The glass that’s stronger than steel

Yale engineer Jan Schroers will lead a three-year, $1.2 million project intended to dramatically accelerate the pace of discovering and characterizing bulk metallic glasses (BMGs), a versatile type of pliable glass that’s stronger than steel.

The grant, awarded as part of the National Science Foundation’s program for Designing Materials to Revolutionize and Engineer our Future, will enable Schroers’ team to screen more than 3,000 potential BMG alloys in a week, a vast improvement over traditional methods that take as much as a full day to identify a single alloy.

“With this project, we can bring materials discovery to a new level, reducing the time for identifying all possible BMG alloys from a projected 4,000 years to perhaps as little as four years,” said Schroers, a professor of mechanical engineering and materials science at the Yale School of Engineering & Applied Science.

The project will produce and characterize millions of potential BMGs, a significant increase over the 120,000 BMGs produced and characterized to date by traditional methods — just 100 of which are good glass formers. The key to this advancement, said Schroers, is the combination of three integrated computational and experimental techniques, each pioneered by a different team member.

First, Stefano Curtarolo of Duke University will use combinatorial simulations to rapidly analyze the crystalline structures for thousands of potential alloys. Schroers will then examine the fabrication abilities of the best alloys identified by Curturaolo by simultaneously testing thousands of millimeter-size, controllably-mixed alloys for their ability to generate bubble gum-like bubbles — a technique that indicates alloy pliability. Finally, Joost Vlassak of Harvard University will rapidly characterize the best performing alloys using nanocalorimetry, a method that measures various thermal properties such as the melting and glass transition temperatures.

“There are strong arguments that metallic glasses are an ideal problem for this kind of combinatorial materials science because they are extremely complex, with up to six element alloys,” said Schroers, who added that the ideal plurality of properties for a BMG — reasonable costs, appropriate strength and toughness, corrosion resistance — has been extremely difficult to find using the slow trial-and-error of traditional methods.

“Currently, our most successful alloy is platinum-based, and it has everything except the price,” said Schroers. “We hope to find instead a copper- or aluminum-based alloy, which would effectively bring these very cool materials out of the lab and into everyday life.”

Published in collaboration with YaleNews

Author: Rase McCray develops and directs activities that expand the visibility of Yale’s School of Engineering & Applied Science.

Image: Blow formed, bulk metallic glass samples. Yale

Don't miss any update on this topic

Create a free account and access your personalized content collection with our latest publications and analyses.

Sign up for free

License and Republishing

World Economic Forum articles may be republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License, and in accordance with our Terms of Use.

The views expressed in this article are those of the author alone and not the World Economic Forum.

Share:
World Economic Forum logo

Forum Stories newsletter

Bringing you weekly curated insights and analysis on the global issues that matter.