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Phase Relations in the System Uranium—Carbon—Oxygen
Author(s) -
STOOPS ROBERT F.,
HAMME JOHN V.
Publication year - 1964
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1964.tb15655.x
Subject(s) - phase diagram , oxygen , carbon monoxide , carbon fibers , ternary operation , uranium , inert gas , ternary numeral system , lattice constant , lattice (music) , phase (matter) , solid solution , chemistry , analytical chemistry (journal) , compounds of carbon , materials science , metallurgy , chemical reaction , diffraction , catalysis , physics , organic chemistry , composite number , computer science , acoustics , optics , composite material , programming language
The ternary system U‐C‐O was investigated and a diagram is given expressing the phase relations in specimens which were reacted at 1800°C in vacuum or in inert atmospheres and furnace cooled. A U(C,O) single‐phase area exists in this diagram. The limit of substitutional solid solution of oxygen atoms for carbon atoms in UC is 12.5 at.%, which means that only 25% of the carbon atoms in UC can be replaced by oxygen atoms. The oxygen‐saturated UC phase, U(C 0.75 O 0.25 ), has a lattice parameter of 4.953 ± 0.001 A. The carbon monoxide partial pressures in equilibrium with this phase were determined for temperatures between 1705° and 1855°C.