Abstract
A non-destructive inspection technique known as photoluminescence piezospectroscopy (PLPS) has been used to measure residual stresses in thermally grown oxide layers in TBCs subjected to thermal cycling at 1121 °C. YSZ topcoats were applied by atmospheric plasma spraying on cold-sprayed bond-coated Ni superalloy substrates. Residual stresses were analyzed as a function of thermal exposure. Changes in stress were used to indicate spallation and damage degree in the coating system.
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2016
DVS Media GmbH
Issue Section:
Properties, Characterization, and Testing
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