TY - JOUR
T1 - Ablation-resistant Ta0.78Hf0.22C solid solution ceramic modified C/C composites for oxidizing environments over 2200 °C
AU - Zhang, Yulei
AU - Shao, Danyu
AU - Feng, Guanghui
AU - Fu, Yanqin
AU - Li, Jie
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - Ta0.78Hf0.22C solid solution ceramic was synthesized and introduced into carbon/carbon (C/C) composites by polymer infiltration and pyrolysis (PIP). Effect of the introduction of Ta0.78Hf0.22C on the microstructure, ablation resistance, and flexural performance of C/C composites were investigated. Results showed that the flexural strength and modulus of the composites were increased by 108 % and 117 %, respectively, after adding Ta0.78Hf0.22C solid solution into C/C composites. In addition, the introduction of Ta0.78Hf0.22C improved the ablation resistance of C/C composites under oxyacetylene ablation environment, over 2200 °C. The linear and mass ablation rates were decreased 73 % and 70 %, respectively. The oxide with low melting point, Ta2O5, exhibited good sealing and oxygen-barrier capacity, and the formation of new solid solution oxide particles, Hf6Ta2O17, could pin cracks during ablation, both of them were contributed to better ablation resistance of modified C/C composites.
AB - Ta0.78Hf0.22C solid solution ceramic was synthesized and introduced into carbon/carbon (C/C) composites by polymer infiltration and pyrolysis (PIP). Effect of the introduction of Ta0.78Hf0.22C on the microstructure, ablation resistance, and flexural performance of C/C composites were investigated. Results showed that the flexural strength and modulus of the composites were increased by 108 % and 117 %, respectively, after adding Ta0.78Hf0.22C solid solution into C/C composites. In addition, the introduction of Ta0.78Hf0.22C improved the ablation resistance of C/C composites under oxyacetylene ablation environment, over 2200 °C. The linear and mass ablation rates were decreased 73 % and 70 %, respectively. The oxide with low melting point, Ta2O5, exhibited good sealing and oxygen-barrier capacity, and the formation of new solid solution oxide particles, Hf6Ta2O17, could pin cracks during ablation, both of them were contributed to better ablation resistance of modified C/C composites.
KW - Ablation resistance
KW - Carbon/carbon composites
KW - Flexural property
KW - Polymer infiltration and pyrolysis
KW - TaHfC ceramic
UR - http://www.scopus.com/inward/record.url?scp=85108958751&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2021.06.031
DO - 10.1016/j.jeurceramsoc.2021.06.031
M3 - 文章
AN - SCOPUS:85108958751
SN - 0955-2219
VL - 41
SP - 6181
EP - 6188
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 13
ER -