Abstract
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.
Original language | English |
---|---|
Pages (from-to) | 116-119 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 67 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2012 Jul |
Keywords
- Magnetocaloric effect
- Martensitic transformation
- Metamagnetic shape memory alloys
- Porous materials
- Solid state replication