A STUDY OF THE PHYSICAL BASIS OF MECHANICAL PROPERTIES OF CERAMICS.

Abstract

A study of the physical basis for the mechanical properties of ceramics is reviewed. Brittle fracture studies in alumina are presented, along with a test method developed for studying the fracture resistance of ceramics. It has been shown that the fracture resistance of polycrystalline ceramics increases with grain size, whereas the modulus of rupture for the same specimens decreased with increasing grain size. The conclusion reached is that an optimum structural ceramic unit should combine large grains in its interior (for high fracture resistance) with a fine grain surface layer to minimize the depth of initial surface microcracks (for high modulus of rupture). Further evidence of a dislocation fracture mechanism in the alkali halides is also presented. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1966
Accession Number
AD0486701

Entities

People

  • Gordon E. Gross
  • Paul L. Gutshall

Organizations

  • MRIGlobal

Tags

DTIC Thesaurus Topics

  • Dislocations
  • Grain Size
  • Mechanical Properties
  • Physical Properties
  • Polycrystals
  • Resistance
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Surface Engineering/Surface Coating Technology.