Microstructural characterization of Ni-Mn-Ga ferromagnetic shape memory alloy powders

Virgil C. Solomon; David Smith; YunJun Tang; Ami E. Berkowitz

doi:10.1063/1.1687204

Microstructural characterization of Ni-Mn-Ga ferromagnetic shape memory alloy powders

Virgil C. Solomon, David Smith, YunJun Tang, Ami E. Berkowitz

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22 Scopus citations

Abstract

The phase transformation and electron microscopic characterization of Ni-Mn-Ga ferromagnetic shape memory alloys (FSMA) powders produced by spark erosion were investigated. Powder quenched in liquid argon were solid spheres and in nitrogen were hollow spherical particles. It was observed that the electron microscopy observation of powders as sparked in nitrogen were highly disordered nanocrystalline grains and in liquid display extensive crystallinity. The results show that Ni-Mn-Ga powders were suitable for the development of magnetic-field-driven FSMA powder/polymer microcomposites.

Original language	English (US)
Pages (from-to)	6954-6956
Number of pages	3
Journal	Journal of Applied Physics
Volume	95
Issue number	11 II
DOIs	https://doi.org/10.1063/1.1687204
State	Published - Jun 1 2004

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "The phase transformation and electron microscopic characterization of Ni-Mn-Ga ferromagnetic shape memory alloys (FSMA) powders produced by spark erosion were investigated. Powder quenched in liquid argon were solid spheres and in nitrogen were hollow spherical particles. It was observed that the electron microscopy observation of powders as sparked in nitrogen were highly disordered nanocrystalline grains and in liquid display extensive crystallinity. The results show that Ni-Mn-Ga powders were suitable for the development of magnetic-field-driven FSMA powder/polymer microcomposites.",

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AU - Solomon, Virgil C.

AU - Smith, David

AU - Tang, YunJun

AU - Berkowitz, Ami E.

PY - 2004/6/1

Y1 - 2004/6/1

N2 - The phase transformation and electron microscopic characterization of Ni-Mn-Ga ferromagnetic shape memory alloys (FSMA) powders produced by spark erosion were investigated. Powder quenched in liquid argon were solid spheres and in nitrogen were hollow spherical particles. It was observed that the electron microscopy observation of powders as sparked in nitrogen were highly disordered nanocrystalline grains and in liquid display extensive crystallinity. The results show that Ni-Mn-Ga powders were suitable for the development of magnetic-field-driven FSMA powder/polymer microcomposites.

AB - The phase transformation and electron microscopic characterization of Ni-Mn-Ga ferromagnetic shape memory alloys (FSMA) powders produced by spark erosion were investigated. Powder quenched in liquid argon were solid spheres and in nitrogen were hollow spherical particles. It was observed that the electron microscopy observation of powders as sparked in nitrogen were highly disordered nanocrystalline grains and in liquid display extensive crystallinity. The results show that Ni-Mn-Ga powders were suitable for the development of magnetic-field-driven FSMA powder/polymer microcomposites.

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Microstructural characterization of Ni-Mn-Ga ferromagnetic shape memory alloy powders

Abstract

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