Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 44, Issue 8, Pages 2598-2607Publisher
SPRINGER
DOI: 10.1007/s11664-015-3687-7
Keywords
Polymer composites; material testing; fracture analysis; mechanical properties; 3D printing
Categories
Funding
- America Makes Manufacturing Initiative
- State of Texas Emerging Technology Fund
- National Aeronautics and Space Administration [NNX13AB53G]
- AFOSR YIP [FA9550-14-1-0260]
- National Science Foundation [0823864, 0925220]
- state of Arizona under TRIF
- Intelligence Community Postdoctoral Research Fellowship Program through Office of the Director of National Intelligence
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1408271] Funding Source: National Science Foundation
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Material-extrusion three-dimensional (3D) printing has recently attracted much interest because of its process flexibility, rapid response to design alterations, and ability to create structures on-the-go. For this reason, 3D printing has possible applications in rapid creation of space-based devices, for example cube satellites (CubeSat). This work focused on fabrication and characterization of tungsten-doped polycarbonate polymer matrix composites specifically designed for x-ray radiation-shielding applications. The polycarbonate-tungsten polymer composite obtained intentionally utilizes low loading levels to provide x-ray shielding while limiting effects on other properties of the material, for example weight, electromagnetic functionality, and mechanical strength. The fabrication process, from tungsten functionalization to filament extrusion and material characterization, is described, including printability, determination of x-ray attenuation, tensile strength, impact resistance, and gigahertz permittivity, and failure analysis. The proposed materials are uniquely advantageous when implemented in 3D printed structures, because even a small volume fraction of tungsten has been shown to substantially alter the properties of the resulting composite.
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