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Freeform 3D Ice Printing (3D-ICE) at the Micro Scale.

Akash Garg1, Saigopalakrishna S Yerneni2, Phil Campbell2

  • 1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15232, USA.

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Summary

Researchers developed a 3D ice printing (3D-ICE) method for fast, accurate fabrication of complex ice structures. This technique uses controlled water droplet freezing for micro-scale resolution, enabling novel applications.

Keywords:
cryogenic printingfree-form printinghierarchical channelsice printingice templatingmicro-castingout-of-plane printing

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Cryogenics

Background:

  • Water's unique properties make it suitable for 3D printing ice structures.
  • Existing methods lack speed and micro-scale resolution for complex ice fabrication.

Purpose of the Study:

  • Introduce a novel freeform 3D ice printing (3D-ICE) process.
  • Achieve high-speed, reproducible fabrication of ice structures with micro-scale resolution.
  • Demonstrate the capability for complex and overhang geometries.

Main Methods:

  • Utilized a drop-on-demand water deposition system onto a -35°C platform.
  • Controlled ice structure dimensions and geometry via droplet frequency modulation and stage motion.
  • Employed a freeform approach, eliminating layer-by-layer construction and support structures.

Main Results:

  • Successfully fabricated complex, freeform ice structures with overhangs and micro-scale features (down to 50 µm).
  • Achieved smooth surfaces, circular cross-sections, and branched hierarchical structures.
  • Demonstrated the use of ice templates for creating resin parts with intricate internal features.

Conclusions:

  • The 3D-ICE process offers a high-speed, reproducible method for fabricating intricate ice structures.
  • This technique opens possibilities for applications in microfluidics, biomedical devices, soft electronics, and art.
  • The ability to create sacrificial ice geometries facilitates the production of complex resin parts.