 1400 degrees C, whereas the grains treated at 1500 degrees C became thicker preserving the same needle length. The Vickers microhardness of the developed microstructures increased with the increase of temperature up to 1400 degrees C, while at 1500 degrees C it was slightly reduced due to the grain coarsening. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "High pressure densification of nanocrystalline mullite powder",
volume = "42",
number = "4",
pages = "5319-5325",
doi = "10.1016/j.ceramint.2015.12.062"
}
Ilić, S. M., Zec, S., Rosić, M., Maksimović, V., Ružić, J., Urbanovich, V.,& Matović, B.. (2016). High pressure densification of nanocrystalline mullite powder. in Ceramics International
Elsevier., 42(4), 5319-5325.
https://doi.org/10.1016/j.ceramint.2015.12.062
Ilić SM, Zec S, Rosić M, Maksimović V, Ružić J, Urbanovich V, Matović B. High pressure densification of nanocrystalline mullite powder. in Ceramics International. 2016;42(4):5319-5325.
doi:10.1016/j.ceramint.2015.12.062 .
