Open AccessHIGH-TEMPERATURE COMPATIBILITY OF Al$sub 2$O$sub 3$-, BeO-, AND METAL- COATED UO$sub 2$ PARTICLES WITH GRAPHITE AND COKE
Author(s) -
A.F. Gerds,
A.K. Smalley
Publication year - 1960
Language(s) - English
Resource type - Reports
DOI - 10.2172/4115290
Subject(s) - materials science , graphite , nickel , metal , oxide , coke , metallurgy , petroleum coke , niobium , alloy , coating , composite material , chromium , argon , chemistry , organic chemistry
The compatibility of carbon and graphite matrices with UO/sub 2/ particles coated with Al/sub 2/O/sub 3/, BeO, nickel, niobium, and nickel- chromium alloy was investigated at several temperatures up to 3OOO deg F in flowing helium. Two different carbonaceous fillers and binders were used. As expected, the 2 to 8- mu metal coatings were badly damaged by reaction with carbon at temperatures as low as 17OO deg F. Both oxide coatings were completely destroyed after 6 hr at 3000 deg F. Considerable reaction between the matrices and.Ai/sub 2/O/sub 3/ and BeO coatings occurred during 1000 hr at 2500 deg F. Coating damage was more severe in surface particles than in particles located inside the specimens. The graphite filler and pitch binder combination used in this study was less reactive than combinations containing coke filler or resin binder. (auth