@article{Xue2025, 
author = {Guiyu Xue and Lin Chen and Luyang Zhang and Jiankun Wang and Jing Feng},
title = {Typical structures and thermal expansion coefficients of ABO4-type (A=Ga, In, Cr; B=Nb, Ta) oxides as EBC candidates},
year = {2025},
journal = {Extreme Materials},
volume = {1},
number = {1},
pages = {1-8},
keywords = {Environmental barrier coatings, Thermal stress, Thermal expansion coefficients, Distortion degree},
url = {https://www.sciopen.com/article/10.1016/j.exm.2024.12.002},
doi = {10.1016/j.exm.2024.12.002},
abstract = {It is of great significance to search oxide thermal/environmental barrier coatings (T/EBCs) with high working temperatures and thermal expansion coefficients (TECs) matching to different substrates. ABO4-type oxides have been widely studied due to their high working temperatures, adjustable TECs, and low thermal conductivity. In this work, ABO4-type (A=Ga, In, Cr; B=Nb, Ta) oxides are studied as EBC candidates based on their relatively low TECs. The influences of crystal structures, distortion degree, types of polyhedrons, as well as the A- and B-site ionic radii and atomic weights on TECs are discussed. It is found out that the TECs of ABO4-type oxides are not depended on one single factor, and reducing A-site ionic radius may be a good way to decrease their TECs. Based on the TECs, AlNbO4, InNbO4, and GaTaO4 are chosen as EBCs for C-, SiC-, and Al2O3-based substrates, respectively. The similar TECs between ABO4-type oxide EBCs and substrates are beneficial for reducing interfacial thermal stress, which is good for their long-term applications. This work shows that the applications of ABO4-type oxides can be expanded by effectively regulating TECs.}
}