Development and evaluation of plasma-sprayed MgO-ZrO/sub 2/ and ZrO/sub 2/-Y/sub 2/O/sub 3/ thermal-barrier coatings

Technical Report · Fri Jan 22 04:00:00 EST 1982

OSTI ID:5264794

Taylor, T A; Price, M O

The goals of this thermal barrier improvement program were achieved. A new thermal barrier coating was developed which had much superior thermal fatigue resistance than previous base-line thermal barrier coatings. The high density plus microcracked ZrO/sub 2/-6.6Y/sub 2/O/sub 3/ lasted about three times longer in a 2260/sup 0/F thermal fatique test and more than five times longer in the 2100/sup 0/F test than the current standard, medium density MgO.ZrO/sub 2/. Both the MgO.ZrO/sub 2/ and ZrO/sub 2/-6.6Y/sub 2/O/sub 3/ families of coatings passed the cyclic corrosion test without failure. The same corrosion test caused massive spallation in a porous ZrO/sub 2/-2OY/sub 2/O/sub 3/ coating. This work also demonstrated the usefulness of a controlled microcrack population and an internally strong oxide microstructure.

• Research Organization: Union Carbide Corp., Indianapolis, IN (USA). Engineering Products Div.
• DOE Contract Number: AC03-78ET13327
• OSTI ID: 5264794
• Report Number(s): DOE/ET/13327-T2; ON: DE82013724
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
CRYSTAL STRUCTURE
DEPOSITION
FATIGUE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
STRESSES
SURFACE COATING
TESTING
THERMAL STRESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES