Open AccessALUMINA COATING OF UO$sup 2$ SHOT BY HYDROLYSIS OF ALUMINUM CHLORIDE VAPOR
Author(s) -
M.F. Browning,
N. D. Veigel,
T.E. Cook,
W.S. Diethorn,
J.M. Blocher
Publication year - 1960
Language(s) - English
Resource type - Reports
DOI - 10.2172/4121300
Subject(s) - nitric acid , materials science , coating , chloride , aluminium , fluidized bed , uranium , leaching (pedology) , hydrolysis , fission products , temperature cycling , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , radiochemistry , metallurgy , chemistry , composite material , thermal , chromatography , organic chemistry , environmental science , soil science , soil water , physics , meteorology
Uniform, dense coatings of alumina about 5 to 150 mu thick were applied to uranium dioxide particles 44 to 350 mu in diameter by hydrolysis of aluminum chloride vapor in a fluidized bed of the particles at 1830 deg F. The coated particles were resistant to nitric acid leaching, to oxidation in 1830 deg F air, and to thermal cycling from 6OO to 2500 deg F. After low neutron exposures, the coated particles showed excellent fission-gas retention at temperatures up to 2400 deg F in inert gas. Although not optimized in the study, the coating process appears to have commercial feasibility. (auth