Decoration of Dislocations by the Precipitation of Alumina in MgO · 2.9Al2O3 Spinel

Hisayuki Suematsu, Tetsuya Suzuki, Takayoshi Iseki, Tsutomu Mori

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A thermal etching technique is developed to reveal dislocations in MgO · nAl2O3 (n=2.9) single crystals decorated by Al2O3 precipitation. Large plastic deformation leads to a larger density of thermal etch pits. Also, dense arrays of pits, parallel to the traces of slip planes with a surface, are observed around a Vickers identation. The cracks developed by an indentation run selectively along the 〈100〉 directions and accompany dislocations arrayed in the possible slip planes.

Original languageEnglish
Pages (from-to)1449-1452
Number of pages4
JournalJournal of the American Ceramic Society
Issue number8
Publication statusPublished - 1989 Aug
Externally publishedYes


  • alumina
  • dislocations
  • etching
  • indentation
  • spinel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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