Figure 2
From: High wettability of liquid caesium iodine with solid uranium dioxide
Dihedral angle method imagery and measurements. (a) SEM image of the surface of a UO2 pellet used in the dihedral angle method test. Scale bar is 10 μm. (b) An example of dihedral angle measurements depicted schematically and photographically. The SEM picture is from polycrystalline CeO2. (c) The grain boundary-angle distribution. Left: during liquid CsI penetration; and right: with unpenetrated UO2 pellets. The samples were at the maximum temperature of 973 K for 48 h. Here, the vertical red bars present experimental data and the solid black curves depict Gaussian fitting data. The mean values were calculated by fitting a Gaussian function. The selected dihedral angles exhibited the highest appearance frequencies. The standard deviation was approximately 11°.
