Theory of Ceramic/Zirconia Composites: Toughening, Strengthening, and Synergism

Abstract

A review is given of recent theoretical results concerning toughening and strengthening in brittle ceramics reinforced with dilatantly transforming zirconia particles. Small-scale analysis of 'long' dominant cracks provides resistance curves that exhibit peak fracture toughnesses for finite amounts of crack growth. Similar results for the tensile fracture strengths of 'short' cracks have implications for transformation strengthening. The interaction due to the presence of both transforming particles and ductile metal particles can result in synergistic reinforcing effects over a parametric range of material properties. Keywords: Ceramic materials, Zirconium alloys, Particle reinforcements, Mechanical properties, Crystal structure, Transformation toughening, Transformation strengthening, Synergism.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA222931

Entities

People

  • B. Budiansky
  • D. M. Stump

Organizations

  • Harvard University

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Applied Mechanics
  • Ceramic Materials
  • Composite Materials
  • Crack Tips
  • Cracks
  • Crystal Structure
  • Leading Edges
  • Materials
  • Mechanics
  • Particles
  • Peak Values
  • Steady State
  • Stress Intensity Factors
  • Stresses
  • Structural Ceramics
  • Synergism
  • Tensile Stress

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Theoretical Analysis.