2017年10月
Synthesis of single-phase L1(0)-FeNi magnet powder by nitrogen insertion and topotactic extraction
SCIENTIFIC REPORTS
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- 巻
- 7
- 号
- 開始ページ
- 13216
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41598-017-13562-2
- 出版者・発行元
- NATURE PUBLISHING GROUP
Tetrataenite (L1(0)-FeNi) is a promising candidate for use as a permanent magnet free of rare-earth elements because of its favorable properties. In this study, single-phase L1(0)-FeNi powder with a high degree of order was synthesized through a new method, nitrogen insertion and topotactic extraction (NITE). In the method, FeNiN, which has the same ordered arrangement as L1(0)-FeNi, is formed by nitriding A1-FeNi powder with ammonia gas. Subsequently, FeNiN is denitrided by topotactic reaction to derive single-phase L1(0)-FeNi with an order parameter of 0.71. The transformation of disordered-phase FeNi into the L1(0) phase increased the coercive force from 14.5 kA/m to 142 kA/m. The proposed method not only significantly accelerates the development of magnets using L1(0)-FeNi but also offers a new synthesis route to obtain ordered alloys in non-equilibrium states.
- リンク情報
- ID情報
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- DOI : 10.1038/s41598-017-13562-2
- ISSN : 2045-2322
- Web of Science ID : WOS:000413048000027