期刊
CORROSION SCIENCE
卷 184, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109385
关键词
Ablation resistance; Multi-cycle and long-term ablation; Ceramic matrix composites; UHTCs
资金
- National Natural Science Foundation of China [51702341]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC031]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) [2021KF5]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University [KF2116]
Research showed that Cf/ZrB2-SiC composite can form a protective oxide layer under high-temperature ablation conditions, but the structural stability of the oxide layer needs optimization to retard the aggregation, growth, and phase transition of ZrO2.
Multi-cycle and long-term ablation behavior of Cf/ZrB2-SiC composite was evaluated by plasma ablation flame at 2500 ?C. The composites can be protected by the oxide layer with uniform distribution of ZrO2 particles in SiO2 melt. However, the structural stability of the oxide layer could be destroyed due to the phase transition of ZrO2 and violent evaporation of SiO2, resulting from the aggregation and growth of ZrO2 during multi-cycle and longterm ablation. It is of great significance to optimize the composition and microstructure of the oxide layer to retard the aggregation, growth and phase transition of ZrO2.
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