TY  - JOUR
AU  - Corlett, Cole A.
AU  - Obradović, Nina
AU  - Watts, Jeremy L.
AU  - Bohannan, Eric W.
AU  - Fahrenholtz, William G.
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14708
AB  - The synthesis, densification behavior, and crystallographic site occupancy were investigated for four different spinel-based ceramics, including a high-entropy spinel (Co0.2Cu0.2Mg0.2Ni0.2 Zn0.2)Al2O4. Each composition was reacted to form a single phase, but analysis of X-ray diffraction patterns revealed differences in cation site occupancy with the high-entropy spinel being nearly fully normal. Densification behavior was investigated and showed that fully dense ceramics could be produced by hot pressing at temperatures as low as 1375°C for all compositions. Vickers’ hardness values were at least 10 GPa for all compositions. The cations present in the high-entropy spinel appear to have a stabilizing effect that led to nearly normal site occupancy compared to full cation inversion behavior of nickel aluminate spinel. This is the first report that compares cation site occupancy of a high-entropy spinel to conventional spinel ceramics.
PB  - Informa UK Limited
T2  - Journal of Asian Ceramic Societies
T1  - Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel
SP  - 1
SP  - 330
EP  - 8
EP  - 337
VL  - 11
IS  - 3
DO  - 10.1080/21870764.2023.2227535
UR  - https://hdl.handle.net/21.15107/rcub_dais_14708
ER  - 

@article{
author = "Corlett, Cole A. and Obradović, Nina and Watts, Jeremy L. and Bohannan, Eric W. and Fahrenholtz, William G.",
year = "2023",
abstract = "The synthesis, densification behavior, and crystallographic site occupancy were investigated for four different spinel-based ceramics, including a high-entropy spinel (Co0.2Cu0.2Mg0.2Ni0.2 Zn0.2)Al2O4. Each composition was reacted to form a single phase, but analysis of X-ray diffraction patterns revealed differences in cation site occupancy with the high-entropy spinel being nearly fully normal. Densification behavior was investigated and showed that fully dense ceramics could be produced by hot pressing at temperatures as low as 1375°C for all compositions. Vickers’ hardness values were at least 10 GPa for all compositions. The cations present in the high-entropy spinel appear to have a stabilizing effect that led to nearly normal site occupancy compared to full cation inversion behavior of nickel aluminate spinel. This is the first report that compares cation site occupancy of a high-entropy spinel to conventional spinel ceramics.",
publisher = "Informa UK Limited",
journal = "Journal of Asian Ceramic Societies",
title = "Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel",
pages = "1-330-8-337",
volume = "11",
number = "3",
doi = "10.1080/21870764.2023.2227535",
url = "https://hdl.handle.net/21.15107/rcub_dais_14708"
}

Corlett, C. A., Obradović, N., Watts, J. L., Bohannan, E. W.,& Fahrenholtz, W. G.. (2023). Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel. in Journal of Asian Ceramic Societies
Informa UK Limited., 11(3), 1-8.
https://doi.org/10.1080/21870764.2023.2227535
https://hdl.handle.net/21.15107/rcub_dais_14708

Corlett CA, Obradović N, Watts JL, Bohannan EW, Fahrenholtz WG. Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel. in Journal of Asian Ceramic Societies. 2023;11(3):1-8.
doi:10.1080/21870764.2023.2227535
https://hdl.handle.net/21.15107/rcub_dais_14708 .

Corlett, Cole A., Obradović, Nina, Watts, Jeremy L., Bohannan, Eric W., Fahrenholtz, William G., "Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel" in Journal of Asian Ceramic Societies, 11, no. 3 (2023):1-8,
https://doi.org/10.1080/21870764.2023.2227535 .,
https://hdl.handle.net/21.15107/rcub_dais_14708 .

TY  - JOUR
AU  - Corlett, Cole A.
AU  - Frontzek, Matthias D.
AU  - Obradović, Nina
AU  - Watts, Jeremy L.
AU  - Fahrenholtz, William G.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13516
AB  - The synthesis and crystallographic site occupancy were investigated for MgAl2O4 with and without mechanical activation of the precursor powders. Heating to 1200 °C or higher resulted in the formation of a single spinel phase regardless of whether the powders were mechanically activated or not. Neutron diffraction analysis was used to determine cation site occupancy and revealed that mechanical activation resulted in a lower degree of cation site inversion compared to the nonactivated materials, which indicated that the powders were closer to thermodynamic equilibrium. This is the first study to characterize the effects of mechanical activation on crystallographic site occupancy in magnesium aluminate spinel using neutron diffraction. © 2022 by the authors.
T2  - Materials
T1  - Mechanical Activation and Cation Site Disorder in MgAl2O4
VL  - 15
IS  - 18
DO  - 10.3390/ma15186422
UR  - https://hdl.handle.net/21.15107/rcub_dais_13516
ER  - 

@article{
author = "Corlett, Cole A. and Frontzek, Matthias D. and Obradović, Nina and Watts, Jeremy L. and Fahrenholtz, William G.",
year = "2022",
abstract = "The synthesis and crystallographic site occupancy were investigated for MgAl2O4 with and without mechanical activation of the precursor powders. Heating to 1200 °C or higher resulted in the formation of a single spinel phase regardless of whether the powders were mechanically activated or not. Neutron diffraction analysis was used to determine cation site occupancy and revealed that mechanical activation resulted in a lower degree of cation site inversion compared to the nonactivated materials, which indicated that the powders were closer to thermodynamic equilibrium. This is the first study to characterize the effects of mechanical activation on crystallographic site occupancy in magnesium aluminate spinel using neutron diffraction. © 2022 by the authors.",
journal = "Materials",
title = "Mechanical Activation and Cation Site Disorder in MgAl2O4",
volume = "15",
number = "18",
doi = "10.3390/ma15186422",
url = "https://hdl.handle.net/21.15107/rcub_dais_13516"
}

Corlett, C. A., Frontzek, M. D., Obradović, N., Watts, J. L.,& Fahrenholtz, W. G.. (2022). Mechanical Activation and Cation Site Disorder in MgAl2O4. in Materials, 15(18).
https://doi.org/10.3390/ma15186422
https://hdl.handle.net/21.15107/rcub_dais_13516

Corlett CA, Frontzek MD, Obradović N, Watts JL, Fahrenholtz WG. Mechanical Activation and Cation Site Disorder in MgAl2O4. in Materials. 2022;15(18).
doi:10.3390/ma15186422
https://hdl.handle.net/21.15107/rcub_dais_13516 .

Corlett, Cole A., Frontzek, Matthias D., Obradović, Nina, Watts, Jeremy L., Fahrenholtz, William G., "Mechanical Activation and Cation Site Disorder in MgAl2O4" in Materials, 15, no. 18 (2022),
https://doi.org/10.3390/ma15186422 .,
https://hdl.handle.net/21.15107/rcub_dais_13516 .