The R-curve response of ceramics with microscopic reinforcements: Reinforcement and additive effects Metadata

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  • Main Title The R-curve response of ceramics with microscopic reinforcements: Reinforcement and additive effects


  • Author: Becher, P.F.
    Creator Type: Personal
  • Author: Sun, E.Y.
    Creator Type: Personal
  • Author: Plucknett, K,P.
    Creator Type: Personal
  • Author: Hsueh, C.H.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)


  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee
    Additional Info: Oak Ridge National Lab., TN (United States)


  • Creation: 1996-05-01


  • English


  • Content Description: Using direct observations with the scanning electron and optical microscopes, simultaneous measurements of fracture resistance versus crack length (R-curve behavior) and crack interactions with microstructural features at the crack tip and in its wake were made. Selecting whisker-reinforced aluminas and self-reinforced silicon nitrides, one can examine the effects of systematic modifications of microstructure and composition on the R-curve response and the mechanisms giving rise to it. Specifically, increases in whisker content and size can increase the R-Curve response, even for short crack lengths. In the self-reinforced silicon nitrides, changes in alumina: yttria additive ratios also modify the R-curve. Modeling of the R-curve response allows one to verify toughening mechanisms and, with experimental studies, to optimize the R-curve behavior in ceramics containing microscopic reinforcements, e.g., whiskers and elongated grain structures.
  • Physical Description: 13 p.


  • Keyword: Crack Propagation
  • Keyword: Cracks
  • Keyword: Silicon Nitrides
  • STI Subject Categories: 36 Materials Science
  • Keyword: Whiskers
  • Keyword: Grain Size
  • Keyword: Microstructure
  • Keyword: Yttrium Oxides
  • Keyword: Aluminium Oxides
  • Keyword: Optical Microscopes
  • Keyword: Fracture Properties
  • Keyword: Reinforced Materials


  • Conference: 1996 NATO engineering ceramics conference, Bratislava (Slovakia), 12-15 May 1996


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Other: DE96010461
  • Report No.: CONF-9605168--1
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 236283
  • Archival Resource Key: ark:/67531/metadc670149


  • Display Note: OSTI as DE96010461