Effect of bond-coat pre-aluminization and pre-oxidation duplex pretreatment on the performance of ZrO[sub 2]-8 wt. % Y[sub 2]O[sub 3]/Co-29Cr-6AI-1Y thermal barrier coatings

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Oxidation of Metals; (United States)

DOI:https://doi.org/10.1007/BF00664492· OSTI ID:5561268

Lih, W; Wu, B C; Peng, A ^[1]; Chang, E ^[2]; Chao, C H ^[3]

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1. Industrial Technology Research Inst., Hsinchu (Taiwan, Province of China)
2. National Cheng Kung Univ., Tainan (Taiwan, Province of China)
3. Aero Engine Factory/Aero Industry Development Center, Kang-Shan (Taiwan, Province of China)

A modification to the conventional thermal-barrier coating (TBC) system was made. In this study, the low-pressure, plasma-sprayed Co 29Cr 6Al 1Y bond coat received a duplex pretreatment of bond-coat pre-aluminizing and pre-oxidation prior to overlaying the air-plasma sprayed ZrO[sub 2] 8wt.% Y[sub 2]O[sub 3] top coat. The effects of this treatment on the properties of the TBC system were evaluated by thermal-cyclic test at 1050[degrees]C in air. The results of cyclic-oxidation tests showed that the proposed processes could remarkably improve the performance of ZrO[sub 2] 8wt.% Y[sub 2]O[sub 3]/Co-29Cr-6Al-1Y TBC. The improvement was attributed to a modification of bond-coat oxides and the associated reduction of the oxidation rate of the MCrAlY bond coat. 6 refs., 9 figs., 4 tabs.

• OSTI ID: 5561268
• Journal Information: Oxidation of Metals; (United States), Vol. 40:3-4; ISSN 0030-770X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
33 ADVANCED PROPULSION SYSTEMS
COBALT BASE ALLOYS
OXIDATION
COMBUSTORS
PROTECTIVE COATINGS
PERFORMANCE
PLASMA ARC SPRAYING
TURBINE BLADES
ALUMINIUM
ALUMINIUM ALLOYS
CERAMICS
CHROMIUM ALLOYS
DIFFUSION COATING
EXPERIMENTAL DATA
YTTRIUM ALLOYS
YTTRIUM OXIDES
ZIRCONIUM OXIDES
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
COATINGS
COBALT ALLOYS
DATA
DEPOSITION
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SPRAY COATING
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion
400201 - Chemical & Physicochemical Properties
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion
330100 - Internal Combustion Engines