Novel equipment for the study of the compaction of fine powders
- National Inst. of Standards and Technology, Gaithersburg, MD (United States). Ceramics Division
This paper describes a highly specialized system for studies of time-dependent compaction of nano-size and other fine-size powders under a variety of atmospheres and at temperatures ranging from 77 to 1,000 K. the system incorporates a 10,000 kg screw-driven press with a piston-cylinder type of die and can produce cylindrical powder compacts, 3mm in diameter and of various thicknesses, utilizing pressures up to 3 GPa. The system is computer-controlled and permits measurements of the sample volume with an uncertainty of 0.07 mm[sup 3] and, after appropriate calibration, can determine the rate and degree of densification of the compacting powder as pressure is applied. To illustrate its capabilities, the system was used to study the densification of several powders, including nano-size [gamma]-Al[sub 2]O[sub 3], submicrometer 95% [alpha]-Si[sub 3]N[sub 4], RbBr, and KCl. The results obtained on RbBr and KCl, used for calibration and testing of the equipment, are in good agreement with previously published data for these materials.
- OSTI ID:
- 7114841
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:4; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BROMIDES
BROMINE COMPOUNDS
CERAMICS
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
COMPACTING
DATA
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PNICTIDES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POWDERS
RUBIDIUM BROMIDES
RUBIDIUM COMPOUNDS
SILICON COMPOUNDS
SILICON NITRIDES
SIZE