Investigation of the Use of Ceramic Material in Aircraft Engine Bearings

Abstract

A program to initiate life factor correlation between hot-presded silicon nitride rolling elements and M-50 steel hybrid rolling elements has been completed. All materials for component fabrication have been procured and qualified. Retainers and test tooling are complete. Complications in rolling contact fatigue qualification of roller stock, traced to specimen preparation techniques did not allow completion of bearing fabrication. A considerable effort was dedicated to study of the RCF qualification for ceramic materials resulting in development of machining techniques to produce bearing quality silicon nitride surfaces without super-finishining. Static Hertzian indentation of silicon nitride surfaces, fracture energy measurements, and radioactive gas penetrant tracers were found to be potentially valuable evaluation techniques for ceramics in the rolling contact environment. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA070631

Entities

People

  • John W. Lucek
  • Paul E. Cowley

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bearings
  • Ceramic Materials
  • Diamond Wheels
  • Environment
  • Fabrication
  • Machining
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Measurement
  • Silicon Carbide
  • Surface Properties
  • Test And Evaluation
  • Test Facilities
  • Turbines

Fields of Study

  • Materials science

Readers

  • Software Engineering
  • Structural Health Monitoring of Composite Structures.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).