遮熱コーティングの界面酸化層検出におけるトップコート透過率測定と感度評価

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2015/04/01

タイトル(英語): Topcoat Transmission Measurement and Sensitivity Evaluation for Detection of Thermally Grown Oxide Layer of Thermal Barrier Coating

著者名: 福地　哲生（（一財）電力中央研究所 電力技術研究所），江藤　修三（（一財）電力中央研究所 電力技術研究所），岡田　満利（（一財）電力中央研究所 エネルギー技術研究所），藤井　智晴（（一財）電力中央研究所 エネルギー技術研究所）

著者名(英語): Tetsuo Fukuchi (Electrical Power Engineering Research Laboratory, Central Research Institute of Electrical Power Industry), Shuzo Eto (Electrical Power Engineering Research Laboratory, Central Research Institute of Electrical Power Industry), Mitsutoshi Okada (Energy Engineering Research Laboratory, Central Research Institute of Electrical Power Industry), Tomoharu Fujii (Energy Engineering Research Laboratory, Central Research Institute of Electrical Power Industry)

キーワード: 遮熱コーティング，トップコート，透過率，界面酸化層，光ルミネッセンス，クロムイオン　　thermal barrier coating，topcoat，transmittance，thermally grown oxide，photoluminescence，Cr3+ ion

要約(英語): The thermally grown oxide (TGO) layer, which forms below the topcoat of thermal barrier coating (TBC), is an important factor which causes topcoat delamination, and its detection is important for health monitoring of TBC. Photoluminescence detects the emission from Cr3+ in the TGO layer upon laser excitation, and is an effective, nondestructive method to detect the TGO layer. In this method, the laser light and Cr3+ photoluminescence must transmit through the topcoat, so the topcoat transmittance is a limiting factor of the measurement sensitivity. In this report, the topcoat transmittance was measured by comparing the photoluminescence intensities from the TGO layer in the presence and absence of the topcoat. The round-trip transmittance of the topcoat of thickness 300 µm was 1.26 %, corresponding to an attenuation coefficient of 7.3 mm-1. The sensitivity of the luminescence measurement was evaluated by placing ND filters of known attenuation in front of the TGO layer, to simulate attenuation for different topcoat thickness. The results showed that luminescence measurement is possible for a maximum topcoat thickness of about 700 µm. A method to adjust the photoluminescence intensity for different topcoat thickness is presented.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.135 No.4 （2015） 特集：平成26年基礎・材料・共通部門大会

本誌掲載ページ: 191-197 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/135/4/135_191/_article/-char/ja/