Damage growth triggered by interface irregularities in thermal barrier coatings

被引：97
|
作者：
Hille, Thomas S. [2 ,3 ]
Nijdam, Thijs J. [1 ,2 ]
Suiker, Akke S. J. [3 ]
Turteltaub, Sergio [3 ]
Sloof, Wim G. [1 ]
机构：
[1] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands
[2] Delft Univ Technol, M2i, NL-2629 HS Delft, Netherlands
[3] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands
来源：
ACTA MATERIALIA | 2009年 / 57卷 / 09期
关键词：
Thermal barrier coating (TBC); Finite element modeling (FEM); Fracture; Diffusion; Oxidation; NICOCRALY BOND COATINGS; PREOXIDATION TREATMENT; MECHANICAL-PROPERTIES; FAILURE MECHANISMS; SYSTEMS; OXIDATION; DELAMINATION; DEPOSITION; ROUGHNESS; THICKNESS;
D O I：
10.1016/j.actamat.2009.01.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The efficiency and reliability of modern jet engines strongly depend on the performance of thermal barrier coatings (TBCs), which prevent melting and oxidation of the turbine blades' structural core. The system's lifetime is limited by cracks appearing in and in the vicinity of an oxide layer that grows in the TBC under thermal cycling. High replacement costs have led to an increased demand to identify, quantify and remedy damage in TBCs. An integrated experimental-numerical approach is presented for studying the main, particularly interfacial irregularities. Damage at several stages of oxidation in TBCs is analyzed in factors that contribute to damage. samples with predefined interfacial irregularities. The model predicts the experimentally observed crack patterns, clearly quantifying the influence of imperfections and indicating that damage can be delayed by Surface treatment. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2624 / 2630
页数：7
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