Processing and Deposition of Nanocrystalline Oxide Composites for Thermal Barrier Coatings
Abstract
This report describes the thermal stability and electrical conductivity of nanocrystalline oxide composites for thermal barrier coating applications. Electrophoretic deposition was used to coat the nanocomposite powders onto nickel substrates. The effect of alumina content, powder calcination temperature, and film thickness on the thermal stability of zirconia-based coatings was examined. It was found that a small addition of alumina (5 wt%) and high calcination temperatures (1300 deg C) enhanced the thermal stability of the coatings. Additionally, 50 micron-thick coatings were more thermally stable than thinner coatings. The electrical conductivity of the powders was also measured to determine the effect of alumina on oxygen conductivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 2000
- Accession Number
- ADA377008
Entities
People
- Jackie Y. Ying
- Justin T. Mccue
Organizations
- Massachusetts Institute of Technology