Abstract
Plasma sprayed coatings are widely used to protect parts from aggressive environments. In applications such as land-based gas turbines, Thermal barrier Coatings (TBCs) are utilized to protect the turbine components from very high operating or firing temperatures [1]. The TBCs are commonly applied by standard air plasma spray process, which is an open-loop operation with no feedback about the coating conditions during deposition. Unfortunately, on-line variations of the spray conditions, such as the continuous wearing of the torch hardware, can adversely affect the coating quality and create significant part-to-part variations. The standard method of evaluating coatings is destructive in nature; hence these tests cannot be performed on each produced part [2]. As a result, coated parts may not have the consistent quality and durability needed for many applications [3].
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Abbate, A., Russell, W., Goldman, J., Kotidis, P., Berndt, C.C. (1999). Nondestructive Determination of Thickness and Elastic Modulus of Plasma Spray Coatings Using Laser Ultrasonics. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Review of Progress in Quantitative Nondestructive Evaluation, vol 18 A. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4791-4_46
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DOI: https://doi.org/10.1007/978-1-4615-4791-4_46
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