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Using Ultrabright X-Rays at Argonne to Test Materials for Ultrafast Aircraft

ⓘ This article is third-party content and does not represent the views of this site. We make no guarantees regarding its accuracy or completeness.

This might seem like an obvious statement, but designing an aircraft that flies at five to seven times the speed of sound is difficult. Paradoxically, materials for hypersonic aircraft must be light and thin while also withstanding extraordinary pressures and temperatures. Engineering such materials is one thing but testing them under the actual conditions they would encounter on a hypersonic flight is quite another.

A group of researchers from Embry-Riddle Aeronautical University is working to crack this conundrum. In partnership with the U.S. Department of Energy’s (DOE) Argonne National Laboratory, the research team is in the midst of designing a device that will reproduce the extreme heat fluctuations and stresses of hypersonic flight. The device will work in tandem with the ultrabright X-rays of the Advanced Photon Source (APS), a DOE Office of Science user facility at Argonne, to track the changes that occur in these materials as they happen.

“Recreating the environment of hypersonic flight can be complicated,” said Seetha Raghavan, professor of aerospace engineering and a co-principal investigator on the project. “There are so many factors and no perfect way to test them all. High enthalpy wind tunnels that can simulate the wind speed use a lot of energy resources and are limited in access.” (Enthalpy refers to the heat content of a system at constant pressure.)

The research team’s goal is an alternative that replicates hypersonic flight conditions using fewer energy resources and uses APS X-rays to capture detailed data. The APS is in the final stages of an upgrade that increased the brightness of its X-ray beams by up to 500 times. It is now the brightest synchrotron X-ray facility in the world, and according to Raghavan, the enhanced capabilities of the upgraded APS are crucial to this project.

Victoria Cooley, an APS beamline scientist who worked with the Embry-Riddle team at beamline 1-ID, touted both the upgraded X-ray beam and the improved experiment station.

"It's an exciting time for our beamline," she said. "Brighter X-rays allow us to probe deep into materials with a higher-resolution beam and map very thin samples like these. At the same time, we have installed faster, more sensitive detectors to capture chemical or crystallographic changes occurring incredibly quickly. These two pieces come together to make world-changing projects such as this one possible."

Uncovering materials that can withstand the conditions of hypersonic flight and are not prohibitively expensive to produce is key to unlocking their many applications. Durable hypersonic materials could be used for military and civilian aircraft, as well as cargo delivery vehicles.

Contacts

Christopher J. Kramer

Head of Media Relations

Argonne National Laboratory

Office: 630.252.5580

Email: media@anl.gov

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