Improvements for imaging ceramics sintering in situ in ESEM

Lucile Joly-Pottuz (1) , A. Bogner (1) , A. Lasalle (2) , Annie Malchere (1) , G. Thollet (1) , S. Deville (2)

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
2 LSFC - Laboratoire de Synthèse et Fonctionnalisation des Céramiques

Sintering of green samples of alumina produced by ice-templating was followed in situ in an environmental scanning electron microscope (ESEM) up to temperatures as high as 1375 degrees C. These alumina samples with well-defined architectures are of great interest in the field of materials science due to their high specific strength (especially in compression), low density and adaptable porosity. For the present study, they also have the advantage to exhibit an important topography, inducing interesting contrast when imaged in an ESEM. Improvements of the imaging conditions in the ESEM were essential to really follow the sintering process involving formation of necks between grains or shift of the centre of grains. This paper describes the improvements made and the results observed on the sintering process of alumina green samples processed by ice-templating.

Mots clés: ESEM; high-temperature; in-situ; sintering; ceramics

Domaines: Matériaux

Lucile Joly-Pottuz, A. Bogner, A. Lasalle, Annie Malchere, G. Thollet, et al.. Improvements for imaging ceramics sintering in situ in ESEM. Journal of Microscopy, 2011, 244 (1), pp.93-100. ⟨10.1111/j.1365-2818.2011.03512.x⟩. ⟨hal-00639510⟩