Low temperature sintering of Al/sub 2/O/sub 3/-CaO

Technical Report · Wed Feb 01 04:00:00 EST 1984

OSTI ID:5088791

Wu, S J

Research was conducted to study the effect of CaO addition on the pre-eutectic densification of alpha-alumina powders. Two sintering methods were used: (a) constant heating rate sintering and (b) constant temperature sintering. The microstructure evolution was examined extensively by scanning and transmission electron microscopy and by x-ray diffractometry. It was found that the addition of CaO activates several mechanisms affecting the densification rate of Al/sub 2/O/sub 3/-CaO powder compacts. Among them, a solid solution effect and a second phase effect decreased the sintering rate. However, enhanced pre-eutectic densification effect was also observed within a narrow range of composition.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5088791
• Report Number(s): LBL-16959; ON: DE84010713
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
DISPERSIONS
ELECTRON MICROSCOPY
FABRICATION
MICROSCOPY
MICROSTRUCTURE
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POWDERS
SINTERING