Thermal shock resistance of additively manufactured alumina

Jamieson Brechtl; Marco C. Martinez; Bola Yoon; Joseph Cesarano; Edgar Lara-Curzio; Kashif Nawaz

doi:10.1111/ijac.14887

Thermal shock resistance of additively manufactured alumina

Jamieson Brechtl, Marco C. Martinez, Bola Yoon, Joseph Cesarano, Edgar Lara-Curzio, Kashif Nawaz

Research output: Contribution to journal › Article › peer-review

Abstract

The mechanical behavior and cracking patterns of thermally-shocked additively manufactured alumina were investigated. The flexural strength of test specimens that had been heated to temperatures ranging from 200°C to 1000°C and then rapidly quenched in water was determined at ambient temperature by four-point bending. Results indicated that the surface cracking patterns had a multifractal structure and that an increase in the thermal shock temperature led to an increase in the density and uniformity of the crack network. The flexural strength results were analyzed with Weibull statistics, where the Weibull moduli for most of the thermal shock conditions tested were found to be statistically indistinguishable. It was also found that a significant decrease (∼50%) in flexural strength occurred for heating temperatures ≥300°C. The effect of the manufacturing method on cracking patterns is discussed, as well as the implication of the material behavior for practical applications of these materials.

Original language	English
Article number	e14887
Journal	International Journal of Applied Ceramic Technology
Volume	22
Issue number	1
DOIs	https://doi.org/10.1111/ijac.14887
State	Published - Jan 1 2025

Funding

This manuscript has been authored by UT-Battelle LLC under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This work was funded by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under award number DE-AR0001126. This manuscript has been authored by UT-Battelle LLC under contract no. DE-AC0500OR22725 with the U.S. Department of Energy. This manuscript has been authored by UT\u2010Battelle LLC under Contract No. DE\u2010AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid\u2010up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe\u2010public\u2010access\u2010plan ). This work was funded by the Advanced Research Projects Agency\u2010Energy (ARPA\u2010E), U.S. Department of Energy, under award number DE\u2010AR0001126. This manuscript has been authored by UT\u2010Battelle LLC under contract no. DE\u2010AC0500OR22725 with the U.S. Department of Energy.

Keywords

additive manufacturing
alumina
mechanical properties
multifractal analysis
thermal shock

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10.1111/ijac.14887

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title = "Thermal shock resistance of additively manufactured alumina",

abstract = "The mechanical behavior and cracking patterns of thermally-shocked additively manufactured alumina were investigated. The flexural strength of test specimens that had been heated to temperatures ranging from 200°C to 1000°C and then rapidly quenched in water was determined at ambient temperature by four-point bending. Results indicated that the surface cracking patterns had a multifractal structure and that an increase in the thermal shock temperature led to an increase in the density and uniformity of the crack network. The flexural strength results were analyzed with Weibull statistics, where the Weibull moduli for most of the thermal shock conditions tested were found to be statistically indistinguishable. It was also found that a significant decrease (∼50%) in flexural strength occurred for heating temperatures ≥300°C. The effect of the manufacturing method on cracking patterns is discussed, as well as the implication of the material behavior for practical applications of these materials.",

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AU - Cesarano, Joseph

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AU - Nawaz, Kashif

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Thermal shock resistance of additively manufactured alumina

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