Ablation resistance of core-shell ZrC1-xOx@ZrO2/Y2O3/SiC coating in 2700 K oxidizing environment coupled with supersonic gas-solid two-phase flow
Source abstract
Abstract
Existing methods to improve anti-ablation materials for solid-scramjet combustor involve expensive elements, numerous solvents, or complex processes. Through a simple pre-oxidation and a combined coating process, this work developed a core-shell ZrC 1-xO x@ZrO 2/Y 2O 3/SiC coating of asphalt-concrete-like structure, achieving a linear (mass) ablation rate 52 % (57 %) lower than that of C/C-ZrC-SiC composite under simulated test conditions. Underlying protection mechanism was revealed by first-principle calculations. Core-shell ZrC 1-xO x@ZrO 2 could retard oxidation and reserve solid ZrC 1-xO x instead of ZrO 2 to resist scouring at high temperature. The formation of self-sealing Y 4Si 3O 12 alleviated the active oxidation of SiC. Finally, newly-formed asphaltic-concrete-like ZrC 1-xO x/ZrO 2/Y 4Si 3O 12 contributed to enhanced ablation resistance.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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