Aging effect for interfacial fracture toughness of thermal barrier coating

• Autorzy: Kishimoto K. , Arai M. , Okajima Y.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

Thermal barrier coating (TBC) is being applied to blade and stator in a land-based gas turbine to protect these hot parts from a high-temperature gas environment. The interfacial cohesive strength of TBC coated components is diminished by a long-term experience under a high-temperature, because of forming a thermal oxidation at the coating interface or a microstructure in the ceramic coating layer being changed gradually. Consequently, it is quite important to understand how the interfacial strength of TBC changes with an exposed condition. This paper presents some experimental results for the interfacial fracture toughness of TBC coated material measured using the biaxial interfacial fracture test device developed by our group. A formation of the interfacial oxidation and an aspect of the interfacial fracture are related to change of the fracture toughness with an aging condition.

Słowa kluczowe

EN

thermal barrier coating; fracture

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 13--20
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Kishimoto K.

• Tokyo Institute of Technology

autor

Arai M.

• Tokyo Institute of Technology

autor

Okajima Y.

• Tokyo Institute of Technology

Bibliografia

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• [3] ARAI M., IWATA U., SAKUMA T., SAlTOH M.: Effect of thermal aging on a delamination strength between thermal barrier coating and substrate, J. of Soc. of Mat. Sci. JPN 49, 8, 2000, pp.912-918 (in Japanese)
• [4] Committee on Coatings for High-temperature Structural Materials: Coatings for High-temperature Structural Materials, National Academy Press (1996)
• [5] CHARALAMBIDES P., LUND. J., EVANS. A., McMEEKING R.: A Test specimen for determining the fracture resistance of bimaterial interface, J. of Appl. Mech. 56, 1989, pp.77-82
• [6] Rice J.: Elastic Fracture Mechanics Concepts for interfacial Cracks, J. of Appl. Mech. 55, 1988, pp.98-103
• [7] CAO H., EVANS A.: An experimental study of the fracture resistance of bimaterial interface, Mechanics of Materials 7, 1989, pp.295-304.
• [8] ARAI M., OKAJIMA Y., KISHIMOTO K: Coating interface fracture toughness evaluation by a combination of edge compression and slinging load, Key Engineering Materials 261-263, 2004, pp.435-440, Trans. Tech. Pub.
• [9] ARAI M., OKAJIMA Y., KISHIMOTO K.: Coating interface fracture toughness test by combination of edge compression and slinging load, Proc. of 7'h ICBMFF, 2004, pp.501-506
• [10] ARAI M.: Micro-damage analysis of interface in thermal barrier coating system by particie binding layer model, J. of Jap. Soc. of Mech. Eng. 70, 689, 2004, pp. 1393-1398 (in Japanese)