A MoSi2-SiOC-Si3N4/SiC anti-oxidation coating for C/C composites prepared at relatively low temperature
Source abstract
Abstract
Abstract In this study, SiC coating for C/C composites was prepared by pack cementation method at 1773 K, and MoSi 2 -SiOC-Si 3 N 4 as an outer coating was successfully fabricated on the SiC coated samples by slurry method at 1273 K. The microstructure and phase composition of the coatings were analyzed. Results showed that a porous β-SiC inner coating and a crack-free MoSi 2 -SiOC-Si 3 N 4 coating are formed. Effect of Si 3 N 4 content on the oxidation resistance of the coated C/C composites at 1773 K in air was also investigated. The weight loss curves revealed that introducing the appropriate proportion of Si 3 N 4 could improve the oxidation resistance of coating. The MoSi 2 -SiOC/SiC coated C/C sample had an accelerated weight loss after oxidation in air for 20 h. However, the coating containing 45% Si 3 N 4 could protect C/C composition from oxidation for 100 h with a minute weight loss of 0.63%.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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