A new chemical pathway towards densification of tetragonal zirconia below 900°C

Maria Isabel Rua Taborda (1) , Etienne Martin (1) , U-Chan Chung (1) , Sébastien Fourcade (1) , Christine Labrugère (2) , Dominique Michau (1) , Graziella Goglio (1) , Catherine Elissalde (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 PLACAMAT - Plateforme Aquitaine de Caractérisation des Matériaux

The recent development of low temperature sintering approaches leads to promising perspectives in terms of global optimisation of functional materials and multi-materials. These new processes mobilize different densification mechanisms and offer a tremendous flexibility in terms of chemical reactivity. In this context, we focus here on the densification of yttria stabilized zirconia (3Y-ZrO 2) at a temperature below 900°C combining a transient chemical reactivity induced during the Cold Sintering Process with diffusion mechanisms activated during the Spark Plasma Sintering. The chemistry is tuned in-situ through the presence of a hydrated zirconium carbonate whose role at each stage of the whole process is discussed. Tetragonal 3Y-ZrO 2 nanostructured ceramics were thus densified up to 92-95% below 900°C.

Mots clés: chemical reactivity; nanostructured zirconia ceramics; X-ray photoelectron spectroscopy; spark plasma sintering; cold sintering process

Domaines: Matériaux

Maria Isabel Rua Taborda, Etienne Martin, U-Chan Chung, Sébastien Fourcade, Christine Labrugère, et al.. A new chemical pathway towards densification of tetragonal zirconia below 900°C. Materialia, 2022, 24, pp.101479. ⟨10.1016/j.mtla.2022.101479⟩. ⟨hal-03730185⟩