Collaborative Research on Adhesion Strength of Thermal Barrier Coatings in JSMS

Masakazu OKAZAKI; Yasuhiro YAMAZAKI; Kouichi NAMBA; Kazuhiro OGAWA; Motofumi OHKI; Kazunari FUJIYAMA; Hiroyuki WAKI; Masayuki ARAI; Masaru SEKIHARA; Akihiro ITOH; Hirotaka FUKANUMA; Naoyuki OHNO; Hideaki KANEKO; Masashi KAWAMURA

doi:10.1299/jmmp.4.252

Papers

Collaborative Research on Adhesion Strength of Thermal Barrier Coatings in JSMS

Masakazu OKAZAKI, Yasuhiro YAMAZAKI, Kouichi NAMBA, Kazuhiro OGAWA, Motofumi OHKI, Kazunari FUJIYAMA, Hiroyuki WAKI, Masayuki ARAI, Masaru SEKIHARA, Akihiro ITOH, Hirotaka FUKANUMA, Naoyuki OHNO, Hideaki KANEKO, Masashi KAWAMURA

Author information

Masakazu OKAZAKI
Department of Mechanical Engineering, Nagaoka University of Technology
Yasuhiro YAMAZAKI
Department of Mechanical and Control Engineering, Niigata Institute of Technology
Kouichi NAMBA
Machinery & Systems Hq., Mitsui Engineering & Shipbuilding Co., Ltd.
Kazuhiro OGAWA
Fracture and Reliability Research Institute, Tohoku University
Motofumi OHKI
Department of Materials Science and Technology, Faculty of Engineering, Niigata University
Kazunari FUJIYAMA
Department of Mechanical Engineering, Faculty of Science and Technology, Meijo University
Hiroyuki WAKI
Department of Mechanical Engineering, Osaka Electro-Communication University
Masayuki ARAI
Materials Science Research Laboratory, Central Research Institute of Electric Power Industry
Masaru SEKIHARA
Materials Research Laboratory, Hitachi, Ltd.
Akihiro ITOH
Electric Power R&D Center, Chubu Electric Power Co., Inc.
Hirotaka FUKANUMA
Representative Director, Plasma Giken, Co. Ltd
Naoyuki OHNO
Engineering Department, Plasma Giken, Co. Ltd
Hideaki KANEKO
Material & Strength Laboratory, TAKASAGO Research & Development Center, Mitsubishi Heavy Industries, Ltd.
Masashi KAWAMURA
Material Research Department, Technical Institute, Kawasaki Heavy Industries, Ltd.

Keywords: Thermal Barrier Coatings (TBCs), Elastic Modulus, Tensile Strength, Thermal Conductivity, Sintering, Residual Stress, Thermally Grown Oxide (TGO), Adhesion Strength, Isothermal Exposure, Thermal Cycling

JOURNAL FREE ACCESS

2010 Volume 4 Issue 2 Pages 252-263

DOI https://doi.org/10.1299/jmmp.4.252

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Abstract

This paper introduces the brief summary of the recent collaboration test results on thermal barrier coatings (TBCs) in the JSMS Subcommittee, which covers the measurements of elastic modulus, tensile strength, residual stress and thermal conductivity of the TBC specimens. Here, the round-robin TBC specimens consisting of 8% yttria stabilized zirconia, CoNiCrAlY alloy bond coat and Ni-base superalloy were prepared by plasma spraying method. The isothermal exposure and the thermal cycles were applied to the TBC specimens by several conditions at high temperatures, to measure both the residual stress and the remaining adhesion strength of the ceramic top, as well as to characterize the thermally grown oxide at the top coat/bond coat interface. The round-robin test results clearly demonstrated that the adhesion strength was significantly changed by the application of thermal cycles and the isothermal exposure. Of particular important results was found in the remaining adhesion strength that were strongly dependent on the testing method to give the thermal cycles.

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