About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Magnetic Materials for Energy and Power Conversion Applications
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Presentation Title |
Synthesis of α″-Fe16N2 Foils for Bulk Rare-earth-free α″-Fe16N2 Permanent Magnet and its Potential Applications |
Author(s) |
Jian-Ping Wang |
On-Site Speaker (Planned) |
Jian-Ping Wang |
Abstract Scope |
α″-Fe16N2 has been proposed and investigated as one of the most promising candidates for rare-earth-free magnets because of its environment-friendly materials. We have addressed several concerns related with its basic performances, including the confirmation of its giant saturation magnetization, large magnetic anisotropy and reasonable decomposition temperature. In this talk, I report a foil-based approach to synthesize bulk α”-Fe16N2 magnet. First, an oxidation and reduction process is applied on iron foils to tune its microstructure, then a nitriding process is carried out. A high volume ratio of α”-Fe16N2 phase is achieved. The obtained saturation magnetization of foils is 10% higher than that of pure iron foils. A coercivity up to 1400 Oe is obtained, which could be further enhanced by reducing the exchange coupling between α”-Fe16N2 grains. An ultra-low temperature coefficient of coercivity of α”-Fe16N2 is confirmed for foils. I will discuss several niche applications for α”-Fe16N2 magnet. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |