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Related Experiment Video

Updated: Jul 11, 2025

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Inverted laser sintering of metal powders.

John Whitehead1, Hod Lipson2

  • 1Department of Mechanical Engineering, Columbia University, New York, USA. jdw2199@columbia.edu.

Scientific Reports
|November 17, 2023
PubMed
Summary

This study showcases inverted laser sintering for metal part manufacturing. This novel technique enables multi-material metallic component fabrication without a powder bed, advancing additive manufacturing capabilities.

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Laser Processing

Background:

  • Traditional metal additive manufacturing often relies on powder beds, which can limit design freedom and material combinations.
  • Developing new methods for fabricating complex metallic parts is crucial for technological advancement.

Purpose of the Study:

  • To demonstrate the efficacy of the inverted laser sintering process for manufacturing metal parts.
  • To explore the potential for creating multi-material metallic components using this technique.

Main Methods:

  • Fabrication of a 10-layer part using copper powder and a sapphire plate.
  • Utilizing a 14W 445 nm laser to sinter powder through the transparent substrate.
  • Repeating the layer-by-layer deposition and sintering process.

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Related Experiment Videos

Last Updated: Jul 11, 2025

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17.3K
Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
08:32

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Published on: May 14, 2016

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Main Results:

  • Successful demonstration of layer-by-layer metal part fabrication via inverted laser sintering.
  • Proof of concept for creating multi-layer metallic components.

Conclusions:

  • The inverted laser sintering process is a viable method for manufacturing metal parts.
  • This technique offers a powder-bed-free approach for fabricating multi-material metallic components, opening new avenues in additive manufacturing.