Additive manufacturing of 3D yttria-stabilized zirconia microarchitectures

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • J.P. Winczewski
  • S. Gabel
  • D. Maestre
  • Benoit Merle
  • J.G.E. Gardeniers
  • A. Susarrey-Arce

Externe Organisationseinheiten

  • Universität Twente
  • Friedrich-Alexander-Universität Erlangen-Nürnberg
  • Universidad Complutense de Madrid
  • Universität Kassel

Abstract

The additive manufacturing (AM) of yttria-stabilized zirconia (YSZ) microarchitectures with sub-micrometer precision via two-photon lithography (TPL), utilizing custom photoresin containing zirconium and yttrium monomers is investigated. YSZ 3D microarchitectures can be formed at low temperatures (600 °C). The low-temperature phase stabilization of ZrO 2 doped with Y 2O 3 demonstrates that doping ZrO 2 with ≈ 10 mol% Y 2O 3 stabilizes the c-ZrO 2 phase. The approach does not utilize YSZ particles as additives. Instead, the crystallization of the YSZ phase is initiated after printing, i.e., during thermal processing in the air at 600 °C – 1200 °C for one and two hours. The YSZ microarchitectures are characterized in detail. This includes understanding the role of defect chemistry, which has been overlooked in TPL-enabled micro-ceramics. Upon UV excitation, defect-related yellowish-green emission is observed from YSZ microarchitectures associated with intrinsic and extrinsic centers, correlated with the charge compensation due to Y 3+ doping. The mechanical properties of the microarchitectures are assessed with manufactured micropillars. Micropillar compression yields the intrinsic mechanical strength of YSZ. The highest strength is observed for micropillars annealed at 600 °C, and this characteristic decreased with an increase in the annealing temperature. The deformation behavior gradually changes from ductile to brittle-like, correlating with the Hall–Petch strengthening mechanism.

Details

OriginalspracheEnglisch
Aufsatznummer112701
Seitenumfang11
FachzeitschriftMaterials and Design
Jahrgang238.2024
AusgabenummerFebruary
DOIs
StatusVeröffentlicht - 1 Feb. 2024