A mechanism to describe the basal twinning of sapphire
Journal Article
·
· Acta Metallurgica et Materialia; (United States)
- Dept. of Geology, Univ. of California, Davis, CA (United States)
- Dept. of Mechanical,Aeronautical, and Materials Engineering, Univ. of California, Davis, CA (United States)
This paper reports on the mechanical twinning of sapphire which can be simply explained by the passage of pairs of partial dislocations of the type 1/3 [lt] [bar 1]010 [gt](0001) on adjacent planes. This can occur in one of two different ways where the basal planes of oxygen and aluminum ions move as a unit to produce a macroscopic shear of 0. 634. In one case a perfect mirror twin is formed and in the other the mirror twin appears only in the aluminum sublattice.
- OSTI ID:
- 6798065
- Journal Information:
- Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 40:12; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Journal Article
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Wed May 01 00:00:00 EDT 1996
· Acta Materialia
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OSTI ID:247965
On basal slip and basal twinning in sapphire ({alpha}-Al{sub 2}O{sub 3}). 2: A new model of basal twinning
Journal Article
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Wed May 01 00:00:00 EDT 1996
· Acta Materialia
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OSTI ID:247966
Dislocations and twinning activated by the abrasion of Al{sub 2}O{sub 3}
Journal Article
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Thu May 11 00:00:00 EDT 2000
· Acta Materialia
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OSTI ID:20075940
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
664400 -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM IONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CORUNDUM
CRYSTAL STRUCTURE
DISLOCATION PINNING
IONS
KINETICS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
OXIDE MINERALS
OXYGEN IONS
REACTION KINETICS
SAPPHIRE
SHEAR
TWINNING
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
664400 -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM IONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CORUNDUM
CRYSTAL STRUCTURE
DISLOCATION PINNING
IONS
KINETICS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
OXIDE MINERALS
OXYGEN IONS
REACTION KINETICS
SAPPHIRE
SHEAR
TWINNING