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Kiel University Researchers New Method For Joining Metals Without Welding

June 25, 2018

An investigation team in the “Functional Nanomaterials” working group at Kiel University is promoting a flexible alternative to conventional welding and gluing processes. With a special etching process, it allows aluminium and aluminium alloys to mend together (potentially with polymers as well) developing a sturdy and powerful joint. The method presents a new means of joining metals without welding them.

The researchers call this new method nanoscale sculpturing. In order to use this joining process industrially, the Kiel University team and Phi-Stone have now developed a mobile and easy-to-use prototype called “Metalangelo”. Both organizations presented a prototype of the mobile joining unit at Hannover Messe in April. They have announced intentions to commence mass production soon. They will look into a few changes after analyzing the feedback from customers.

Advantages of Kiel’s Method

When conjoining metals, welding is probably the most typical technique. This, however, results in alterations in their structure in addition to their appearance. Scientific study has now developed an alternate that has the capacity to join aluminium alloys with one another and with polymers.

“If something breaks at all, then perhaps the actual adhesive or the material itself, but not the connection point.” said Ingo Paulowicz, board member of Phi-Stone.

The method breaks and roughens the surface of the material and then creates hook like micro-structures. These micro-structures cling together and become a conjoining metal part. When a couple of these treated surfaces are interlocked utilizing an adhesive, a powerful joint is produced that’s tough to break. These micro-structures are on the micro-meter level, which lives up to the nanoscale name.

The nanoscale sculpturing process opens up completely new possibilities in the field of joining technology. However, it also presents new combinations of materials, such as aluminium with copper or with silicone. The creators of the device think these metals would do very well in the medical field. It’s still in the prototype stage, so it’s too early to grasp its full potential. Regardless, this is a novel solution that does away with all the problems associated with welding. It’s not hard to see it becoming a staple in the industry.

All featured images courtesy of Kiel University and Phi-stone.

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