テラヘルツ波を用いた遮熱コーティングの表面粗さ測定

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: 2017/03/01

タイトル(英語): Surface Roughness Measurement of Thermal Barrier Coating using Terahertz Waves

著者名: 福地　哲生（（一財）電力中央研究所　電力技術研究所），布施　則一（（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），水野　麻弥（（独）情報通信研究機構　電磁波計測研究所），福永　香（（独）情報通信研究機構　電磁波計測研究所）

著者名(英語): Tetsuo Fukuchi (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Norikazu Fuse (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Mitsutoshi Okada (Energy Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Tomoharu Fujii (Energy Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Maya Mizuno (Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Kaori Fukunaga (Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology)

キーワード: テラヘルツ波，表面粗さ，非破壊検査，実効反射率，遮熱コーティング，トップコート　　terahertz wave，surface roughness，nondestructive testing，effective reflectivity，thermal barrier coating，topcoat

要約(英語): Thermal barrier coating (TBC) is applied to high temperature conditions in gas turbines, such as rotor blades and combustors, to protect the metal substrate surface against hot gas flow. The surface roughness of TBC is reported to affect the heat transfer coefficient, so surface roughness measurement is necessary for improving the thermal analysis of TBS. In this report, terahertz waves were used to measure the surface roughness of TBC specimens. An analytical one-dimensional model based on time of flight was constructed to confirm that the reflection characteristics of a terahertz wave pulse generated by a photoconductive antenna obey the Debye-Waller factor. The surface roughness of five TBC specimens fabricated by the same process was measured to be 16±2μm, which was in agreement with the microscopic observation result of the surface profile of a TBC specimen fabricated in the same lot. These results showed that terahertz waves are effective for measuring the surface roughness of TBC.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.3 （2017）

本誌掲載ページ: 147-152 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/137/3/137_147/_article/-char/ja/