COTTRINO, Sandrine; GAUDISSON, Thomas; PAILHES, Stéphane; FERRARA, Emanuela Archina; MISHRA, S.; DANIELE, S.; MÉZOUAR, Mohamed; LARGETEAU, Alain; LE GODEC, Yann; LE FLOCH, Sylvie

doi:10.1016/j.jeurceramsoc.2022.11.037

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

COTTRINO, Sandrine
Matériaux, ingénierie et science [Villeurbanne] [MATEIS]

GAUDISSON, Thomas
Institut Lumière Matière [Villeurbanne] [ILM]

PAILHES, Stéphane
iLM - Transport, Nanomagnétisme et Matériaux pour l'Énergie [iLM - ENERGIE]

Langue

Article de revue

Ce document a été publié dans

Journal of the European Ceramic Society. 2023, vol. 43, n° 7, p. 2783-2793

Elsevier

Résumé en anglais

We investigated the effect of very high pressure on the sintering temperature, phase transition and the grain growth during Spark Plasma Sintering (SPS) of a 15 nm TiO2 nanopowder. Using in situ synchrotron X-ray diffraction during sintering at 1.5 and 3.5 GPa, we followed the evolution of the crystalline phases and the crystallite size as a function of temperature. In comparison, in the laboratory, SPS experiments were performed on two original facilities: A Paris-Edinburgh press and a high-pressure module adapted to standard SPS equipment. We studied the effect of the pressure on the sintering in the range 76 MPa to 3.5 GPa. We have shown that highly dense nanostructured ceramics can be prepared under very high pressure at low sintering temperatures. At 1 GPa, we limited the grain growth to an average size of 233 nm by heating at only 560 °C, and achieved a relative density of 98 %.< Réduire

Mots clés en anglais

Nanopowder TiO2

In situ X-ray diffraction

High-pressure spark plasma sintering

Grain growth

Activation energy

Métadonnées

Licence d’utilisation du document

In situ X-ray diffraction study of a TiO2 nanopowder Spark Plasma Sintering under very high pressure

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche