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Thermoreversible gelcasting: A novel ceramic processing technique

Montgomery, John K. and Drzal, Peter L. and Shull, Kenneth R. and Faber, K. T. (2002) Thermoreversible gelcasting: A novel ceramic processing technique. Journal of the American Ceramic Society, 85 (5). pp. 1164-1168. ISSN 0002-7820. doi:10.1111/j.1151-2916.2002.tb00239.x. https://resolver.caltech.edu/CaltechAUTHORS:20140908-181321764

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Abstract

A new ceramic processing method, thermoreversible gelcasting (TRG), has been developed. The method uses a gelation process that can be reversed multiple times. Two Al_2O_3 systems have been explored with the use of a specific triblock copolymer to form a binding gel network. The mixture becomes a free-flowing liquid on heating above 60°C. However, on cooling below 60°C, the slurry instantaneously transforms to a physical gel. This process can be reversed easily (essentially with an infinite processing time window) while the solvent is present in the system, which is advantageous when trying to produce high-quality dense pieces if initial casting irregularities occur. Near-theoretically dense specimens have been produced with properties consistent with reported values of high-density Al_2O_3.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1151-2916.2002.tb00239.xDOIArticle
http://onlinelibrary.wiley.com/doi/10.1111/j.1151-2916.2002.tb00239.x/abstractPublisherArticle
ORCID:
AuthorORCID
Faber, K. T.0000-0001-6585-2536
Additional Information:© 2002 The American Ceramic Society. Manuscript No. 187581. Received July 17, 2001; approved January 9, 2002. Supported by the NSF through DMR-9800257 (JKM and KTF) and DMR-9975468 (PLD and KRS). The authors thank Daniel Harrington for performing the TGA measurements, and Jennifer Su and David Hovis for providing publication suggestions.
Funders:
Funding AgencyGrant Number
NSFDMR-9800257
NSFDMR-9975468
Issue or Number:5
DOI:10.1111/j.1151-2916.2002.tb00239.x
Record Number:CaltechAUTHORS:20140908-181321764
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140908-181321764
Official Citation:Montgomery, J. K., Drzal, P. L., Shull, K. R. and Faber, K. T. (2002), Thermoreversible Gelcasting: A Novel Ceramic Processing Technique. Journal of the American Ceramic Society, 85: 1164–1168. doi: 10.1111/j.1151-2916.2002.tb00239.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49385
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Sep 2014 14:42
Last Modified:10 Nov 2021 18:43

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