TY - JOUR
T1 - Investigation of ultra-high temperature performance of environmental barrier coatings (EBCs) with mullite-Si modified HfSiO4 as bond coating
AU - Liu, Ye
AU - Wen, Jiao
AU - Zhang, Chenyu
AU - Xu, Gaojie
AU - Li, Yuan
AU - Zhou, Qijie
AU - Guo, Qian
AU - Li, Chun
AU - Guo, Hongbo
AU - Gong, Shengkai
N1 - Publisher Copyright:
Copyright © 2025. Published by Elsevier Ltd.
PY - 2026/5
Y1 - 2026/5
N2 - A novel mullite-Si modified HfSiO4 bond coating was proposed, and its performance was evaluated in a bi-layer EBCs system designed for ultra-high temperature applications. The 3 wt% mullite-10 wt% Si modified HfSiO4 (3M10S), which exhibited a thermal expansion coefficient compatible with SiC substrate and excellent oxidation resistance, was selected as bond coating. The bi-layer EBCs of Yb2Si2O7/3M10S prepared by Air Plasma Spraying (APS) exhibited significant stability when exposed to atmosphere at 1450 ℃, and no channel cracks or interfacial spalling were detected after 300 h. At 1500 ℃, though a portion of the coatings peeled off at the 3M10S/SiC interface after 100 h, the Yb2Si2O7/3M10S interface remained intact. Besides, the EBCs demonstrated ultra-high temperature and prolonged stability (1450 ℃ for 100 h) against water vapour corrosion. The mullite-Si modified HfSiO4 coating showed considerable potential for ultra-high temperature EBCs, supporting further exploration and application in extreme service circumstances.
AB - A novel mullite-Si modified HfSiO4 bond coating was proposed, and its performance was evaluated in a bi-layer EBCs system designed for ultra-high temperature applications. The 3 wt% mullite-10 wt% Si modified HfSiO4 (3M10S), which exhibited a thermal expansion coefficient compatible with SiC substrate and excellent oxidation resistance, was selected as bond coating. The bi-layer EBCs of Yb2Si2O7/3M10S prepared by Air Plasma Spraying (APS) exhibited significant stability when exposed to atmosphere at 1450 ℃, and no channel cracks or interfacial spalling were detected after 300 h. At 1500 ℃, though a portion of the coatings peeled off at the 3M10S/SiC interface after 100 h, the Yb2Si2O7/3M10S interface remained intact. Besides, the EBCs demonstrated ultra-high temperature and prolonged stability (1450 ℃ for 100 h) against water vapour corrosion. The mullite-Si modified HfSiO4 coating showed considerable potential for ultra-high temperature EBCs, supporting further exploration and application in extreme service circumstances.
KW - Environmental barrier coatings (EBCs)
KW - Mullite-Si modified HfSiO
KW - Ultra-high temperature oxidation resistance
KW - Water vapour corrosion
UR - https://www.scopus.com/pages/publications/105022251381
U2 - 10.1016/j.jeurceramsoc.2025.117951
DO - 10.1016/j.jeurceramsoc.2025.117951
M3 - 文章
AN - SCOPUS:105022251381
SN - 0955-2219
VL - 46
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 5
M1 - 117951
ER -