Heat-resistant coatings on CCCM for aerospace applications

Abstract

Slip coatings of ZrB2‒MoSi2‒SiC system on CCCM of the next compostions, wt. %: 55 ZrB2 + 25 MoSi2 + 20 SiC (ZSM25), 50 ZrB2 + 30 MoSi2 + 20 SiC (ZSM30) and 45 ZrB2 + 35 MoSi2 + 20 SiC (ZSM35) are discussed in the article. The modes of the coatings’ heat treatment were worked out and the optimal method for producing heat-resistant coatings was selected. It was found that the coating of composition 1 satisfies the heat resistance assessment tests conditions on the Multiplas 2500-m plasmatron, presumably working due to the formation of a highly viscous ZrSiO4 film.