On the role of TGO growth in the interface undulation in MCrAlY coating system upon thermal cycling

被引：16

作者：

Cen, L. ^{[1
]}

Qin, W. Y. ^{[1
]}

Yu, Q. M. ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710129, Shaanxi, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 17期

基金：

中国国家自然科学基金;

关键词：

thermal cycling; TGO growth; Interface undulation; FINITE-ELEMENT SIMULATION; BARRIER COATINGS; BOND-COAT; STRESS-DISTRIBUTION; DISPLACEMENT INSTABILITY; OXIDE THICKNESS; OXIDATION; DELAMINATION; EVOLUTION; ROUGHNESS;

D O I：

10.1016/j.ceramint.2019.07.322

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The bond-coat/TGO (thermally grown oxide) interface has been experimentally observed to progressively undulate upon thermal cycling. This work presents a study on the role of TGO growth in the interface undulation. An axisymmetric finite element model was built based on the ratcheting phenomenon. It is found that the interface undulation is associated with not only the compressive stresses in the TGO but also the softness of the bond-coat. The compressive stresses provide the driving force for the interface undulation. At high temperature lengthening TGO growth is responsible for the compressive stresses and therefore plays a crucial role in the interface undulation. The bond-coat needs to be soft enough to accommodate the interface undulation. Thickening TGO growth itself almost has no effect on the interface undulation, but the variation of TGO thickness appears to affect the sensitivity of the interface undulation to the lengthening strain rate of TGO growth.

引用

页码：22802 / 22812

页数：11

共 62 条

[31] Finite element analysis of anti-spallation thermal barrier coatings [J].

Liu, AG ;

Wei, YH .

SURFACE & COATINGS TECHNOLOGY, 2003, 165 (02) :154-162

[32] Effect of neck formation on the sintering of air-plasma-sprayed thermal barrier coating system [J].

Lv, Bowen ;

Fan, Xueling ;

Xie, Hua ;

Wang, T. J. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2017, 37 (02) :811-821

[33] Influence of thermal cycle on surface evolution and oxide formation in a superalloy system with a NiCoCrAlY bond coat [J].

Mercer, C. ;

Hovis, D. ;

Heuer, A. H. ;

Tomimatsu, T. ;

Kagawa, Y. ;

Evans, A. G. .

SURFACE & COATINGS TECHNOLOGY, 2008, 202 (20) :4915-4921

[34] Thermo-mechanical stress analysis of thermal barrier coating system considering thickness and roughness effects [J].

Moridi, A. ;

Azadi, M. ;

Farrahi, G. H. .

SURFACE & COATINGS TECHNOLOGY, 2014, 243 :91-99

[35]

Moridi A., 2011, P WORLD C ENG, V2192

[36] Characterization of a cyclic displacement instability for a thermally grown oxide in a thermal barrier system [J].

Mumm, DR ;

Evans, AG ;

Spitsberg, IT .

ACTA MATERIALIA, 2001, 49 (12) :2329-2340

[37]

N.R.C.C.o.C.f.H.-T.S.Materials, 1996, COATINGS HIGH TEMPER

[38] Effect of processing parameters on MCrAlY bondcoat roughness and lifetime of APS-TBC systems [J].

Nowak, W. ;

Naumenko, D. ;

Mor, G. ;

Mor, F. ;

Mack, D. E. ;

Vassen, R. ;

Singheiser, L. ;

Quadakkers, W. J. .

SURFACE & COATINGS TECHNOLOGY, 2014, 260 :82-89

[39] Materials science - Thermal barrier coatings for gas-turbine engine applications [J].

Padture, NP ;

Gell, M ;

Jordan, EH .

SCIENCE, 2002, 296 (5566) :280-284

[40] Experimental investigation of the bond-coat rumpling instability under isothermal and cyclic thermal histories in thermal barrier systems [J].

Panat, R ;

Hsia, KJ .

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2004, 460 (2047) :1957-1979

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