Plasma spray deposition of tri-layer environmental barrier coatings

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Fracture mechanisms of ytterbium monosilicate environmental barrier coatings during cyclic thermal exposure (2016, background): “It is noted that the low power EBCs of the present study have a higher density (particularly in the Si bond coat) and a thicker Yb2SiO5 layer than for those previously studied [26,27,33].”
Response of ytterbium disilicate–silicon environmental barrier coatings to thermal cycling in water vapor (2016, background): “The environmental stability, CTE, and elastic modulus of many candidate EBC materials have been reviewed [1,30,34,53].”
A review on environmental barrier coatings: History, current state of the art and future developments (2020, background): “[53,54] on the deposition of rare earth silicates top coat +mullite diffusion barrier + Si bond coat using plasma spraying (APS) and the study of the characteristics of the deposited coatings before and after thermal cycling in water environment, provided great insights into the failure mechanisms [”
Structure, composition, and defect control during plasma spray deposition of ytterbium silicate coatings (2015, background): “significant sensitivity of the coating’s steam cycling durability to the composition, structure, and various defects incorporated into the layers during APS deposition [28, 29].”