Making more efficient motors with 3D printed metallic glass
Researchers from North Carolina State University use 3D printed iron-based amorphous metal alloys to make more efficient motors and other equipment. Researchers produce ferroalloys that are 15 times thicker than their critical castings. An amorphous metal, also known as metallic glass, is a solid metallic material with a disordered atomic scale structure. They are amorphous in the solid state and have good electrical conductivity, allowing them to be used on high voltage transformers. Some researchers have studied biomaterials that use amorphous metals as human implants.
The problem with making amorphous metals is the need for rapid cooling to prevent the formation of crystal structures.
This usually limits the ability of scientists to make amorphous metals in very thin layers. However, using 3D printing technology , researchers at North Carolina State University may have found a larger method of producing metallic glass that goes beyond the critical casting thickness of the material. “The idea of ​​using additive manufacturing or 3D printing to produce metallic glass that is larger than the critical casting thickness has been around for more than a decade,†Dr. Zaynab Mahabooba explained. “But this is the first published work that shows that we can do it. We can Produces amorphous iron alloys on a scale 15 times larger than its critical casting thickness."
The metallic glass 3D printing process works one layer at a time by melting a 20 micron metal powder layer. Due to the thin layer, the metal cools quickly and retains its amorphous amorphous nature. But unlike other printing techniques, which produce a distinct layered structure, the process produces a uniform metallic glass object.
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"This is proof that we can do this," said Edward P. Fitz, Distinguished Professor of Industrial Systems and Engineering at North Carolina State University. "There is no reason why this technology can't be used to produce any amorphous alloy," Harrysson added. "Some metallic glass has shown great potential for use in electric motors, reducing waste heat and converting more electricity from electromagnetic fields to electricity. ."
Although researchers will have to continue trial and error studies to find the ideal alloy composition for a particular application, they believe their work may create enormous opportunities for creating wear-resistant materials, including high-strength materials and lightweight materials. 3D printing structure. “Because we are talking about additive manufacturing, we can produce these metallic glasses with a variety of complex geometries, which also contribute to their practicality in a variety of applications,†says Harrysson.
Source: ZOL Zhongguancun Online
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