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Apparent fracture toughness estimation of additively manufactured alumina from as‐printed chevron‐notched test specimens.

Authors :
Snarr, Patrick L.
Jones, Kris V.
Ghezawi, Emily F.
Wereszczak, Andrew A.
Cramer, Corson L.
Source :
Journal of the American Ceramic Society. Dec2024, p1. 5p. 1 Illustration.
Publication Year :
2024

Abstract

Ceramic vat photopolymerization (VPP) is a digital light processing method used to make additively manufactured green ceramic components that are then sintered. Despite the ever‐advancing maturation of this method's green‐state process, some of the material properties of sintered VPP‐processed ceramics are still not well defined or understood. One example is Mode I fracture toughness, <italic>K</italic>Ic. In this study, attention was devoted to <italic>K</italic>Ic measurement using net‐shape chevron‐notched bend bars that were VPP‐processed and the examination of whether valid <italic>K</italic>Ic measurement could occur by testing them. Stable crack propagation was observed in >60% of tested samples, indicated by a smooth nonlinear transition through the measured maximum force prior to final fracture. However, their results cannot yet be responsibly referred to as <italic>K</italic>Ic because of continuing violations of other prerequisites needed for valid <italic>K</italic>Ic testing. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00027820
Database :
Academic Search Index
Journal :
Journal of the American Ceramic Society
Publication Type :
Academic Journal
Accession number :
181748921
Full Text :
https://doi.org/10.1111/jace.20327