Characterization of Direct Laser Deposited Magnetocaloric Ni-Co-Mn-Sn




1st Paragraph: Ni-Mn-based Heusler alloys have been investigated for a number of different multifunctional applications, including shape memory and caloric effects under the influence of a magnetic field [1]. Ni-Mn-Sn alloys with small amount of Co have been found to exhibit a giant magnetocaloric effect (MCE) due to a large entropy change at the magnetic field-induced martensite > austenite phase transition [2]. This entropy change corresponds to a large change in magnetization, leading these alloys to be designated as the metamagnetic shape memory alloys (MMSMAs). One of the attractive applications for MMSMAs is in refrigeration, replacing vapor compression technology to increase efficiency and decrease environmental impact [3]. Ni-Co-Mn-Sn is an inverse MCE material – it cools with an applied magnetic field – and an example of a refrigeration cycle using such a material is shown in Figure 1.

Authors: Erica Stevens, Katerina Kimes, Volodymyr Chernenko, Anna Wojcik, Wojciech Maziarz, Jakub Toman, and Markus Chmielus

Keywords: Metamagnetic, Laser Metal Deposition, Additive Manufacturing

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3 pages


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