しゃ熱コーティング膜の新密着強度評価手法(<小特集>ガスタービン用遮熱/耐環境コーティング技術)

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  • A New Testing Method to Evaluate Adhesion Strength of Ceramic Top Coat in TBCs(<Special Issue>Thermal Barrier Coating Systems for Gas Turbines)
  • しゃ熱コーティング膜の新密着強度評価手法
  • シャネツ コーティング マク ノ シン ミッチャク キョウド ヒョウカ シュホウ

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A new testing method to evaluate adhesion strength of ceramic top coat has been proposed, employing a ring shape of TBC specimen specifically designed. It was shown by the experiments that a delamination behavior of the top coat was successfully reproduced in the proposed method, associating with a buckling mode; a similar mode frequently observed in actual gas turbine components. A method to quantitatively evaluate a resistance to delamination was also introduced, based on an energy release rate criterion. The experiments demonstrated that the testing method provided reasonable adhesion strength in terms of energy criterion, that almost agreed with the values measured by other researchers employing different type of testing method. It was also shown that the present method has many advantages, compared with the traditional methods.

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