Characterization of alumina/yttrium-aluminum garnet and alumina/yttrium-aluminum perovskite eutectics

Conference · Wed Aug 01 04:00:00 EDT 1990 · Ceramic Engineering and Science Proceedings; (USA)

OSTI ID:6314514

Matson, L E; Hay, R S; Mah, T

Alumina/yttrium-aluminum garnet (YAG) and alumina/yttrium-aluminum perovskite (YAP) eutectics were made by directional solidification. The two systems were characterized using transmitted polarized light microscopy, scanning electron microscopy, and transmission electron microscopy. The alumina/YAG system exhibited a degenerate eutectic with a Chinese script morphology, while the alumina/YAP eutectic had a rod/lamellae morphology. The c-axis of alumina was aligned perpendicular to the solidification direction, and elongated grains were aligned along the solidification direction in both systems. A single orientation relationship between alumina and YAG was observed. Several orientation relationships were observed in the alumina/YAP system. 5 refs.

• OSTI ID: 6314514
• Report Number(s): CONF-900160--
• Conference Information: Journal Name: Ceramic Engineering and Science Proceedings; (USA) Journal Volume: 11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
COMPOSITE MATERIALS
EUTECTICS
FABRICATION
MATERIALS
MICROSCOPY
MORPHOLOGY
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHASE TRANSFORMATIONS
REFRACTORIES
SOLIDIFICATION