@article{WANG2022, 
author = {Jun WANG and Xiaoyu CHONG and Jing FENG and Min ZHANG and Yuan YANG and Dongpo LI and Zifan ZHAO},
title = {High-Entropy Ferroelastic Rare-earth Tantalate Thermal Barrier Coating Material: (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4},
year = {2022},
journal = {Journal of the Chinese Ceramic Society},
volume = {50},
number = {6},
pages = {1481-1488},
keywords = {rare earth tantalate ceramics, high entropy ceramics, thermal barrier coating, ferroelastic toughening effect},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20220038},
doi = {10.14062/j.issn.0454-5648.20220038},
abstract = {The function of thermal barrier coating is to protect the hot components of advanced aero-engines from hot corrosion and ensures the hot components service in high-temperature environment safely. In general, a low thermal conductivity and a high fracture toughness are the key performance indexes for the selection of novel thermal barrier coating materials. In this work, a high-entropy rare-earth tantalate ceramic of (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4 (i.e. (5RE0.2)TaO4) with the superior properties was synthesized via solid-state reaction. The results indicate that (5RE0.2)TaO4 exhibits a low thermal conductivity (i.e., 1.68 W·m–1·K–1 @ 900 ℃) and a high thermal expansion coefficient (i.e., 10.0×10–6 K–1 @ 1200 ℃). (5RE0.2)TaO4 shows a high fracture toughness (i.e., 2.6 MPa·m1/2) and a low brittleness index (i.e., 2.1 μm–1/2) because of the unique ferroelastic toughening effect. In addition, (5RE0.2)TaO4 also has a promising application prospect as one of thermal barrier coating materials.}
}