| Abstract Scope |
Addressing current societal challenges demands the advancement of innovative, environmentally sustainable technologies and the capability to manufacture complex 3D structures in an economically viable method. Caloric materials, particularly magneto- and elasto-caloric compounds, hold promise for additive manufacturing and energy-efficient devices. Metamagnetic shape memory alloys, such as NiMnSn-based powders, are ideal for magnetic refrigeration due to their significant magnetic entropy change, though their stability decreases above 300 ºC. This work introduces tailored inks for cold extrusion printing using over 95 wt.% magnetocaloric powders in a hydroxypropyl cellulose and deionized water matrix. The inks were optimized for viscosity, enabling up to 250-layer 3D printing with 0.5 mm wall thickness. Post-processing includes calcination to remove polymers, sintering for densification, and nickel electrodeposition for corrosion protection. Notably, the magnetocaloric performance of printed samples is comparable to bulk materials, demonstrating their potential for next-generation applications. |