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Local study of defects during sintering of UO2: image processing and quantitative analysis toolsGirard, Eric ...This paper describes the image analysis tools developed and used to quantify the local effects, of heterogeneities during sintering of ceramic materials applied in nuclear fuels. Specific materials, ... containing a controlled dispersion of well defined heterogeneities (dense or porous aggregates) in theceramics matrix have been prepared and sintered. In order to characterize the materials in the vicinity of these likely isolated heterogeneities, large SEM images are first acquired around heterogeneities. Image processing tools are used to segment the relevant elements of the microstructure: ceramic grains and porosity (intra- and intergranular). An analysis procedure is then developed to analyse the evolution of the main microstructure features (pore volume fraction, pore size, grain size) during sintering, with the distance tothe matrixheterogeneity interface as reference parameter. An evaluation of the anisotropy of repartition of pores and grains around the heterogeneities is also proposed. Some illustrative results are presented, which evidence a rather short range of mean interactions, and a significant rather long range of the anisotropy effect related to the matrix-heterogeneities interactions during the undidirectional compaction.Source: Image analysis & stereology : official journal of the International Society for Stereology. - ISSN 1580-3139 (Vol. 27, no. 2, jun. 2008, str. 79-85)Type of material - article, component partPublish date - 2008Language - englishCOBISS.SI-ID - 24559833
Author
Girard, Eric |
Chaix, Jean-Marc |
Valdivieso, François |
Goeuriot, Patrice |
Lechelle, Jacques
Topics
Image Processing, Computer-Assisted |
Ceramics |
Porosity |
Particle Size |
Slika, obdelava z računalnikom |
Poroznost |
Keramika |
Delec, velikost |
keramika |
uranov dioksid |
sintranje |
mikrostruktura |
poroznost
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source: Image analysis & stereology : official journal of the International Society for Stereology. - ISSN 1580-3139 (Vol. 27, no. 2, jun. 2008, str. 79-85)
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Girard, Eric | ![]() |
Chaix, Jean-Marc | ![]() |
Valdivieso, François | ![]() |
Goeuriot, Patrice | ![]() |
Lechelle, Jacques | ![]() |
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