Research Progress on Carbide Ultra-high Temperature Ceramic Anti-ablation Coatings for Thermal Protection System
Source abstract
Abstract
Carbide ultra-high temperature ceramics (UHTCs) have emerged as ideal coating materials for the thermal protection systems of hypersonic vehicles due to their high melting point (>3000 ), high hardness, low thermal conductivity, excellent heat resistance, and good chemical stability.This review provides a comprehensive overview of structure and properties of carbide UHTCs, namely TiC, ZrC, HfC, NbC, and TaC.Furthermore, it summarizes recent developments in preparation of carbide UHTC coatings using various methods, including chemical vapor deposition, plasma spraying, and solid-phase reaction.Effects of coating microstructure, composition, structural design, and heat flux on the ablation behavior are analyzed.Data from recent literature corroborate that the added second phase canfacilitate formation of complex oxides, generate an oxidation layer during ablation to undergo moderate sintering, protect structural integrity, and enhance oxygen barrier properties.Multi-layer structural designs utilize gradient layering and multi-functional structures, which effectively alleviate thermal stress within the coating, suppress crack propagation, and facilitate synergistic enhancing effects among different layers.Finally, the challenges and opportunities in development of carbide UHTC anti-ablation coatings are prospected.
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OpenAlex topics: Advanced ceramic materials synthesis
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References (100+)
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