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

Hisayuki Suematsu; Tetsuya Suzuki; Takayoshi Iseki; Tsutomu Mori

doi:10.1111/j.1151-2916.1989.tb07673.x

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 journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	1449-1452
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	72
Issue number	8
DOIs	https://doi.org/10.1111/j.1151-2916.1989.tb07673.x
Publication status	Published - 1989 Aug
Externally published	Yes

Keywords

alumina
dislocations
etching
indentation
spinel

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/j.1151-2916.1989.tb07673.x

Cite this

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title = "Decoration of Dislocations by the Precipitation of Alumina in MgO · 2.9Al2O3 Spinel",

abstract = "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.",

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author = "Hisayuki Suematsu and Tetsuya Suzuki and Takayoshi Iseki and Tsutomu Mori",

year = "1989",

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T1 - Decoration of Dislocations by the Precipitation of Alumina in MgO · 2.9Al2O3 Spinel

AU - Suematsu, Hisayuki

AU - Suzuki, Tetsuya

AU - Iseki, Takayoshi

AU - Mori, Tsutomu

PY - 1989/8

Y1 - 1989/8

N2 - 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.

AB - 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.

KW - alumina

KW - dislocations

KW - etching

KW - indentation

KW - spinel

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