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http://dx.doi.org/10.3795/KSME-A.2008.32.7.569

Evaluation of Bond Strength of Isothermally Aged Plasma Sprayed Thermal Barrier Coating  

Kim, Dae-Jin (성균관대학교 기계공학부)
Lee, Dong-Hoon (성균관대학교 기계공학부)
Koo, Jae-Mean (성균관대학교 기계공학부)
Song, Sung-Jin (성균관대학교 기계공학부)
Seok, Chang-Sung (성균관대학교 기계공학부)
Kim, Mun-Young (한전 KPS(주) G/T 정비기술센터)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.7, 2008 , pp. 569-575 More about this Journal
Abstract
In this study, disk type of thermal barrier coating system for gas turbine blade was isothermally aged in the furnace changing exposure time and temperature. For each aging condition, bond tests for three samples were conducted for evaluating degradation of adhesive or cohesive strength of thermal barrier coating system. For as-sprayed condition, the location of fracture in the bond test was in the middle of epoxy which have bond strength of 57 MPa. As specimens are degraded by thermal aging, bond strength gradually decreased and the location of failure was also changed from within top coat at the earlier stage of thermal aging to the interface between top coat and TGO at the later stage due to the delamination in the coating.
Keywords
Thermal Barrier Coating; Degradation; Thermally Grown Oxide; Bond Test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 3
연도 인용수 순위
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