Complex shaped boron carbides from negative additive manufacturing
Abstract
In this paper, complex shaped boron carbide with carbon (B4C/C) at near-full densities were achieved for the first time using negative additive manufacturing techniques via gelcasting. Negative additive manufacturing involves 3D printing of sacrificial molds used for casting negative copies. B4C powder distributions and rheology of suspensions were optimized to successfully cast complex shapes. In addition to demonstrating scalability of these complex geometries, hierarchically meso-porous structures were also shown to be possible from this technique. Resorcinol-Formaldehyde (RF) polymer was selected as the gelling agent and can also pyrolyze into a carbon aerogel network to act as the sintering aid for B4C. Finally, due to the highly effective distribution of in situ carbon for the B4C matrix, near-full sintered density of 97–98% of theoretical maximum density was achieved.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1438673
- Report Number(s):
- LLNL-JRNL-748179
Journal ID: ISSN 0264-1275
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials & Design
- Additional Journal Information:
- Journal Volume: 148; Journal ID: ISSN 0264-1275
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; boron carbide; gelcasting; negative additive manufacturing; resorcinol formaldehyde; sintering
Citation Formats
Lu, Ryan, Chandrasekaran, Swetha, Du Frane, Wyatt L., Landingham, Richard L., Worsley, Marcus A., and Kuntz, Joshua D. Complex shaped boron carbides from negative additive manufacturing. United States: N. p., 2018.
Web. doi:10.1016/j.matdes.2018.03.026.
Lu, Ryan, Chandrasekaran, Swetha, Du Frane, Wyatt L., Landingham, Richard L., Worsley, Marcus A., & Kuntz, Joshua D. Complex shaped boron carbides from negative additive manufacturing. United States. https://doi.org/10.1016/j.matdes.2018.03.026
Lu, Ryan, Chandrasekaran, Swetha, Du Frane, Wyatt L., Landingham, Richard L., Worsley, Marcus A., and Kuntz, Joshua D. Tue .
"Complex shaped boron carbides from negative additive manufacturing". United States. https://doi.org/10.1016/j.matdes.2018.03.026. https://www.osti.gov/servlets/purl/1438673.
@article{osti_1438673,
title = {Complex shaped boron carbides from negative additive manufacturing},
author = {Lu, Ryan and Chandrasekaran, Swetha and Du Frane, Wyatt L. and Landingham, Richard L. and Worsley, Marcus A. and Kuntz, Joshua D.},
abstractNote = {In this paper, complex shaped boron carbide with carbon (B4C/C) at near-full densities were achieved for the first time using negative additive manufacturing techniques via gelcasting. Negative additive manufacturing involves 3D printing of sacrificial molds used for casting negative copies. B4C powder distributions and rheology of suspensions were optimized to successfully cast complex shapes. In addition to demonstrating scalability of these complex geometries, hierarchically meso-porous structures were also shown to be possible from this technique. Resorcinol-Formaldehyde (RF) polymer was selected as the gelling agent and can also pyrolyze into a carbon aerogel network to act as the sintering aid for B4C. Finally, due to the highly effective distribution of in situ carbon for the B4C matrix, near-full sintered density of 97–98% of theoretical maximum density was achieved.},
doi = {10.1016/j.matdes.2018.03.026},
journal = {Materials & Design},
number = ,
volume = 148,
place = {United States},
year = {Tue Mar 13 00:00:00 EDT 2018},
month = {Tue Mar 13 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
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