Study on the Turbine Vane and Blade for a 1500°C Class Industrial Gas Turbine

Amagasa, S.; Shimomura, K.; Kadowaki, M.; Takeishi, Kenichiro; Kawai, Hisataka; Aoki, S.; Aoyama, K.

doi:10.1115/1.2906861

Cited by 31 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermal barrier coatings (TBC) are used for developing high-performance and high-reliability gas turbine vanes and blades [1,2]. A TBC allows the reduction of turbine cooling air requirements and metal temperatures and, consequently, improves the performance and efficiency of the turbine and the durability of its components.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Crack Propagation along Bond Coat/Topcoat Interface of a TBC System

Gomez

Miyashita

Mutoh

et al. 2004

KEM

View full text Add to dashboard Cite

The crack propagation along the bond coat / topcoat interface of a TBC system has been studied in a previous work under a certain mode ratio (K2/K1). In order to discuss a parameter that describes the crack propagation, the growth behavior of a crack has to be studied under various K2/K1 ratios. In this work, BEM was used to determine the modifications that change K2/K1 ratios of the specimen employed in the previous study. Six characteristics of the specimen were modified: location of the applied load; height; length, position and direction of the notch, and its separation from the bond coat / topcoat interface. Among these modifications, the change of location of load point can effectively change K2/K1 ratio to values greater and smaller than those of the previous study. Crack propagation tests with three different positions of load point were performed using specimens with topcoat porosity of 5%, 15% and 20%. The results indicated that, independently of K2/K1 ratio, the parameter Ki dominated the crack growth behavior for an interface crack under mixed mode.

show abstract

Section: Introductionmentioning

confidence: 99%