Journal
COMPOSITES PART B-ENGINEERING
Volume 69, Issue -, Pages 127-132Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.10.033
Keywords
Ceramic matrix composites (CMCs); Corrosion; High-temperature properties; Chemical vapor deposition (CVD); Molten salt
Funding
- National Natural Science Foundation of China [90916002]
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To improve the ablation resistance of PIP-C/SiC composites, SiC/Zr-Si-C multilayer coating was prepared by chemical vapor deposition (CVD) using methyltrichlorosilane (MTS) and hydrogen as the precursors and molten salt reaction using KCl-NaCl, sponge Zr and K2ZrF6, then the ablation capability of the coated composites was tested under oxyacetylene torch flame. The linear and mass ablation rates were much lower than those of uncoated samples. The linear and mass ablation rates of the three coating coated samples reached 0.0452 mm/s and 0.031 g/s, decreased by 27.3% and 27.1%, respectively. Moreover, the linear and mass ablation rates of the five coating coated samples reached 0.0255 mm/s and 0.0274 g/s, decreased by 59.0% and 35.5%. The gases released during ablation could take away a lot of heat, which was also helpful to the protection of the composites. (C) 2013 Elsevier Ltd. All rights reserved.
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