Compressor Impeller Erosion Resistant Surface Treatment

Abstract

Electro-spark alloyed ?ESA) surfaces were developed as an erosion barrier for Ti-6-4 impellers on shaft driven compressors (SDCs). Coatings based on tungsten carbide tantalum carbide. titanium carbide all with a cobalt matrix were evaluated for high velocity particle erosion in conventional wear test studies as well as wind tunnel testing. In both cases the coating survived erosion by alumina and silica sand ranging in size from 50 to 200 microns. The ESA process formed these coatings with a full metallurgical bond, a nano-grained texture, and no heat affected zone in the base titanium alloy. The coatings demonstrated life extensions ranging from 3 to over 20 times, based upon test conditions. The ESA process was also demonstrated on actual impeller hardware for manufacturing feasibility considerations. This was a Phase I SBIR through NAVAIR Pax River MD.

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Document Details

Document Type
Technical Report
Publication Date
Oct 09, 2000
Accession Number
ADA382867

Entities

People

  • Michael A. Riley

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Ground and Sea Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Oxides
  • Ceramic Materials
  • Chemistry
  • Compressors
  • Failure Mode And Effect Analysis
  • Materials
  • Metals
  • Tantalum Carbides
  • Test And Evaluation
  • Test Facilities
  • Test Methods
  • Titanium
  • Titanium Alloys
  • Tungsten Carbides
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Materials science

Readers

  • Marine Hydrodynamics
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.