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.
Recommended Citation
C. A. Corlett et al., "Synthesis, Densification, And Cation Inversion In High Entropy (Co,Cu,Mg,Ni,Zn)Al2O4 Spinel," Journal of Asian Ceramic Societies, Taylor and Francis Group; Taylor and Francis, Jan 2023.
The definitive version is available at https://doi.org/10.1080/21870764.2023.2227535
Department(s)
Materials Science and Engineering
Second Department
Chemistry
Publication Status
Open Access
Keywords and Phrases
densification; sintering; spinel; Synthesis
International Standard Serial Number (ISSN)
2187-0764
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, All rights reserved.
Publication Date
01 Jan 2023
