Erosion and Foreign Object Damage of Thermal Barrier Coatings

Abstract

Thermal barrier coating are perceived as an enabling technology to increase the performance of, improve efficiency within, and lower the emissions from modern gas turbines. To fully utilize this capability one has to be able to accurately predict the life of these coatings under conditions relevant to gas turbine service. This paper addresses the failure of TBC systems as a result of erosion and foreign object damage. Laboratory studies under controlled conditions using a high temperature gas gun rig are reported and compared to damage observed within engines. Models for erosion and foreign object damage have been reviewed and results from these models compared to observed damage mechanisms. The damage mechanisms that result are related to service parameters including temperature, velocity, particle size, impact angle and TBC material properties.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2004
Accession Number
ADA440985

Entities

People

  • J. R. Nicholls
  • R. G. Wellman

Organizations

  • Cranfield University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Barrier Coatings
  • Coatings
  • Engines
  • Erosion Resistance
  • Foreign Object Damage
  • Gas Guns
  • Gas Turbines
  • High Temperature
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Particle Size
  • Particles
  • Stress Waves
  • Test Facilities
  • Turbines

Readers

  • Computer Vision.
  • Structural Health Monitoring of Composite Structures.
  • Surface Engineering/Surface Coating Technology.