What is it about?
Caloric materials are candidates for environementally friendly solid state refrigeration. Among other materials, superelastic metallic alloys are excellent for this application. Until now most efforts have focused on elastocaloric behaviour under applied tensile cycles. In this work, we have studied the physics behind the caloric effect in a Cu-Al-Ni single crystal under a flexure cycle. The main source of caloric effect is the martensitic structural transition that creates phase fronts that travel along the sample exchanging latent heat.
Photo by Lukáš Lehotský on Unsplash
Why is it important?
Flexure might be a much easier way to act on caloric materials for practical applications. It is important to determine where on the samples and when the heat exchange takes place in order to improve the efficiency of future devices.
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This page is a summary of: Flexocaloric effect in superelastic materials, APL Materials, December 2022, American Institute of Physics, DOI: 10.1063/5.0129331.
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