High-Temperature Damage-Tolerance of Coextruded, Bioinspired ("Nacre-Like"), Alumina/Nickel Compliant-Phase Ceramics
Abstract
In this study, we use the coextrusion process to make high volume-fraction, nacre-like brick-and-mortar alumina structures with < 10% nickel between the ceramic bricks. We perform strength and toughness tests on these compliant-phase aluminas at temperatures up to 900 °C, both to explore the evolution of toughening with changes in the mortar plasticity and to evaluate the viability of these materials at elevated temperatures. We find that temperature plays an important role in the mechanical performance of these materials. Specifically, we observe that crack-growth resistance can be improved at higher temperatures due to enhanced ductility in the metallic mortar.
Recommended Citation
R. P. Wilkerson et al., "High-Temperature Damage-Tolerance of Coextruded, Bioinspired ("Nacre-Like"), Alumina/Nickel Compliant-Phase Ceramics," Scripta Materialia, vol. 158, pp. 110 - 115, Acta Materialia Inc, Jan 2019.
The definitive version is available at https://doi.org/10.1016/j.scriptamat.2018.08.046
Department(s)
Materials Science and Engineering
Keywords and Phrases
Biomimetic Ceramics; Crack-Growth Resistance; Extrusion; High Temperature; Nacre
International Standard Serial Number (ISSN)
1359-6462
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2019 Acta Materialia Inc, All rights reserved.
Publication Date
01 Jan 2019
Comments
This work was supported by the Mechanical Behavior of Materials Program (KC-13) at the Lawrence Berkeley National Laboratory, funded by the U.S. Department of Energy , Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under contract no. DE-AC02-05CH11231.