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Tensile Tests of Miniature Fiber Reinforced Ceramic Composites for Screening Process-Property Relations

Gonczy, S. T. and Sprandel, R. C. and Faber, K. T. (1997) Tensile Tests of Miniature Fiber Reinforced Ceramic Composites for Screening Process-Property Relations. In: Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A. Ceramic Engineering and Science Proceedings. No.18-3. Wiley , Hoboken, NJ, pp. 729-736. ISBN 9780470375495. https://resolver.caltech.edu/CaltechAUTHORS:20140912-114830027

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Abstract

Mechanical testing of 2-D and 3-D composites in bar geometries is material, time, and cost intensive. As an alternative low-cost, rapid-fabrication geometry, multifilament Nicalon™ (with pyrolytic carbon-coating) tows were densified with the preceramic polymer (Blackglas™) technology to form single tow ceramic ”mini-composites”. Using modified ASTM tow testing methods, the Blackglas-Nicalon(C) mini-composites were tested in tension at ambient temperatures. The ceramic mini-composites had fibrous failure with linear load-deflection curves and mean breaking loads of 70 N. Gage length (1, 2.5 & 5 cm) effects on breaking loads were minimal. The coefficient of variation (CoV) for the ceramic mini-composites was 19% as compared to a 10% CoV for earlier tensile tests on Blackglas-Nicalon 2-D fabric composite bars. Results were compared to tensile tests of epoxy-Nicalon tows. Breaking strengths of the ceramic mini-composites were roughly 30% of the breaking strengths of the epoxy-Nicalon composites. Oxidation at 600° and 1000°C for 1 hour embrittled the Blackglas-Nicalon (C) composites and reduced the breaking load to values of 42 N and 17 N, respectively.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/9780470294437DOIBook
http://dx.doi.org/10.1002/9780470294437.ch79DOIChapter
http://onlinelibrary.wiley.com/doi/10.1002/9780470294437.ch79/summaryPublisherChapter
ORCID:
AuthorORCID
Faber, K. T.0000-0001-6585-2536
Additional Information:Copyright © 1997 The American Ceramic Society. The authors would like to thank Mr. Rick Jones of Dow Corning and Dr. Jack Sikonia of AlliedSignal for the contribution of Nicalon tow and Blackglas resin. Dr. Gregory Morscher of NASA-Lewis, Mr. Daniel Boss of BIRL, and Dr. Edgar Lara-Curzio of ORNL provided valuable information and insights on the experimental details of the mini-tow test methods. Support for R. C. Sprandel was provided by the National Science Foundation through the Research Experiences for Science Teachers Program at Northwestern University.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Subject Keywords:composites; preceramic polymer; fibrous failure; load-deflection; tensile tests
Series Name:Ceramic Engineering and Science Proceedings
Issue or Number:18-3
Record Number:CaltechAUTHORS:20140912-114830027
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140912-114830027
Official Citation:Gonczy, S. T., Sprandel, R. C. and Faber, K. T. (1997) Tensile Tests of Miniature Fiber Reinforced Ceramic Composites for Screening Process-Property Relations, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch79
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49665
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:15 Sep 2014 20:42
Last Modified:03 Mar 2020 13:01

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