Thermal Barrier Coatings
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 9426
Special Issue Editor
Interests: coatings; superalloys; steels; ceramics; high temperature; oxidation; corrosion; metallurgy; chemistry of materials
Special Issue Information
Dear colleagues,
Thermal barrier coatings (TBCs) are compulsorily applied on components operating at temperatures over or close to their melting temperatures. The thermal insulation provided by TBCs to the parts allow both to maintain their mechanical properties and to limit access of the aggressive environments to the metal substrates. Over the last decades, many different materials –mostly ceramics- have been fabricated through different methods including physical (PVD), chemical (CVD), thermal (thermal spray) and more recently, wet (slurry, sol-gel) methods. For the same type of ceramic material, the resulting properties can be quite different depending on such methods. An adequate balance between thermal insulation, mechanical properties and durability is often difficult to find though quite robust TBCs are operating today.
However, the increased operating temperatures of thermal power engines in the energy and transport systems requires further investigations of more advanced and exotic TBC systems that include new compositions, microstructures, and multilayering, among others. Such new TBCs will respond to the appearance of new degradation phenomena, including CMAS, more corrosive environments, greater loading mechanical cycles, and more erosive environments, in many practical applications. Further, sensor coatings allow one to facilitate quality control and the maintenance operations of the coatings. One key aspect is the use of adequate characterization techniques to evaluate accurately the TBCs.
This Special Issue on thermal barrier coatings covers aspects that include fabrication methods; conventional and new insulating materials (including sensor coatings); and derived thermal, mechanical, and corrosion-related properties. Contributions that provide an accurate characterization of TBCs are also welcome.
Prof. Fernando Pedraza
Guest Editor
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Keywords
- thermal barrier coatings (compositions, microstructures, crystal phases, sensor, and multilayers)
- coating methods
- thermal insulation
- mechanical properties
- corrosion and oxidation
- sensor capabilities
- characterization methods
- maintenance
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