| 摘要 |
A gas- and liquid-tight joint of carbon bodies comprises a first carbon body having an opening and a second carbon body in said opening, the actual fit of said bodies, at a region of the opening extending completely around the second body, having no clearance or interference. The opening is preferably cylindrical. The fit may be a transition fit, interference fit, snug fit, winging fit, tight fit, force fit or pressure fit. At least one of said bodies may have recesses at the junction location, with a carbon filler in said recesses which is subsequently carbonized or coked to form an additional joining means. These recesses may complement each other and form an annular groove in the cylindrical opening, and may be connected by a duct or ducts to the outside of the joint. The carbon bodies may be sealed by impregnation with a synthetic resin followed by carbonization. The joints of the invention may be used in nuclear fuel elements (see Division G6). Specification 883,676 is referredALSO:A cement used as a filler in a carbon joint (see Divisions C1 and G6) comprises 80 parts wt. of graphite, 15 parts wt. of a furfuracrolein resin, 4 parts wt. of benzotrichloride and 1 part wt. of benzene sulphonic acid hydrazide. Specification 883,676 is referred to. |
