Acoustic emission from thermally cycled plasma-sprayed oxides

Journal Article · Sun May 01 04:00:00 EDT 1983 · Am. Ceram. Soc. Bull.; (United States)

OSTI ID:6421013

Ravi Shankar, N; Berndt, C C

Acoustic emission methodology was used to study a variety of plasma-sprayed oxide coatings subjected to thermal cycling in the range 25 to 650 C. Coatings of Al2O3, TiO2, CaO-stabilized ZrO2, and Y2O3-stabilized ZrO2, sprayed onto one end of a steel substrate, with and without NiCrAl bond coat, were examined to relate acoustic activity to coating failure. Generally, multicomponent coatings produced lower acoustic counts than single component oxide coatings. It is suggested that acoustic emission behavior is correlated to phase transformation and cracking, and shows promise for evaluation of thermal fatigue resistance of plasma-sprayed oxide coatings. 25 references.

• Research Organization: New York State Univ., Stony Brook
• OSTI ID: 6421013
• Journal Information: Am. Ceram. Soc. Bull.; (United States), Journal Name: Am. Ceram. Soc. Bull.; (United States) Vol. 62; ISSN ACSBA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ACOUSTIC EMISSION TESTING
ACOUSTIC TESTING
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COATINGS
DEPOSITION
FATIGUE
MATERIALS TESTING
MECHANICAL PROPERTIES
NONDESTRUCTIVE TESTING
OXIDES
OXYGEN COMPOUNDS
PLASMA ARC SPRAYING
SPRAY COATING
SPRAYED COATINGS
SURFACE COATING
TESTING
THERMAL FATIGUE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES