TY - JOUR
T1 - Effect of the Y2O3 amount on the oxidation behavior of ZrB2-SiC-based coatings for carbon/carbon composites
AU - Lin, Hao
AU - Liu, Yangyang
AU - Liang, Wenping
AU - Miao, Qiang
AU - Zhou, Shaoyun
AU - Sun, Jiayu
AU - Qi, Yan
AU - Gao, Xiguang
AU - Song, Yingdong
AU - Ogawa, Kazuhiro
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 51874185 ), the program of China Scholarships Council (No. 202006830091 ), the Foundation of the Graduate Innovation Center, Nanjing University of Aeronautics and Astronautics (No. kfjj20200606 ), the National Major Science and Technology Projects of China ( 2017-IV-00–05-0042 ), and the Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology (Grant No. ASMA202003 ). Meanwhile, special thanks are given to Dr. Takamichi Miyazaki for his support in conducting the TEM experiment.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9
Y1 - 2022/9
N2 - In this paper, the effect of Y2O3 addition on the oxidation resistance of ZrB2-SiC-Y2O3 coating for the SiC coated carbon/carbon composites was investigated. Results confirmed the great benefits of adding Y2O3 to the oxidation-resistant properties of the original coating from different aspects. The dense structure of surface and cross-section and formation of yttria stabilized zirconia, Y2Si2O7, t-ZrO2 phases were observed after adding Y2O3. Additionally, according to the TEM results, yttrium silicate existed in the form of nanoparticles, while yttria stabilized zirconia existed in the form of agglomeration within the SiO2 liquid phase. This superior oxidation resistance was attributed to the following reasons: (i) the formed Zr-Si-Y-O glass barrier layer blocked the oxygen diffusion and healed the cracks; (ii) the reduced m-ZrO2 content weakened the volume expansion of the coating and avoided spallation; (iii) Y2Si2O7 served as a pinning phase which modified the stability of liquid SiO2 at elevated temperatures.
AB - In this paper, the effect of Y2O3 addition on the oxidation resistance of ZrB2-SiC-Y2O3 coating for the SiC coated carbon/carbon composites was investigated. Results confirmed the great benefits of adding Y2O3 to the oxidation-resistant properties of the original coating from different aspects. The dense structure of surface and cross-section and formation of yttria stabilized zirconia, Y2Si2O7, t-ZrO2 phases were observed after adding Y2O3. Additionally, according to the TEM results, yttrium silicate existed in the form of nanoparticles, while yttria stabilized zirconia existed in the form of agglomeration within the SiO2 liquid phase. This superior oxidation resistance was attributed to the following reasons: (i) the formed Zr-Si-Y-O glass barrier layer blocked the oxygen diffusion and healed the cracks; (ii) the reduced m-ZrO2 content weakened the volume expansion of the coating and avoided spallation; (iii) Y2Si2O7 served as a pinning phase which modified the stability of liquid SiO2 at elevated temperatures.
KW - Carbon/carbon composites
KW - Mechanism
KW - Oxidation resistance
KW - Ultra-high temperature ceramics
KW - YO modified ZrB-SiC
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U2 - 10.1016/j.jeurceramsoc.2022.05.006
DO - 10.1016/j.jeurceramsoc.2022.05.006
M3 - Article
AN - SCOPUS:85129721043
SN - 0955-2219
VL - 42
SP - 4770
EP - 4782
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -