Enhanced field induced martensitic phase transition and magnetocaloric effect in Ni55Mn20Ga25 metallic foams

Carlo Paolo Sasso; Peiqi Zheng; Vittorio Basso; Peter Müllner; David C. Dunand

doi:10.1016/j.intermet.2011.02.015

Enhanced field induced martensitic phase transition and magnetocaloric effect in Ni₅₅Mn₂₀Ga₂₅ metallic foams

Carlo Paolo Sasso, Peiqi Zheng, Vittorio Basso, Peter Müllner, David C. Dunand

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The high surface/volume ratio and mechanical stability under cyclic strain makes polycrystalline Ni-Mn-Ga metallic foams attractive for magnetic refrigeration. By means of comparison with a polycrystalline bulk material, we have demonstrated that the porous structure of Ni_54.8Mn _20.2Ga_25.0 open-cells metallic foams (porosity varying between 44% and 58%) reduces the temperature span of the phase transition and increases the magnetocaloric effect (MCE). MCE was investigated using calorimetry in a magnetic field. Temperature scan and isothermal experiments have shown a 0.8 K T^-1 shift of the phase transition temperature and a maximum irreversible entropy change of 2.5 Jkg^-1 K^-1. The results indicate that metallic foams can represent a good approach for enhancing field induced phase transitions in magnetic refrigeration applications.

Original language	English (US)
Pages (from-to)	952-956
Number of pages	5
Journal	Intermetallics
Volume	19
Issue number	7
DOIs	https://doi.org/10.1016/j.intermet.2011.02.015
State	Published - Jul 2011

Keywords

A. Magnetic intermetallics
B. Magnetic properties
B. Martensitic transformations
F. Calorimetry

ASJC Scopus subject areas

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.intermet.2011.02.015

Cite this

@article{97f5c878aede426280472c096eb87646,

title = "Enhanced field induced martensitic phase transition and magnetocaloric effect in Ni55Mn20Ga25 metallic foams",

abstract = "The high surface/volume ratio and mechanical stability under cyclic strain makes polycrystalline Ni-Mn-Ga metallic foams attractive for magnetic refrigeration. By means of comparison with a polycrystalline bulk material, we have demonstrated that the porous structure of Ni54.8Mn 20.2Ga25.0 open-cells metallic foams (porosity varying between 44% and 58%) reduces the temperature span of the phase transition and increases the magnetocaloric effect (MCE). MCE was investigated using calorimetry in a magnetic field. Temperature scan and isothermal experiments have shown a 0.8 K T-1 shift of the phase transition temperature and a maximum irreversible entropy change of 2.5 Jkg-1 K-1. The results indicate that metallic foams can represent a good approach for enhancing field induced phase transitions in magnetic refrigeration applications.",

keywords = "A. Magnetic intermetallics, B. Magnetic properties, B. Martensitic transformations, F. Calorimetry",

author = "Sasso, {Carlo Paolo} and Peiqi Zheng and Vittorio Basso and Peter M{\"u}llner and Dunand, {David C.}",

note = "Funding Information: PZ, PM, and DCD acknowledge financial support of the National Science Foundation, Division of Materials Research grant No. NSF-DMR 0804984 (Boise State University) and grant No. DMR-0805064 (Northwestern University). Funding Information: CPS and VB acknowledge that the research leading to these results received funding from the European Community 7th Framework Programme under grant agreement 214864 (project SSEEC).",

year = "2011",

month = jul,

doi = "10.1016/j.intermet.2011.02.015",

language = "English (US)",

volume = "19",

pages = "952--956",

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TY - JOUR

T1 - Enhanced field induced martensitic phase transition and magnetocaloric effect in Ni55Mn20Ga25 metallic foams

AU - Sasso, Carlo Paolo

AU - Zheng, Peiqi

AU - Basso, Vittorio

AU - Müllner, Peter

AU - Dunand, David C.

N1 - Funding Information: PZ, PM, and DCD acknowledge financial support of the National Science Foundation, Division of Materials Research grant No. NSF-DMR 0804984 (Boise State University) and grant No. DMR-0805064 (Northwestern University). Funding Information: CPS and VB acknowledge that the research leading to these results received funding from the European Community 7th Framework Programme under grant agreement 214864 (project SSEEC).

PY - 2011/7

Y1 - 2011/7

N2 - The high surface/volume ratio and mechanical stability under cyclic strain makes polycrystalline Ni-Mn-Ga metallic foams attractive for magnetic refrigeration. By means of comparison with a polycrystalline bulk material, we have demonstrated that the porous structure of Ni54.8Mn 20.2Ga25.0 open-cells metallic foams (porosity varying between 44% and 58%) reduces the temperature span of the phase transition and increases the magnetocaloric effect (MCE). MCE was investigated using calorimetry in a magnetic field. Temperature scan and isothermal experiments have shown a 0.8 K T-1 shift of the phase transition temperature and a maximum irreversible entropy change of 2.5 Jkg-1 K-1. The results indicate that metallic foams can represent a good approach for enhancing field induced phase transitions in magnetic refrigeration applications.

AB - The high surface/volume ratio and mechanical stability under cyclic strain makes polycrystalline Ni-Mn-Ga metallic foams attractive for magnetic refrigeration. By means of comparison with a polycrystalline bulk material, we have demonstrated that the porous structure of Ni54.8Mn 20.2Ga25.0 open-cells metallic foams (porosity varying between 44% and 58%) reduces the temperature span of the phase transition and increases the magnetocaloric effect (MCE). MCE was investigated using calorimetry in a magnetic field. Temperature scan and isothermal experiments have shown a 0.8 K T-1 shift of the phase transition temperature and a maximum irreversible entropy change of 2.5 Jkg-1 K-1. The results indicate that metallic foams can represent a good approach for enhancing field induced phase transitions in magnetic refrigeration applications.

KW - A. Magnetic intermetallics

KW - B. Magnetic properties

KW - B. Martensitic transformations

KW - F. Calorimetry

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