Grain-boundary microstructures in a liquid-phase sintered alumina (. cap alpha. -Al/sub 2/O/sub 3/)
Technical Report
·
OSTI ID:5265105
Grain boundary microstructures in a commercial 99.8% alumina ceramic have been analyzed using transmission electron microscopy. Nearly all boundaries are wet by an amorphous film, therefore, the CSL and DSC lattice construction should be invalidated. Facets of widely differing sizes are observed primarily on basal (0001), rhombohedral (anti 1012), and prism (11 anti 20) planes. The facets are always multiatomic in height and range up to approx. 1000A; this probably results from substantial anisotropy in the Al/sub 2/O/sub 3/-glass interfacial energy. Basal annealing twins are observed without amorphous films; they lie predominantly on (11 anti 20) and show interfacial energies much lower than adjacent random boundaries.
- Research Organization:
- Illinois Univ., Urbana (USA)
- DOE Contract Number:
- AC02-76ER01198
- OSTI ID:
- 5265105
- Report Number(s):
- DOE/ER/01198-1384; ON: DE82018655
- Country of Publication:
- United States
- Language:
- English
Similar Records
Grain boundary structure in alumina
Dislocations and twinning activated by the abrasion of Al{sub 2}O{sub 3}
Domain boundaries formed during epitactical growth. alpha. -Al sub 2 O sub 3
Technical Report
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5315165
Dislocations and twinning activated by the abrasion of Al{sub 2}O{sub 3}
Journal Article
·
Thu May 11 00:00:00 EDT 2000
· Acta Materialia
·
OSTI ID:20075940
Domain boundaries formed during epitactical growth. alpha. -Al sub 2 O sub 3
Conference
·
Sun Dec 31 23:00:00 EST 1989
·
OSTI ID:6191484