Magnetic response of porous NiCoMnSn metamagnetic shape memory alloys fabricated using solid-state replication

J. A. Monroe, J. Cruz-Perez, C. Yegin, I. Karaman, A. B. Geltmacher, R. K. Everett, R. Kainuma

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

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 languageEnglish
Pages (from-to)116-119
Number of pages4
JournalScripta Materialia
Volume67
Issue number1
DOIs
Publication statusPublished - 2012 Jul

Keywords

  • Magnetocaloric effect
  • Martensitic transformation
  • Metamagnetic shape memory alloys
  • Porous materials
  • Solid state replication

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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