@article{Zhang2024, 
author = {Guangheng Zhang and Jinyu Shi and Jie Zhang and Jingyang Wang},
title = {Investigation on crystallization behavior between (ScxYb1−x)O1.5 and CMAS: A new insight in the effect of Sc substitution},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {6},
pages = {789-799},
keywords = {scandium–ytterbium oxide (ScxYb1−x)O1.5 solid solution, calcium–magnesium–aluminum–silicate (CMAS) deposit, crystallization behavior, cation partitioning, pseudoternary phase diagram},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220898},
doi = {10.26599/JAC.2024.9220898},
abstract = {Environmental barrier coatings (EBCs) with thermomechanical robustness against calcium–magnesium–aluminum–silicate (CMAS) deposits are in high demand. The aim of this work was to clarify the influence of Sc3+ on the crystallization behavior of Yb-based coatings against CMAS deposits. The reaction products of solid solutions with compositions traversing the Sc2O3–Yb2O3 system indicate that Sc3+ tends to form [BO6] coordination polyhedra in the crystal structure to promote the formation of garnet and diopside, while Yb3+ occupies 7-, 8-, and 9-coordinate sites to crystallize apatite and silicocarnotite. The transformation of crystalline products from apatite/silicocarnotite to garnet/diopside greatly improves the efficiency of CMAS melt consumption and facilitates the prevention of its further penetration and corrosion. Based on the commonality of cation occupancy in crystallography, an A(CaO+YbO1.5)–B(ScO1.5+MgO+AlO1.5)–T(SiO2) pseudoternary phase diagram is established, which has great potential for describing phase equilibrium in coating-deposit systems and can provide guidance for the compositional design of corrosion-resistant coatings.}
}