Evaluation of the Mechanical Characteristics According to the Curvature of Thermal Barrier Coating

被引：0

作者：

Lee, Jeng-Min ^{[1
]}

Seok, Chang-Sung ^{[1
]}

Koo, Jae-Mean ^{[1
]}

Kim, Sung Hyuk ^{[1
]}

Zhen, Guo ^{[1
]}

Tao, Shen ^{[1
]}

Moon, Wonki ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Mech Engn, Seoul, South Korea

来源：

TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A | 2014年 / 38卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

Thermal Barrier Coating; Finite Element Analysis; Gas Turbine Blade;

D O I：

10.3795/KSME-A.2014.38.12.1427

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A thermal barrier coating (TBC) prevents heat directly transferring from a high-temperature flame to a substrate. The TBC system comprises a top coating and bond coating. TBC technology reduces the substrate surface temperature by about 100-170 degrees C. In the TBC system, internal stress is generated by the difference in thermal expansion coefficients of the substrate and coating. The internal stress also differs according to the shape and position of the blade. In this study, finite element analysis was performed for different curvatures of coin-shaped specimens, which are commonly used for thermal fatigue tests, and the changes in internal stress of the TBC system were compared. Based on the results, the curvature at which the minimum stress occurs was derived, and the thermal stress was confirmed to increase with the difference between a given curvature and the curvature with the minimum stress.

引用

页码：1427 / 1430

页数：4

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