{"id":8788,"date":"2018-07-13T09:00:12","date_gmt":"2018-07-13T09:00:12","guid":{"rendered":"https:\/\/www.3dnatives.com\/en\/?p=8788"},"modified":"2018-07-12T13:04:34","modified_gmt":"2018-07-12T13:04:34","slug":"gold-detect-defects-in-3d-print130720184","status":"publish","type":"post","link":"https:\/\/www.3dnatives.com\/en\/gold-detect-defects-in-3d-print130720184\/","title":{"rendered":"Researchers use gold to detect defects in 3D printing"},"content":{"rendered":"

Researchers at Vanderbilt University in the United States have developed a technique to detect anomalies that may occur in\u00a03D printed parts. The gold particles are used for their ability to start shining as soon as an error appears. Simply put the process use gold to detect defects. A reflection that should interest more than one!<\/p>\n

Although 3D printing facilitates the general manufacturing process and creation, the fact remains that the technology has some flaws that are not always visible to the naked eye.\u00a0One can have a layer of material that has been poorly deposited, thus increasing the fragility of the final piece.\u00a0However, the technique developed by these American researchers could well circumvent some of these difficulties and thus improve the entire 3D printing process.<\/p>\n

Gold to detect anomalies in 3D printing<\/h3>\n

The Vanderbilt University team explains that it used gold chloride that has a dark brown colour, which it then turn into nanoparticles.\u00a0These would be approximately 100,000 times thinner than human hair, yet their usefulness could be very much greater.\u00a0They are mixed with a dissolved plastic polymer;\u00a0this mixture is then dried, hardens and is grounded up. From there the researchers are able to create a 3D printing filament, a kind of material that is infused with the gold pieces.<\/p>

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From a\u00a0very specific\u00a0spectrophotometer, the researchers explain that they can detect defects in the 3D printed part in just a few seconds.\u00a0The optical properties of the nanoparticles embedded in the filament would indeed make it possible to identify any defects.\u00a0Cole Brubaker, an engineer graduate of the University explains:
\n”\u00a0We use the absorbance properties of embedded gold nanoparticles.\u00a0We scan the room and we can see where the absorbance decreases inside, signaling a defect in the material.\u00a0A defect can be found with a single non-destructive measurement.\u00a0It’s very fast, it only takes a few seconds.\u00a0<\/em>“<\/p>\n

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Nanoparticles are integrated into the 3D printing filament<\/p>\n<\/div>\n

3D printed parts could therefore self-evaluate and save time in the verification process.\u00a0However, there are still a few things to go through before this smart material enters the 3D printing filament market.\u00a0In the meantime, you can find more information on the\u00a0official website of Vanderbilt University<\/a>\u00a0and in the video below:<\/p>\n