Hollow metallic microspheres produced by spark erosion

A. E. Berkowitz; H. Harper; David Smith; Hao Hu; Qian Jiang; Virgil C. Solomon; H. B. Radousky

doi:10.1063/1.1779962

Hollow metallic microspheres produced by spark erosion

A. E. Berkowitz, H. Harper, David Smith, Hao Hu, Qian Jiang, Virgil C. Solomon, H. B. Radousky

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Abstract

The synthesis of hollow metallic microspheres of Ni, CoFe, the ferromagnetic shape memory alloy Ni ₄₉Mn ₃₀Ga ₂₁, and the giant magnetostrictive alloy Fe ₈₃Ga ₁₇, by spark erosion using liquid nitrogen as the dielectric liquid was analyzed. The cross-sectional structure of the microspheres was investigated using scanning electron microscopy (SEM). It was observed that the wall thickness of the hollow particles was depended on the elemental composition of the particles. It was also observed that the particles prepared in liquid argon exhibited negligible porosity, while the particles prepared in liquid nitrogen were hollow.

Original language	English (US)
Pages (from-to)	940-942
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	6
DOIs	https://doi.org/10.1063/1.1779962
State	Published - Aug 9 2004

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1779962

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title = "Hollow metallic microspheres produced by spark erosion",

abstract = "The synthesis of hollow metallic microspheres of Ni, CoFe, the ferromagnetic shape memory alloy Ni 49Mn 30Ga 21, and the giant magnetostrictive alloy Fe 83Ga 17, by spark erosion using liquid nitrogen as the dielectric liquid was analyzed. The cross-sectional structure of the microspheres was investigated using scanning electron microscopy (SEM). It was observed that the wall thickness of the hollow particles was depended on the elemental composition of the particles. It was also observed that the particles prepared in liquid argon exhibited negligible porosity, while the particles prepared in liquid nitrogen were hollow.",

author = "Berkowitz, {A. E.} and H. Harper and David Smith and Hao Hu and Qian Jiang and Solomon, {Virgil C.} and Radousky, {H. B.}",

note = "Funding Information: Work at LLNL was performed under the auspices of the U. S. Department of Energy, under Contract No. W-705-ENG-48. Work at UCSD was funded through the LLNL Materials Research Institute, and from a MURI program administered by ONR.",

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doi = "10.1063/1.1779962",

language = "English (US)",

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T1 - Hollow metallic microspheres produced by spark erosion

AU - Berkowitz, A. E.

AU - Harper, H.

AU - Smith, David

AU - Hu, Hao

AU - Jiang, Qian

AU - Solomon, Virgil C.

AU - Radousky, H. B.

N1 - Funding Information: Work at LLNL was performed under the auspices of the U. S. Department of Energy, under Contract No. W-705-ENG-48. Work at UCSD was funded through the LLNL Materials Research Institute, and from a MURI program administered by ONR.

PY - 2004/8/9

Y1 - 2004/8/9

N2 - The synthesis of hollow metallic microspheres of Ni, CoFe, the ferromagnetic shape memory alloy Ni 49Mn 30Ga 21, and the giant magnetostrictive alloy Fe 83Ga 17, by spark erosion using liquid nitrogen as the dielectric liquid was analyzed. The cross-sectional structure of the microspheres was investigated using scanning electron microscopy (SEM). It was observed that the wall thickness of the hollow particles was depended on the elemental composition of the particles. It was also observed that the particles prepared in liquid argon exhibited negligible porosity, while the particles prepared in liquid nitrogen were hollow.

AB - The synthesis of hollow metallic microspheres of Ni, CoFe, the ferromagnetic shape memory alloy Ni 49Mn 30Ga 21, and the giant magnetostrictive alloy Fe 83Ga 17, by spark erosion using liquid nitrogen as the dielectric liquid was analyzed. The cross-sectional structure of the microspheres was investigated using scanning electron microscopy (SEM). It was observed that the wall thickness of the hollow particles was depended on the elemental composition of the particles. It was also observed that the particles prepared in liquid argon exhibited negligible porosity, while the particles prepared in liquid nitrogen were hollow.

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Hollow metallic microspheres produced by spark erosion

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