Abstract
In order to further improve the oxidation protective ability of (ZrB2–SiC)/SiC coated graphite, ferrocene was introduced into the outer ZrB2–SiC coatings during pack cementation process. The ferrocene addition increased the porosity of the outer ZrB2–SiC coatings, which was favorable to thermal shock resistance of (ZrB2–SiC)/SiC coated specimens. The ZrB2–SiC coating with 3wt% ferrocene (ZS50-3f) has optimum oxidation protective ability. Its weight retention after 15 thermal shock cycles between 1500°C and room temperature was 96. 2%. The weight loss of ZS50-3f was only 0.2% after 19h oxidation at 1500°C.
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