The new shape of aluminum extrusions

Earlier this year, deep-tech entrepreneur Eric Donsky formed Atomic13, a joint venture with one of the largest scrap metal companies in North America, to industrialize the Shear Assisted Processing and Extrusion, or ShAPE, process under development at the U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) based in Richland, Washington. The process transforms billets made from postconsumer aluminum into low-carbon extruded parts.

ShAPE leverages the combination of shear and axial forces to refine the grain structure of aluminum, unlocking the possibility of using 100 percent postconsumer scrap as the sole feedstock for producing high-performance aluminum extrusions and significantly lowering the carbon emissions associated with using primary aluminum.

Atomic13 initially is focused on delivering a catalog of extruded components for applications in building and construction (B&C), an industry that comprises roughly 57 percent of the $100 billion global aluminum extrusion market and is under increasing regulatory pressure to decarbonize.

“The business model is to build ShAPE extrusion at scale, build our own cast houses and be vertically integrated with our scrap partner that can certify all the scrap delivered to our plant gate as 100 percent postconsumer.” – Eric Donsky of Atomic13

Donsky has extensive experience commercializing deep-tech innovations. He was the founding CEO of Bioamber, one of the first industrial synthetic biology companies combining genome editing and precision fermentation to manufacture bulk chemicals and polymers from carbohydrates instead of petrochemicals.

Four national laboratories, including the PNNL, developed several proprietary process technologies that were exclusively licensed to Bioamber for commercialization.

The company eventually went public on the New York Stock Exchange at a $1.4 billion valuation.

Donsky later founded TearLab Corp., an early laboratory-on-a-chip diagnostic company, which grew into a $500 million NASDAQ listed firm.

Remodeling the aluminum microstructure

While the aluminum extrusion industry is working to decarbonize by increasing the recycled aluminum content in its billet compositions, extruders could need to add about 25 percent to 50 percent primary aluminum to their melts to dilute the impurities in the microstructure to attain the properties for a given alloy chemistry, Donsky says. As a result, aluminum extrusions can have a high carbon footprint.

Primary aluminum production results in significant carbon emissions, averaging 16 kilograms of CO2 for each kilogram produced, so adding primary aluminum to the casting process increases the embodied carbon of extruded products. By contrast, roughly 2 kilograms of CO2 are emitted per kilogram of steel produced, he says.

Donsky says the biggest challenge to broadening the use of aluminum scrap in billet compositions and extrusions is impurities, which typically are agglomerations of second-phase metallics, such as silicon, iron, manganese, magnesium and copper, contained in the scrap that adversely affect the structural and functional properties of the extrusions.

ShAPE addresses the impurities that can be found in aluminum scrap using rotational shear force.

“This is an atomic-scale remodeling of the aluminum microstructure in a fraction of a second right as we do extrusion,” Donsky says.

ShAPE uses rotation to create friction on the billet’s microstructure to obliterate the second phases, which he notes mitigates the risks of higher corrosion potential, poor cosmetic properties and microfracturing of the material.

Thousands of extrusions have been made using ShAPE, and their properties meet or exceed ASTM International standards for the corresponding alloy chemistry, according to PNNL.

“It’s an exciting opportunity to unlock the possibility of using twitch scrap as a raw material for manufacturing high-performance extrusions,” Donsky says.

The path to commercialization

Atomic13 has an ongoing partnership with PNNL and plans to continue research and development activities.

“The focus over the next 24 months is to develop a novel scrap-based alloy chemistry for the B&C industry that can deliver extrusions with similar or better properties than 6063 alloy,” Donsky says. “We plan on delivering extruded parts to customers for evaluation over the next year.

“The B&C industry is ready for the decarbonization of key building materials, and Atomic13 is well-positioned to become integral to the planning and construction of buildings with a low-carbon profile.”

Donsky says Atomic13 is partnering with leading architecture and engineering firms that influence the buying decisions of Atomic13’s targeted customers.

“This is an atomic-scale remodeling of the aluminum microstructure in a fraction of a second right as we do extrusion.” – Eric Donsky of Atomic13

“The business model is to build ShAPE extrusion at scale, build our own casthouses and be vertically integrated with our scrap partner that can certify all the scrap delivered to our plant gate as 100 percent postconsumer,” he says. “And to sell extrusions to the building and construction industry and eventually to other market segments where decarbonization drives the buying decision.

“We realized early on that we needed to partner with a major scrap metal company in order to integrate our supply chains and deliver products of high quality,” Donsky continues. “We were fortunate to secure a partnership with a company that shares our vision and has the capacity to deliver scrap supplies for factories nationwide.”

Atomic13 plans to build its first factory with sizable capacity for casting and extrusion, eventually incorporating finishing. That facility can serve as the model for additional plants going forward. The company is eying several possible locations for its first manufacturing facility.

Atomic13’s goal is to improve the competitiveness of the U.S. aluminum extrusion industry, with Donsky noting the dumping of products produced outside the country into the U.S. market.

“If we can build extrusions with a 90 percent lower carbon footprint from 100 percent-postconsumer scrap and offer our products on price parity, that is going to give the U.S. market more resilience against foreign intrusion if you will, like low-cost, dumped subsidized product,” he says.

The author is editorial director of Recycling Today Media Group and can be contacted at dtoto@gie.net.