3D Print - OSTI GOV

2022 roadmap on 3D printing for energy

"To ensure a smooth transition to a renewable future energy scenario, energy harvesting using solar cells or windmills, or even hydrogen storage in batteries, supercapacitors, or hydrogen must be developed and eventually deployed. " The ability to achieve highly effective and cost-effective technologies, which can increase the competitiveness of clean energy technologies against fossil fuels, is enhanced by additive manufacturing and digitalization of the industrial processes. The present roadmap in this frame highlights the tremendous promise of 3D printing as a new way to completely automate the manufacturing of energy components that are not computer generated. In addition, this essay offers numerous tips for maximising the effectiveness and efficiency of the next generation of 3D printed computers for the energy transition while also minimizing the use of essential raw materials. ".

Source link: https://www.osti.gov/biblio/1863283

Methods and systems for 3D printing with powders

"A method of printing a three-dimensional article can include spraying a dry build material powder onto a building platform and then heating the dry build material powder. " "The dry build material powder can be heated to a temperature above the softening point temperature so that the dry build material powder adheres to the building platform. ".

Source link: https://www.osti.gov/biblio/1860160

Soft elasticity optimises dissipation in 3D-printed liquid crystal elastomers

"Soft-elasticity in monodomain liquid crystal elastomers is intended for impact-absorbing applications where strain energy is ideally retained at steady strain. " We use direct-ink writing 3D printing to produce bulk monodomain LCE units and investigate their compressive softness over 8 decades of strain rate. The monodomain soft-elastic LCE dissipated 45% of strain energy at quasi-static rates, while comparativor materials dissipated less than 20%. Soft-elasticity testing reveals soft-elasticity as a likely means for effectively minimizing the effects of earthquakes u2013, with soft elastic LCEs delivering a Gadd Severity Index 40% lower than a similar isotropic elastomer.

Source link: https://www.osti.gov/biblio/1834143

Flexible 3D printed silicones for gamma and neutron radiation shielding

"Here, resin formulations for direct ink write additive manufacturing were developed for rapid customization of shield radiation signatures consisting of a variety of gamma radiation and neutron energies in a variety of applications. " This research demonstrates the success of a tunable resin for additively manufactured, flexible shielding material, which can be used in demanding radiation environments associated with nuclear materials.

Source link: https://www.osti.gov/biblio/1788415

Shape evolution and growth mechanisms of 3D-printed nanowires

"3D printing of nanowires using Focused Electron Beam Induced Deposition" allows direct-write fabrication of intricate 3D objects on virtually every substrate surface. The dimensions of constituent nanowires determine the physical characteristics of such freestanding structures. We explore the thicknesses and widths of freestanding segments as a result of the inclination angles, primary electron energy, beam currents, and precursor flux in this report. Basing's effects are clarified" thanks to detailed scanning electron microscopy measurements and Monte Carlo/Finite Differences simulations.

Source link: https://www.osti.gov/biblio/1817549

Properties of SiC-Si made via binder jet 3D printing of SiC powder, carbon addition, and silicon melt infiltration

"We present the physical and mechanical characteristics of ceramic composite materials made by binder jet 3D printing with silicon carbide powders, along with phenolic resin infiltration and pyrolysis to produce carbon, as well as a final reactive silicon melt infiltration step in this series. However, declining returns were obtained after more than two phenolic resin infiltration and pyrolysis cycles were suspended after more than two phenolic resin infiltration and pyrolysis cycles were concluded after more than two phenolic resin infiltration and pyrolysis cycles were completed after the development of SiC, resulting in reaction choking and residual-free carbon and porosity. ".

Source link: https://www.osti.gov/biblio/1813244

On the additive manufacturing (3D printing) of viscoelastic materials and flow behavior: From composites to food manufacturing

The main aim of this research paper, "Furthermore," the main aim of this review article, is focused on the viscoelastic behavior of 3D printing materials at ambient temperatures, which are not typically under melt-flow or higher temperatures. " The initial section discusses the basic principles of viscosity and viscoelastic phenomena, with a focus on the most suitable conditions a viscous material should be able to print before 3D-printing. Several examples of structures constructed from viscoelastic materials through 3D-printing are also extensive, as well as the various curing methods for various printed objects or models. ".

Source link: https://www.osti.gov/biblio/1820759

Beam Hardening Artifact Reduction in X-Ray CT Reconstruction of 3D Printed Metal Parts Leveraging Deep Learning and CAD Models

However, XCT images can be difficult due to artifacts produced by standard reconstruction techniques, such as pores and cracks, which is crucial to ensuring the quality of the parts being printed. Also report promising preliminary results of extending the deep networks developed using CAD models to experimental results obtained from the XCT of an AM jet-engine turbine blade blade's XCT data. ".

Source link: https://www.osti.gov/biblio/1769244

Intensity modulated Ir-192 brachytherapy using high-Z 3D printed applicators

"Gynecologic cancers are often asymmetric, but new Ir-192 brachytherapy techniques have only limited radial modulation. " To narrow down the search space, a 2D calculation algorithm was developed to find applicator designs that can change between full dose and less than 50% dose, at the dimensions of the urethra. ISO 10993-approved biocompatible plastics and 3D printable tungsten-loaded plastics were tested in 3D printing techniques using ISO 10993 standardized biocompatible plastics and 3D printable tungsten-loaded plastics. The shielded applicator designs, which were tested here, allow for reduction of the dose by over 50% at 5 mm from the applicator surface in desirable areas, while still allowing for a symmetric dose with isodose line deviations less than 0. 5 mm from circular. Both TOPAS Monte Carlo and Acuros BV studies show that significant dose shaping and organ at risk sparing can be achieved without significantly compromising the strategy in regions that require the full dose. ".

Source link: https://www.osti.gov/biblio/1656554

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