Microstructure of Y[sub 2]O[sub 3]-stabilized ZrO[sub 2] electron beam-physical vapor deposition coatings on Ni-base superalloys

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb07256.x· OSTI ID:7236498

Unal, O; Mitchell, T E; Heuer, A H ^[1]

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1. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Materials Science and Engineering

The microstructures of ZrO[sub 2]-20 wt % Y[sub 2]O[sub 3] thermal barrier coatings formed by electron beam-physical vapor deposition on a Ni-base superalloy have been studied by transmission electron microscopy. The coating systems consist of several layers, including a superalloy substrate, a bond coat, an Al[sub 2]O[sub 3] scale, and the PVD coating. The overall ceramic thermal barrier coatings were characterized, with special emphasis being given to the [alpha]-Al[sub 2]O[sub 3] scale which forms between the bond coat and the ZrO[sub 2]-Y[sub 2]O[sub 3] coating. The oxide scale exhibited various morphologies in different coating systems; the majority of the porosity formed in this region for all coatings.

• OSTI ID: 7236498
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:4; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALLOYS
CHALCOGENIDES
COATINGS
CORROSION PROTECTION
DATA
DEPOSITION
ENERGY BEAM DEPOSITION
EXPERIMENTAL DATA
INFORMATION
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL VAPOR DEPOSITION
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
VAPOR DEPOSITED COATINGS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES