The Influence of Preparation Parameters on the Morphology and Magnetic Properties of Fe-N Powders Obtained by the Gas Atomization Method

α″-Fe<sub>16</sub>N<sub>2</sub> materials are of increasing interest for their applications in products such as rare earth-free permanent magnets. The lack of a method of mass production for powders as raw materials delays the preparation of such magnets. Through employing th...

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Bibliographic Details
Main Authors: Marian Grigoras, Mihaela Lostun, George Stoian, Gabriel Ababei, Marieta Porcescu, Nicoleta Lupu
Format: Article
Language:English
Published: MDPI AG 2023-10-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/13/20/11529
Description
Summary:α″-Fe<sub>16</sub>N<sub>2</sub> materials are of increasing interest for their applications in products such as rare earth-free permanent magnets. The lack of a method of mass production for powders as raw materials delays the preparation of such magnets. Through employing the gas atomization method, we managed to prepare α″-Fe<sub>16</sub>N<sub>2</sub> powders whose morphology and magnetic properties were tailored by the preparation parameters. As a result of optimizing the preparation parameters (ejection temperature and pressure, ejection nozzle diameter, and atomization pressure), we managed to prepare powders with a size of about 30 μm and a content of 31% α″-Fe<sub>16</sub>N<sub>2</sub> phase. The value of the saturation magnetization (234.8 emu/g), the reasonable coercivity value (970 Oe) presented by the prepared powders, and the opportunity of scaling up approaches based on the preparation of powders via gas atomization support the feasibility of preparing α″-Fe<sub>16</sub>N<sub>2</sub> powders at an industrial level.
ISSN:2076-3417