Silicon Nitride for Airborne Turbine Applications.

Abstract

Procedures are described for processing a commercially available alpha-Si3N4 power which allow it to be hot-pressed to theoretical density when small additions of BeSiN2 are added to the processed powder. Studies of the macro- and microstructural character of the hot pressed ceramic were conducted. The results of that study emphasized the need for thorough and homogeneous blending of the Si3N4 powder prepared and made ready for hot pressing. Investigations were conducted on the thermomechanical behavior of the fully dense hot pressed Si3N4 and measurements made at temperatures up to 1500 C of important thermomechanical properties. These properties included creep resistance, strength, dynamic fatigue and oxidation resistance. Comparison of these data were made with properties determined for NC-132, a commercial hot pressed Si3N4 ceramic. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1978
Accession Number
ADA057338

Entities

People

  • Charles D. Greskovich
  • John A. Palm

Organizations

  • General Electric

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Body Weight
  • Ceramic Materials
  • Chemical Elements
  • Chemical Reactions
  • Chemistry
  • Fabrication
  • Manufacturing
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Military Research
  • Oxidation Resistance
  • Resistance
  • Silicon Carbide

Fields of Study

  • Materials science

Readers

  • Integrated Circuit Design and Technology.
  • Metallurgy