Thermal Fatigue Damage Behavior of Plasma Sprayed Thermal Barrier Coatings

Abstract:

Article Preview

Thermal fatigue and isothermal oxidation tests of a plasma sprayed thermal barrier coatings have been carried out. The experimental results indicated that micro-cracking as the fatigue damage occurred in each cooling stage of thermal cycles. And the spallation fracture morphology was changed by the cycle wave form; the spallation failure occurred in the ceramic top-coating under the triangle cycle wave condition, on the other hand, it occurred near the top-coating/TGO interface under the trapezoidal wave condition. The finite element analysis indicated that the local residual stress, which is the driving force of interfacial damage, increases with the thickness of the thermal grown oxide. The degradation mechanism by thermal fatigue was discussed, in addition, a simple life prediction model for the thermal fatigue of TBC systems was proposed.

Info:

Periodical:

Key Engineering Materials (Volumes 417-418)

Edited by:

M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee

Pages:

85-88

DOI:

10.4028/www.scientific.net/KEM.417-418.85

Citation:

Y. Yamazaki and T. Yoshida, "Thermal Fatigue Damage Behavior of Plasma Sprayed Thermal Barrier Coatings", Key Engineering Materials, Vols. 417-418, pp. 85-88, 2010

Online since:

October 2009

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.