Decoration of dislocations by the precipitation of alumina in mgo·2.9Al 2O 3 spinel

Hisayuki Suematsu, Tetsuya Suzuki, Takayoshi Iseki, Tsutomu Mori

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A thermal etching technique is developed to reveal dislocations in MgO · nAl 2O 3(n=2.9) single crystals decorated by Al 2O 3 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 identa-tion. The cracks developed by an indentation run selectively along the 〈00〉 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
Volume72
Issue number8
DOIs
Publication statusPublished - 1989 Aug
Externally publishedYes

Fingerprint

Aluminum Oxide
Alumina
Indentation
Etching
Plastic deformation
Single crystals
Cracks
Hot Temperature
spinell
Direction compound

Keywords

  • Alumina
  • Dislocations
  • Etching
  • Indentation
  • Spinel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Decoration of dislocations by the precipitation of alumina in mgo·2.9Al 2O 3 spinel. / Suematsu, Hisayuki; Suzuki, Tetsuya; Iseki, Takayoshi; Mori, Tsutomu.

In: Journal of the American Ceramic Society, Vol. 72, No. 8, 08.1989, p. 1449-1452.

Research output: Contribution to journalArticle

Suematsu, Hisayuki ; Suzuki, Tetsuya ; Iseki, Takayoshi ; Mori, Tsutomu. / Decoration of dislocations by the precipitation of alumina in mgo·2.9Al 2O 3 spinel. In: Journal of the American Ceramic Society. 1989 ; Vol. 72, No. 8. pp. 1449-1452.
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