Investigation by neutron diffraction of texture induced by the cooling process of zirconia refractories

C. Patapy; Fanny Gouraud; Marc Huger; René Guinebretière; B. Ouladiaff; D. Chateigner; Thierry Chotard

Investigation by neutron diffraction of texture induced by the cooling process of zirconia refractories

C. Patapy ¹ Fanny Gouraud ² Marc Huger ² René Guinebretière ³ B. Ouladiaff ⁴ D. Chateigner ⁵ Thierry Chotard ^{2, *}

* Auteur correspondant

1 LMDC - Laboratoire Matériaux et Durabilité des constructions [Toulouse]

2 Axe 1 : procédés céramiques

SPCTS - Science des Procédés Céramiques et de Traitements de Surface

3 SPCTS-AXE3 - Axe 3 : organisation structurale multiéchelle des matériaux

SPCTS - Science des Procédés Céramiques et de Traitements de Surface

4 ILL - Institut Laue-Langevin

5 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

Abstract : New fused cast refractories with a high content of zirconia have been developed to face corrosion in glass furnaces. The controlled cooling process is responsible for thermal gradients. So, thermal mismatches appear between core and edge zones of blocks. Besides, the multiphasic nature of ZrO2 based refractories is associated to thermal mismatches during cooling. Finally, the expansive transformation of ZrO2 can lead to stress generation.This paper is an application of neutron diffraction to study texture generated during the cooling process of zirconia based materials. In fact, it is shown that ZrO2 crystallographic variants have particular crystallographic texture regarding the main direction of the thermal gradient in the block. It was hypothesized that a selection of crystallographic variants could be done depending on the field stress. Tensile-compressive tests at high temperature have been done, to reproduce stress environment during the transformation of zirconia.

Keywords : Refractories Texture Variants Cooling process Neutron diffraction

Type de document :

Article dans une revue

Domaine :

Sciences de l'ingénieur [physics] / Matériaux

Sciences de l'ingénieur [physics] / Mécanique [physics.med-ph] / Mécanique des matériaux [physics.class-ph]

Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-01102574
Contributeur : Thierry Chotard <>
Soumis le : mardi 13 janvier 2015 - 10:28:03
Dernière modification le : vendredi 11 octobre 2019 - 20:22:55

Investigation by neutron diffraction of texture induced by the cooling process of zirconia refractories

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Investigation by neutron diffraction of texture induced by the cooling process of zirconia refractories

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