期刊
CORROSION SCIENCE
卷 191, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109736
关键词
C/C-ZrC composites; Gradient ablation; Flexural strength
资金
- National Natural Science Founda-tion of China [51821091, 51727804, 51872239, 52002321]
- Fundamental Research Funds for the Central Uni-versities [G2020KY05125]
A new ablation condition was designed to investigate the effect of temperature gradient on the ablation and flexural behavior of C/C-ZrC composites. The volume change caused by ZrC -> ZrO2 and the ZrO2 crystalline transformation were beneficial for releasing internal stress, thereby contributing to the higher flexural strength retention of the composites.
A new ablation condition was designed to investigate the effect of temperature gradient on the ablation and flexural behavior of the C/C-ZrC composites. The sample not only suffers the gradient temperature ablation ranging from 1000 to 2000 degrees C but withstands flexural load caused by the high-speed airflow scouring. The volume ablation rate of the C/C-ZrC was 0.06 mm(3)/s, which was only 6.81 % of the rate of the C/C. The volume change caused by ZrC -> ZrO2 together with the ZrO2 crystalline transformation was beneficial for releasing internal stress, thereby contributing to the higher flexural strength retention of the C/C-ZrC composites.
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