Argonne/Carnegie Mellon team identifies causes of defects in 3D printing
The advent of 3D printing promises to revolutionize the manufacturing industry. Yet, the tiny gas pockets that sometimes form during the printing process can lead to cracks and other product failures. Researchers from Carnegie Mellon University and the U.S. Department of Energy’s (DOE) Argonne National Laboratory have identified how and when these gas pockets form — a pivotal discovery that could dramatically improve the technology.
Until now, manufacturers had used a trial-and-error approach to seek to reduce such defects. Researchers used the high-energy X-rays at Argonne’s Advanced Photon Source, a DOE Office of Science User Facility, to take super-fast video and images of the printing process. The images revealed that defects form when pockets of gas (known as vapor depressions) become unstable during the laser scanning that forms the product.
The team also determined how to predict when a small depression will grow into a big, unstable one that can potentially create a defect.
Argonne and Pitt uncover the ‘secrets’ of solar cells
Solar power is a renewable, sustainable and virtually inexhaustible source of electricity. Solar cells, therefore, are essential to the mission of clean energy advanced by the DOE. But temperature can have a dramatic effect on solar cells, profoundly influencing their efficiency and lifespan.
Researchers at the University of Pittsburgh and Hamad Bin Khalifa University leveraged the power of supercomputers at Argonne to study how a material’s electronic structure leads to fluctuations in the operating temperature of solar cells.
Using the supercomputers at the Argonne Leadership Computing Facility (ALCF), the team studied grain boundaries, ubiquitous defects that can greatly affect a material’s mechanical and electronic properties. Interpreting the atomic structures within a grain boundary is difficult without theoretical models. The ALCF’s high-performance supercomputers enabled the team to create simulations and ultimately gain a comprehensive understanding of how temperature impacts the electronic structure of a solar cell.