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Dislocation‐Induced Softening of MgO·2.9Al 2 O 3 Single Crystals
Author(s) -
Suematsu Hisayuki,
Suzuki Tetsuya,
Iseki Takayoshi,
Mori Tsutomu
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06120.x
Subject(s) - materials science , spinel , softening , dislocation , transmission electron microscopy , plasticity , composite material , ductility (earth science) , deformation (meteorology) , crystallography , vickers hardness test , dislocation creep , single crystal , magnesium , mineralogy , metallurgy , condensed matter physics , microstructure , creep , chemistry , nanotechnology , physics
Magnesium aluminate spinel (MgO·2.9Al 2 O 3 ) single crystals were deformed in compression along the [001] direction at temperatures between 1100° and 1500°C. Dislocations introduced by plastic deformation were observed by transmission electron microscopy. These dislocations lead to plasticity at a temperature where undeformed spinel has no ductility. Further, room‐temperature Vickers hardness decreases after plastic deformation at 1500°C.