Mechanical properties of solution-precursor plasma-sprayed thermal barrier coatings

被引：24

作者：

Jadhav, Amol D. ^{[1
]}

Padture, Nitin P. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 20期

关键词：

thermal barrier coatings; toughness; mechanical testing; finite element analysis;

D O I：

10.1016/j.surfcoat.2008.04.091

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure of thermal barrier coatings (TBCs) of 7 Wt-% Y2O3 stabilized ZrO2 (7YSZ) deposited using the solution-precursor plasma spray (SPPS) method has: (i) controlled porosit)4 (ii) vertical cracks, and (iii) lack of large-scale "splat" boundaries. An unusual feature of such SPPS TBCs is that they are well-adherent in ultra-thick forms (-4 mm thickness), where most other types of ultra-thick ceramic coatings fail spontaneously. Here a quantitative explanation is provided as to why as-deposited ultra-thick SPPS TBCs are so well-adherent. The mode 11 toughness of thin (0.2 mm) SPPS TBCs has been measured using the "barb" shear test, which is found to be 66 J m(-2). Residual stresses in SPPS TBCs of thickness 0.2,13, and 4.0 mm have been estimated using a microstructure-based object-oriented finite element (OOF) method. These stresses are found to be low. as a result of the strain-tolerant microstructure of the SPPS TBCs. The corresponding strain energy release rates that drive mode II cracks in the three different thickness SPPS TBCs have been found to be less than the mode II toughness. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：4976 / 4979

页数：4

共 32 条

[21] Towards durable thermal barrier coatings with novel microstructures deposited by solution-precursor plasma spray [J].

Padture, NP ;

Schlichting, KW ;

Bhatia, T ;

Ozturk, A ;

Cetegen, B ;

Jordan, EH ;

Gell, M ;

Jiang, S ;

Xiao, TD ;

Strutt, PR ;

García, E ;

Miranzo, P ;

Osendi, MI .

ACTA MATERIALIA, 2001, 49 (12) :2251-2257

[22] Analysis of stresses in aluminum-silicon alloys [J].

Saigal, A ;

Fuller, ER .

COMPUTATIONAL MATERIALS SCIENCE, 2001, 21 (01) :149-158

[23] Failure modes in plasma-sprayed thermal barrier coatings [J].

Schlichting, KW ;

Padture, NP ;

Jordan, EH ;

Gell, M .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 342 (1-2) :120-130

[24]

Suresh S., 1998, FUNDAMENTALS FUNCTIO

[25]

TAGUCHI K, 2007, 31 INT C EXP ADV CER

[26] PLASMA-SPRAYED YTTRIA-STABILIZED ZIRCONIA COATINGS - STRUCTURE-PROPERTY RELATIONSHIPS [J].

TAYLOR, TA ;

APPLEBY, DL ;

WEATHERILL, AE ;

GRIFFITHS, J .

SURFACE & COATINGS TECHNOLOGY, 1990, 43-4 (1-3) :470-480

[27] Effects of pores and interfaces on effective properties of plasma sprayed zirconia coatings [J].

Wang, Z ;

Kulkarni, A ;

Deshpande, S ;

Nakamura, T ;

Herman, H .

ACTA MATERIALIA, 2003, 51 (18) :5319-5334

[28] Deposition mechanisms of thermal barrier coatings in the solution precursor plasma spray process [J].

Xie, LD ;

Ma, XQ ;

Jordan, EH ;

Padture, NP ;

Xiao, DT ;

Gell, M .

SURFACE & COATINGS TECHNOLOGY, 2004, 177 :103-107

[29] Phase and microstructural stability of solution precursor plasma sprayed thermal barrier coatings [J].

Xie, LD ;

Jordan, EH ;

Padture, NP ;

Gell, M .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 381 (1-2) :189-195

[30] Processing parameter effects on solution precursor plasma spray process spray patterns [J].

Xie, LD ;

Ma, XQ ;

Ozturk, A ;

Jordan, EH ;

Padture, NP ;

Cetegen, BM ;

Xiao, DT ;

Gell, M .

SURFACE & COATINGS TECHNOLOGY, 2004, 183 (01) :51-61

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