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Development and Characterization of 3D Printable Thermite Component Materials

Journal Article · · Advanced Materials Technologies
Additive manufacturing (AM) has recently shown great promise as a means to tailor a wide range of material properties, both quasi-static and dynamic. An example of controlling the dynamic behavior is to tailor the chemical energy release rate in composite energetic materials such as thermites – which are a subset of pyrotechnics that use a metal fuel and a metal oxide as an oxidizer. Since these materials are most hazardous once finely mixed, the approach taken here is to formulate the fuel and oxidizer separately such that they can be mixed on-the-fly. The development, formulation, and characterization of two respective aqueous 3D printable inks consisting of Al and CuO are discussed. The rheological properties and ability of the material to span gaps are characterized. To demonstrate that the materials could be mixed and sustain a reaction, the inks are fed into a static mixing nozzle and extruded into a high-aspect ratio test strip. Upon drying, the material can be ignited and sustain a propagation through the part. These results present a facile, and safe, way to AM thermite which can be used for more detailed follow on studies looking at the role of architecture on the reactivity.
Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1497290
Alternate ID(s):
OSTI ID: 1479550
Report Number(s):
LLNL-JRNL--748707; 933581
Journal Information:
Advanced Materials Technologies, Journal Name: Advanced Materials Technologies Journal Issue: 12 Vol. 3; ISSN 2365-709X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Active Mixing of Reactive Materials for 3D Printing journal May 2019
3D Printing of Micro‐Architected Al/CuO‐Based Nanothermite for Enhanced Combustion Performance journal October 2019
Designer Direct Ink Write 3D‐Printed Thermites with Tunable Energy Release Rates journal December 2019
Designer Direct Ink Write 3D‐Printed Thermites with Tunable Energy Release Rates journal June 2020
Additive manufacturing and combustion performance of CL-20 composites journal November 2019

Figures / Tables (8)


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