Polar studies of the sphericity degree of V/HTR nuclear fuel particles

Robert-Inacio, Frédérique; Boschet, C.; Charollais, F.; Cellier, François E.

doi:10.1016/j.matchar.2005.11.022

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…In addition to excluding the effect of the atom number of a cluster, we needed also to exclude the effect of morphology. To do so, we relied on a widely used formula to calculate sphericity [19]:…”

Section: Calculation Process and Analysis Methodsmentioning

confidence: 99%

Characterization of structure evolution of Ti–O clusters in molten iron

He¹,

Li²,

Liang³

et al. 2021

Modelling Simul. Mater. Sci. Eng.

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The interaction of Ti-O clusters with one another and with the surrounding steel melt results in changes in size and shape, which affect strength and hardness in the finished steel. We used MD simulation with two parameters that, together, describe the structure evolution of Ti-O clusters. These are: (1) the radius of pair gyration R g,p , which reflects the degree of the compactness of the cluster, and (2) the radial distribution function, which identifies the type of titanium oxide. The R g,p value, which is inversely related to compactness, increases with the growth of clusters, then decreases abruptly when transformation occurs. Once the clusters form a particular TiO x , the R g,p value remains stable until next transformation. The growth of Ti-O clusters in molten iron is divided into three stages: unstable clusters → amorphous TiO structure → amorphous Ti 3 O 5 structure. The mean critical size for the formation of amorphous TiO structure is about 7.0 Å × 9.6 Å × 21.6 Å. The critical size for the transformation of amorphous Ti 3 O 5 structure is about 8.4 Å × 11.0 Å × 36.0 Å.

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Section: Calculation Process and Analysis Methodsmentioning

confidence: 99%

Characterization of structure evolution of Ti–O clusters in molten iron

He¹,

Li²,

Liang³

et al. 2021

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…This section presents a local estimation of the circularity degree for objects in 2D [37]. The method consists in drawing the boundary of the shape under study, in polar coordinates, according to an appropriate centre.…”

Section: Polar Study Of the Boundary Of 2d Objects And Estimation Of mentioning

confidence: 99%

“…Fuel particle in 3D and polished cross-section of each layer. The presented method is based on different thresholding processes enabling to extract the kernel or one of the layers from the image [37]. Then, an Euclidean distance map is computed on the binary images, giving for the one corresponding to the kernel its diameter, and for the others, an estimation of the layer thickness.…”

Section: Aim Of the Studymentioning

confidence: 99%