Premium
Grain Growth in Sintered Uranium Dioxide: I, Equiaxed Grain Growth
Author(s) -
MacEWAN J. R.
Publication year - 1962
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.1151-2916.1962.tb11026.x
Subject(s) - equiaxed crystals , grain growth , grain size , uranium dioxide , materials science , annealing (glass) , metallurgy , uranium , atmospheric temperature range , metal , lattice constant , mineralogy , thermodynamics , chemistry , microstructure , physics , diffraction , optics
Grain growth was investigated in a UO 2 sinter of 94%) theoretical density over the temperature range 1555° to 2440°C. The results were in close, but not exact, agreement with a theoretical expression describing grain growth with a poly‐crystalline matrix. For the material studied the mean grain diameter D (μm) after annealing for t hours at a temperature T (°K) was given by the equationwhere D 0 and K 0 are, respectively, the initial grain size and a proportionality constant. Uranium metal was found in all specimens annealed above 2000°C. This was taken as evidence that the UO 2 lattice can be oxygen‐deficient at high temperatures.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom