Effect of printing parameters on mechanical properties of extrusion-based additively manufactured ceramic parts

Kedarnath Rane, Muhammad Asad Farid, Waqar Hassan, Matteo Strano

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The purpose of this study is to investigate the effect of printing parameters on the physical and mechanical properties of additively manufactured ceramics (alumina and zirconia). Sample parts were obtained by extrusion-based additive manufacturing of a ceramic-binder mixture and subsequent post-processing (debinding and sintering). Their mechanical properties (microhardness, flexural strength, toughness) were measured and correlated with the printing parameters. Part orientation is the most significant factor for microhardness and flexural strength in both ceramic materials. Parts with vertical orientation show higher hardness while horizontal samples show higher flexural strength compared to their respective counterparts. Extrusion velocity was found to be insignificant for hardness and flexural strength. However, a marginal increase in fracture toughness with the increase in the extrusion velocity was observed. The fracture toughness of additively manufactured ceramics shows an increasing trend with elastic modulus and flexural strength and a decreasing trend with hardness and sintered density.

Original languageEnglish
Pages (from-to)12189-12198
Number of pages10
JournalCeramics International
Volume47
Issue number9
Early online date22 Mar 2021
DOIs
Publication statusPublished - 1 May 2021

Keywords

  • alumina
  • fracture toughness
  • printing parameters
  • sintering
  • zirconia

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