Strengthening and Strength Uniformity of Structural Ceramics.

Abstract

The results of a four year study aimed at improving the strength and reliability of structural ceramics are summarized. Strength-degrading flaw populations were identified and processing methods were developed to eliminate each flaw population, thereby increasing the strength of Al2O3-ZrO2 composites by a factor of three. The final year's work, which is reported in detail here, concentrated on the introduction of beneficial surface stresses by grinding, identification of strength-controlling characteristics of transformation toughened ceramics, and manipulation of microstructure by controlling grain growth. Requirements for inhibition of grain growth by several phase particles (particle size, volume fraction) were identified and grain-size control in transformation toughened materials was achieved by sintering in a two-phase field. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1985
Accession Number
ADA159170

Entities

People

  • D. B. Marshall
  • F. F. Lange

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Ceramic Materials
  • Composite Materials
  • Diffraction
  • Electron Microscopes
  • Fabrication
  • Heat Treatment
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Stresses
  • Structural Ceramics

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design