THE BRIQUETTING OF GRAPHITE

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Powder Met.

OSTI ID:4693429

Fidleris, V; jenkins, G M; Phillips, J W; De Vere, R H

Natural-graphite and finely ground artificial-graphite powders were subjected to improved compacting ( Shape'') techniques in an attempt to produce strong, dense materials suitable for use in atomic reactors. The densities of the natural-graphite and artificial-graphite compacts were 2.18 and 2.06 g/ml, respectively; the strengths were st run. Concent 2000 lb/in./sup 2/ in each case. Whereas Shape'' techniques improved the compact quality of briquettable materials (e.g., artificial graphite ground to 12 dia.), non-briquettable materials (e.g. +350 B.S. mesh artificial graphite) could not be satisfactorily compacted by any means. Compact quality was very sensitive to particle size and size distribution in the sub-sieve range. On the whole, compact density decreased with decreasing particle size, whereas the strength increased. An empirical relationship S = KA/sup 5/2/, between the strength (S) and the specific surface area (A) of the powder, was obtained for electro-graphite powder compacted at 10 tons/in./sup 2/. Annealing these compacts at 800 un. Concent 85% C reduced their density by 1 to 2% but increased their strength by st run. Concent 30%, The compacts were extremely anisotropic and experiments which were aimed at reducing this anisotropy are described. (auth)

• Research Organization: College of Tech., Letchworth, herts, Eng.
• NSA Number: NSA-17-022144
• OSTI ID: 4693429
• Journal Information: Powder Met., Journal Name: Powder Met. Vol. Vol: No. 11
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANISOTROPY
ANNEALING
COMPACTING
DENSITY
DISTRIBUTION
GRAIN SIZE
GRAPHITE
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
POWDERS
PRODUCTION
REACTORS
SURFACES
USES