Characterization of commercial EB-PVD TBC systems with CVD (Ni,Pt)Al bond coatings

被引：56

作者：

Haynes, JA ^{[1
]}

Lance, MJ ^{[1
]}

Pint, BA ^{[1
]}

Wright, IG ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2001年 / 146卷

关键词：

electron-beam physical vapor deposition (EB-PVD); thermal barrier coating (TBC); aluminide bond coat;

D O I：

10.1016/S0257-8972(01)01483-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Failure of electron-beam physical vapor deposition (EB-PVD) thermal barrier coatings (TBCs) with aluminide bond coats is strongly influenced by bond coat oxidation behavior. This study investigated oxide (Al2O3) formation during EB-PVD processing of TBCs with (NiPt)Al bond coats. The effects of substrate composition, coating impurities and bond-coat grit-blasting on the oxide phases, residual stress and microstructure were evaluated. As-deposited, high-purity commercial bond coats contained high concentrations of sulfur and other impurities at their surfaces. Numerous small voids formed at the oxide-metal interface when as-deposited bond coats were oxidized during EB-PVD processing. Grit-blasting of (Ni,Pt)AI had a significant impact, since the formation of alpha -Al2O3 during EB-PVD processing was significantly enhanced and voids did not form beneath the scale. Preliminary cyclic oxidation testing suggested an influence of superalloy sulfur content on TBC durability. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：140 / 146

页数：7

共 19 条

[1]

BASTA WC, 1997, Patent No. 5658614

[2] Nondestructive evaluation of the oxidation stresses through thermal barrier coatings using Cr3+ piezospectroscopy [J].

Christensen, RJ ;

Lipkin, DM ;

Clarke, DR ;

Murphy, K .

APPLIED PHYSICS LETTERS, 1996, 69 (24) :3754-3756

[3] DEVELOPMENT, GROWTH, AND ADHESION OF AL2O3 ON PLATINUM-ALUMINUM ALLOYS [J].

FELTEN, EJ ;

PETTIT, FS .

OXIDATION OF METALS, 1976, 10 (03) :189-223

[4] Bond strength, bond stress and spallation mechanisms of thermal barrier coatings [J].

Gell, M ;

Jordan, E ;

Vaidyanathan, K ;

McCarron, K ;

Barber, B ;

Sohn, YH ;

Tolpygo, VK .

SURFACE & COATINGS TECHNOLOGY, 1999, 120 :53-60

[5] Effects of platinum additions on the adherence of alumina scales to CVD aluminide bond coatings [J].

Haynes, JA ;

More, KL ;

Pint, BA ;

Wright, IG ;

Cooley, K ;

Zhang, Y .

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2, 2001, 369-3 :679-686

[6] Potential influences of bond coat impurities and void growth on premature failure of EB-PVD TBCs [J].

Haynes, JA .

SCRIPTA MATERIALIA, 2001, 44 (07) :1147-1152

[7]

HAYNES JA, 1999, ELEVATED TEMPERATURE, V3, P185

[8]

Lance MJ, 1998, CERAM TRANS, V89, P229

[9] Effects of sulfur impurity on the scale adhesion behavior of a desulfurized Ni-based superalloy aluminized by chemical vapor deposition [J].

Lee, WY ;

Zhang, Y ;

Wright, IG ;

Pint, BA ;

Liaw, PK .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (03) :833-841

[10] Transition in high-temperature oxidation kinetics of Pd-modified aluminide coatings: Role of oxygen partial pressure, heating rate, and surface treatment [J].

Monceau, D ;

Bouhanek, K ;

Peraldi, R ;

Malie, A ;

Pieraggi, B .

JOURNAL OF MATERIALS RESEARCH, 2000, 15 (03) :665-675

← 1 2 →