Journal
CORROSION SCIENCE
Volume 190, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109648
Keywords
CLVD process; Preform density; C; C-ZrC-SiC; Microstructure; Ablation resistance
Funding
- National Natural Science Foundation of China [51821091]
- Research Foundation of Chengdu University of Technology [10912-KYQD2020 08264]
- New Style Think Tank of Shaanxi Univer-sities (Research Center for Auxiliary Chemistry and New Materials Development, Shaanxi University of Science and Technology) [ACNM202106]
- Sichuan Science and Technology Program [2021JDRC0099]
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The study focused on the effects of preform density on the microstructure and ablation behavior of CLVD-C/C-ZrC-SiC composites. Results showed that composites prepared from preforms with a density of 0.91 g/cm(3) exhibited dense microstructure and proper ceramic content, leading to excellent ablation resistance attributed to the formation of a uniform and continuous protective layer of ZrO2-SiO2.
In chemical liquid vapor deposition (CLVD) technique, carbon preform density is a crucial factor to control the microstructure of C/C-ZrC-SiC composites, which also determines the ablation resistance. The effects of preform density on the microstructure and ablation behavior of CLVD-C/C-ZrC-SiC composites were studied. Results demonstrated the composites prepared from the preform with a density of 0.91 g/cm(3) showed a dense microstructure and proper ceramic content. Under an oxyacetylene flame, the composites displayed an excellent ablation resistance. The good ablation resistance was ascribed to the proper preform density, which promoted the formation of uniform and continuous protective layer of ZrO2-SiO2.
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