A PROCESS FOR MAKING GRAPHITE LESS PERMEABLE TO GASES AT HIGH TEMPERATURES

Technical Report · Fri Feb 01 04:00:00 EST 1963

OSTI ID:4702918

Tully, Jr, G R; Disselhorst, B F

A process for treating commercial graphite to lower its permeability to the order of 1 x 10/sup -5/ cm/sup 2//sec by a series of impregnations with a furfuryl alcohol type of monomer is described. Graphites with maximum pore diameters up to 40 mu , as measured by mercury porosimetry, can be treated. The impregnant is heated to> 2650 deg C in the process, so the treated material is suitable for high-temperature applications, as in the core of a nuclear reactor. Details of the experimental procedure and equipment and the effect of the process on the properties of the graphite are given. Tubes of HLM-85 graphite, 4 ft long and 3 1/2 in. in outside diameter with a wall thickness of 3/8 in., were treated to permeabilities of < 1 x 10/sup -5/ cm/sup 2//sec by the process. (auth)

• Research Organization: General Atomic Div., General Dynamics Corp., San Diego, Calif.
• NSA Number: NSA-17-024623
• OSTI ID: 4702918
• Report Number(s): GA-2318
• Country of Publication: United States
• Language: English

Related Subjects

ALCOHOLS
GASES
GRAPHITE
HIGH TEMPERATURE
IMPREGNATION
POROSITY
REACTOR CORE
REACTOR TECHNOLOGY
TUBES
USES