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TBC materials in the hot components of a gas turbine are exposed to extremely harsh environments. Therefore, the evaluation of various environmental factors in applying new TBCs is essential. Understanding the mechanisms for degradation which occur in comprehensive environments plays an important role in preventing it and improving the lifetime performance. The development of novel coating techniques can also have a significant impact on lifetime performance as they can alter the microstructure of the coating and alter the various properties resulting from it. This Special Issue presents an original research paper that reports the development of novel TBCs, particularly the application of advanced deposition techniques and novel materials.

degradation --- high mechanical fatigue --- hot gas path components --- gas turbine lifetime --- gas turbine blade --- ANNs --- passive methods --- building energy --- internal covering --- thermal barrier coating (TBC) --- BaLa2Ti3O10 --- molten salt corrosion --- corrosion mechanisms --- crack healing --- encapsulation --- healing agent --- thermal barrier coating --- thermal durability --- cyclic thermal fatigue --- crack growth --- initial crack length --- failure --- hydrogenated amorphous silicon films --- high temperature oxidation --- super-low friction --- plasma spray–physical vapor deposition --- thermal stability --- thermal barrier coatings --- bond coat species --- electron beam-physical vapor deposition --- cyclic thermal exposure --- plasma spraying --- SrZrO3 --- TBC --- CMAS --- luminescence --- high temperature wear behavior --- dry sliding wear --- CoNiCrAlY --- detonation gun (D-gun) --- supersonic plasma spraying (SSPS)