Processing and Deposition of Nanocrystalline Oxide Composites for Thermal Barrier Coatings

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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 2000
Accession Number
ADA379974

Entities

People

  • Jackie Y. Ying
  • Justin T. Mccue

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Barrier Coatings
  • Chemical Engineering
  • Coatings
  • Composite Materials
  • Electrophoretic Deposition
  • Failure Mode And Effect Analysis
  • Heat Treatment
  • Materials
  • Materials Processing
  • Nanocomposites
  • Shock
  • Substrates
  • Thermal Shock
  • Thermal Stability
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Surface Engineering/Surface Coating Technology.