Accession Number:

ADA379974

Title:

Processing and Deposition of Nanocrystalline Oxide Composites for Thermal Barrier Coatings

Descriptive Note:

Technical rept. 1 Apr-30 Jun 2000

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING

Personal Author(s):

• Ying, Jackie Y.
• McCue, Justin T.

Report Date:

2000-06-30

Pagination or Media Count:

6.0

Abstract:

This report describes the thermal stability of nanocrystalline oxide composites for thermal barrier coating applications. The coatings were tested fo long-term and thermal shock stability. Electrophoretic deposition EFD was used to coat the nanocomposite powders onto nickel substrates. A NiCrAlY bond coat was also coated onto the Ni substrates prior to deposition of the nanocrystalline oxide composites. It was found that a small addition of alumina 5 wt enhanced the thermal stability of the coatings. The NiCrAlY bond coat, when coated using electrophoretic deposition did not significantly enhance the thermal stability of the coatings. Future work will combine plasma-sprayed bond coats with oxide composites deposited via EPO.

Descriptors:

• *BARRIER COATINGS
• X RAY DIFFRACTION
• ALUMINUM OXIDES
• PLASMA SPRAYING
• ELECTROPHORESIS
• ZIRCONIUM OXIDES
• ELECTRODEPOSITION

Subject Categories:

• Coatings, Colorants and Finishes
• Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE