Journal
CORROSION SCIENCE
Volume 167, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108536
Keywords
Coating; Oxidation; Carbon/carbon composites; 1973 K
Funding
- National Natural Science Foundation of China [91860203, 91860118, 51672223]
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CrSi2-HfB2-SiC outer coatings were prepared on SiC coated C/C by in-situ reaction. The isothermal oxidation test at 1973 K and oxyacetylene flame ablation test were carried out to investigate oxidation and ablation resistance of the CrSi2-HfB2-SiC/SiC coated C/C samples, respectively. The coating with 15 wt.% Cr protected C/C for 415 h at 1973 K with a mass loss of 1.6 %. After ablation for 90 s, the coating was still intact, with slight increase in thickness and a mass ablation rate of only 4.56 x 10(-5) g/s. The Cr-Si-O and Hf-Si-O glasses have good stability and excellent oxidation and ablation protection.
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