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A Novel Fabrication of Spherical Fe50Ni50 Alloy Powders via in-Situ De-Wetting of Liquid Solid Interface

1
Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, China
2
College of Engineering and Applied Science, Nanjing University, Nanjing 210093, China
3
Haian Institute of High-Tech Research, Nanjing University, Nanjing 226600, China
*
Authors to whom correspondence should be addressed.
Crystals 2019, 9(7), 325; https://doi.org/10.3390/cryst9070325
Received: 28 May 2019 / Revised: 16 June 2019 / Accepted: 23 June 2019 / Published: 26 June 2019
(This article belongs to the Section Crystalline Materials)
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Abstract

Spherical Fe50Ni50 alloy powders were fabricated via a novel route based on in-situ interface de-wetting between liquid Fe-Ni alloy and alumina. The obtained Fe50Ni50 alloy particles exhibit very good spherical shape according to SEM images. Furthermore, the cross-sectional SEM images show that there are no pores and bulk inclusions in the internal region of the spherical particles. The XRD results show a trace amount of the impurity alumina phase appearing in taenite phase. The size distribution agreed well with the SEM observation confirms that the alumina powders successfully segregated pre-alloy powders. As an incidental benefit, the surface alumina particles were treated as the electrical insulation coatings. The magnetic character shows that spherical Fe50Ni50 powders exhibit a good soft magnetic property even though with a slightly decreasing of saturation magnetization due to non-magnetic coatings. Our strategies provide a method to in-situ fabricate insulation coated Fe-Ni spherical alloy powders as magnetic powder core. View Full-Text
Keywords: spherical Fe-Ni powders; de-wetting; alumina; liquid-solid interface; magnetic properties spherical Fe-Ni powders; de-wetting; alumina; liquid-solid interface; magnetic properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Song, X.; Lei, C.; Zhong, W. A Novel Fabrication of Spherical Fe50Ni50 Alloy Powders via in-Situ De-Wetting of Liquid Solid Interface. Crystals 2019, 9, 325.

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