Abstract
Improving the long time ablation resistance of thermal protective coating is the key index to promote the development of hypervelocity aerocrafts. In this work, the ablation behaviors of ZrB2-MoSi2 and ZrB2-MoSi2-WB composite coatings fabricated by vacuum plasma spray (VPS) were evaluated by plasma flame. The microstructure evolution induced by prolonged ablation was focused on and discussed in detail. The results shows that the addition of WB significantly improved the long-term ablation resistant performance of the ZrB2-MoSi2 coating, as characterized by integrated macrostructure, compact microstructure and decreased thickness of oxide layer. The function of WB was explained in detail based on microstructure observation and thermodynamic calculations, which would give some inspirations for the design of UHTCs.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
