Magnetic response of porous NiCoMnSn metamagnetic shape memory alloys fabricated using solid-state replication
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NiCoMnSn porous metamagnetic shape memory alloys were successfully fabricated using solid-state replication of ammonium bicarbonate powders via sintering at 1273 K. Around 50% porosity of 300-500 μm interconnected pores was achieved. Oxygen contamination from the space holder and binder, which negatively influences the magneto-thermal coupling, was prevented using a titanium oxygen getter during sintering. The resulting porous samples demonstrate a metamagnetic response similar to the homogenized powder, offering possible utilization in magnetic refrigeration and actuation. © 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
author list (cited authors)
Monroe, J. A., Cruz-Perez, J., Yegin, C., Karaman, I., Geltmacher, A. B., Everett, R. K., & Kainuma, R.