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Microstructure and mechanical properties of acicular mullite

Hsiung, C.-H. H. and Pyzik, A. J. and De Carlo, F. and Xiao, X. and Stock, S. R. and Faber, K. T. (2013) Microstructure and mechanical properties of acicular mullite. Journal of the European Ceramic Society, 33 (3). pp. 503-513. ISSN 0955-2219.

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Porous acicular mullite (ACM) ceramics are known to be mechanically robust even at high porosities. This study was undertaken to better understand what aspects of acicular mullite's needle-like microstructure affect the overall mechanical properties and how the microstructure might be modified to improve mechanical performance. ACMs with a variety of porosities, pore sizes, and needle diameters were produced, and their elastic moduli, flexure strengths, and fracture toughnesses were measured. Three-dimensional image analysis was an invaluable tool in determining the needle diameters of these complex 3D network structures. It was found that porosity was the most dominant factor in determining the mechanical properties of ACM and that its behavior could be described using the Gibson–Ashby foam model.

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Faber, K. T.0000-0001-6585-2536
Additional Information:© 2012 Elsevier Ltd. Received 3 May 2012; received in revised form 16 September 2012; accepted 21 September 2012; Available online 12 October 2012. This work was funded by a research grant from The Dow Chemical Company. ACM processing was carried out at The Dow Chemical Company, and the authors would like to thank Kwanho Yang, Chan Han, Janet Goss, Sherry Allen, and Nick Shinkel from Core R&D of The Dow Chemical Company for their help and expertise. Mechanical testing was done at the MRSEC supported CLAMMP facility at Northwestern University (NSF DMR-0520513) and Professor Waltrud Kriven’s laboratory at the University of Illinois at Urbana-Champaign. SEM microscopy was performed in the EPIC and Keck-II facilities of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University. Test sample preparation was carried out at the OMM facility of Northwestern University. Use of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357. Finally, a special thanks to David Haberthür, Julie Fife, and Begum Gulsoy for their help and training in 3D image analysis.
Funding AgencyGrant Number
Dow Chemical CompanyUNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
State of IllinoisUNSPECIFIED
Northwestern UniversityUNSPECIFIED
Department of Energy (DOE)DE-AC02-06CH11357
Subject Keywords:Mechanical properties; Mullite; X-ray tomography; Porous ceramics.
Issue or Number:3
Record Number:CaltechAUTHORS:20140709-144848100
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Official Citation:Hsiung, C. H. H., Pyzik, A. J., De Carlo, F., Xiao, X., Stock, S. R., & Faber, K. T. (2013). Microstructure and mechanical properties of acicular mullite. Journal of the European Ceramic Society, 33(3), 503-513. doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47112
Deposited By: Joanne McCole
Deposited On:09 Jul 2014 22:31
Last Modified:03 Mar 2020 13:01

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