Research Progress on Ultra-high Temperature Ceramic Composites
In response to the evolving landscape of high-speed aircraft,characterized by an expansive airspace,prolonged flight durations,and increased velocities,the thermal protection requirements for key structures such as the nose cone,leading edge,and engine combustion chamber have become more exacting.This necessitates a concerted focus on the development of high-performance thermal protection materials capable of withstanding extreme conditions.Ultra-high temperature ceramic composites have emerged as noteworthy candidates,showcasing exceptional oxidation and ablation resistance.Despite their commendable properties,the inherent brittleness of these composites poses a significant obstacle to widespread engineering applications.To address this limitation,there is a growing emphasis on toughening through structural modulation.Simultaneously,the imperative to enhance aircraft payload capacity underscores the demand for lightweight ultra-high temperature ceramic composites.This paper provides a systematic overview of the major research advances made in recent years on ultra-high temperature ceramic composites,including preparation methods such as pressure sintering,slurry infiltration,precursor impregnation and pyrolysis,reactive melt infiltration,chemical vapor infiltration/deposition,and"solid-liquid"combination process,toughening methods such as particles,whiskers,soft-phase materials,short-cut fibers,and continuous fibers,as well as oxidation ablation resistant properities and mechanisms,and lightweighting design.The relationship between the components,microstructures and properties of ultra-high temperature ceramic composites is discussed in depth,and the current challenges as well as the future development trends of ultra-high temperature ceramic composites are presented.
ultra-high temperature ceramiccompositetougheningoxidation ablation resistancelightweightreview
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