Communication Dans Un Congrès Année : 2022

Microwave sintering of zirconia bulk and lattice samples shaped by DLP-based stereolithography

Résumé

Nowadays, shaping by additive manufacturing and rapid sintering processes are of particular interest to produce technical ceramics with reduced time and energy consumption. Additive manufacturing processes enable to overcome many different issues of conventional shaping processes, especially fabricating complex geometries. Among them, stereolithography is based on the layer-by-layer polymerization of a photosensitive resin. It was highly studied to produce oxide ceramics such as alumina or zirconia. Rapid sintering such as microwave (MW) sintering is interesting to reduce the duration of thermal treatments. MW sintering is a fast volumetric heating of the samples by direct MW/materials interaction. It leads to dense samples with fine microstructures. The combination of shaping by additive manufacturing and MW sintering has been rarely studied these last years. Therefore, the aim of this study is to couple these two processes to produce zirconia samples. For this purpose, bulk and lattice-type pellets were printed with Digital Light Processing (DLP) based stereolithography process. A ready-to-use 3 mol% yttria tetragonal zirconia (3Y-TZP) slurry was used. The sample were then submitted to a thermal debinding in a conventional (CV) furnace. The printed samples were sintered in a MW multimode cavity. CV sintering was also applied for comparison. Highly dense samples with fine microstructures were obtained with MW sintering with shorter thermal cycles in comparison with CV sintering (i.e., higher heating rates and lower holding times). MW sintering of bulk and lattice-type samples led to a homogeneous microstructure.

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Dates et versions

hal-04907494 , version 1 (23-01-2025)

Identifiants

  • HAL Id : hal-04907494 , version 1

Citer

Nouhaila Khalile, Clémence Petit, Bartolomeo Coppola, Paola Palmero, Christophe Meunier, et al.. Microwave sintering of zirconia bulk and lattice samples shaped by DLP-based stereolithography. ECerS17 - 17th Conference of the European Ceramic Society, Jul 2022, Cracovie, Poland. ⟨hal-04907494⟩

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