A review on development and application of self-healing thermal barrier composite coatings

Abstract

To improve the hot section metallic parts durability in advanced gas-turbine operating in power generation and aircraft, thermal barrier coating (TBCs) are extensively utilized to increase their lifetime. The reason for applying coatings on these components is the improvement of their physical properties, mechanical properties, and outer look. The self-repairing ability of materials is very promising due to expanding the service time of materials and it is also beneficial in terms of human safety and financial aspects. In this review article, structure, properties, limitations, and the modification approaches of TBCs were studied. In addition, self-healing agents for TBCs including SiC, MoSi 2 , TiC were introduced, which release their oxide by reaction with air and O 2 that are able to heal the pores/cracks in the coatings. In this regard, their coating methods, mechanism, and applications in TBCs were reviewed.

A comprehensive review of modern engineered ceramics coatings for optimised resistance to wear and corrosion

“…Other multi-functional materials considerations to develop smarter ceramic barrier coatings include enhanced emissive cooling, self-healing properties, extreme radiation resistance, multilayered plasmonic superlattices and piezoelectric/ferroelastic properties for direct sensing and actuation capabilities [118][119][120][121][122][123][124][125][126][127][128]. Lastly, future developments of repairable ceramic coatings in the field without removal or disassembly are highly desirable and may be achieved with novel cold-spray or sol-gel based composite approaches [129][130][131][132][133][134][135].…”

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

“…Today, various types of ZnO nanostructures like nanorings, nanoparticles, nanotubes, and nanorods are well known. Bioimaging use of ZnO-NPs is interesting for scientists [125][126][127][128]. For example, bright ZnO-NPs can have well photophysical features [125].…”

Influence of polycarbosilane composition on the properties of SiC/SiC composite fabricated by precursor infiltration and pyrolysis process

“…While the highest application temperature for superalloys is limited to 1100 • C, the theoretical upper service temperature for SiC/SiC composites can exceed 1500 • C. 3,9,10 In partic-ular, the development and use of near-stoichiometric ratio SiC fibers reinforced SiC matrix composites in aerospace thermal structural materials can increase engine service temperatures and reduce the need for complex cooling systems. 11,12 Additionally, the application of SiC/SiC composites can effectively reduce weight and enhance engine thrust-to-weight ratios. As a result, SiC/SiC composites have become the preferred alternative to superalloys for high-thrust-to-weight ratio aero-engine hot-end components.…”