Role of powder packing in sintering

Conference · Sun Jun 01 04:00:00 EDT 1986

OSTI ID:5337765

De Jonghe, L C; Rahaman, M N; Lin, M

The densification of powder compacts, containing larger pores in a fine grain, homogeneous matrix, is considered. Homogenization of the porous microstructure is possible in the intermediate stage of densification due to grain growth driven coalescence of the finer pores, while the coarser pores grow less. The conditions are identified for which homogeneity can be achieved at the end of the intermediate stage. It is found that for finer powders the initial packing perfection, normalized to the grain size, has to increase rapidly. The effects of temperature and the relative merits of monodispersed versus multidispersed powders are also discussed.

• Research Organization: Lawrence Berkeley Lab., CA (USA). Materials and Molecular Research Div.; California Univ., Berkeley (USA). Dept. of Materials Science and Mineral Engineering
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5337765
• Report Number(s): LBL-21610; CONF-860714-2; ON: DE86015202
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
CERAMICS
COMPACTS
CRYSTAL STRUCTURE
FABRICATION
GRAIN GROWTH
GRAIN SIZE
MICROSTRUCTURE
POWDERS
SINTERING
SIZE