BERNARD, Dominique; GENDRON, Damien; HEINTZ, Jean-Marc; BOURDINEAUD-BORDÈRE, Sylvie; ETOURNEAU, Jean

doi:10.1016/j.actamat.2004.09.027

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BERNARD, Dominique
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GENDRON, Damien
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

HEINTZ, Jean-Marc
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Acta Materialia. 2005, vol. 53, n° 1, p. 121-128

Elsevier

Résumé en anglais

X-ray computed microtomography (XCMT) has been applied to ceramic samples of different materials to visualise, for the ﬁrst time at this scale, real 3D microstructural evolutions during sintering. Using this technique, it has been possible to follow the whole sintering process of the same grains set. Two materials have been studied; a glass powder heat treated at 700 C and a crystallised lithium borate (Li6Gd(BO3)3) powder heat treated at 720 °C. XCMT measurements have been done after different sintering times. For each material, a sub-volume was individualised and localised on the successive recordings and its 3D images numerically recon¬structed. Description of the three-dimensional microstructures evolution is proposed. From the 3D experimental data, quantitative evolutions of parameters such as porosity and neck size are presented for the glass sample. Possibilities offered by this technique to study complex sintering processes, as for lithium borate, are illustrated.< Réduire

Mots clés en anglais

Sintering

Microstructure

Non-destructive testing

Grain interface

X-ray computed microtomography

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First direct 3D visualisation of microstructural evolutions during sintering through X-ray computed microtomography

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