Preparation of α'- Fe(N)/α'-Fe8N by γ'-Fe4N precursor

被引：1

作者：

Ma, Bin ^{[1
]}

Guo, Guannan ^{[1
]}

Liu, Jinming ^{[1
]}

Zhang, Fan ^{[1
]}

Wang, Jian-Ping ^{[1
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, 200 Union St SE, Minneapolis, MN 55455 USA

来源：

AIP ADVANCES | 2022年 / 12卷 / 07期

关键词：

The work was partially sponsored by Niron Magnetics; Inc. We are grateful to Dr. Yiming Wu; Dr. John Larson; Dr. Frank Johnson; and technicians for their assistance in arranging nitrogenizing some samples using Niron facilities based on our pretreated Fe–Cu–B ribbons as input precursors and our proposed specific processing recipes.Part of this work was carried out by the help of Dr. Javier Garcia Barriocanal; in the Characterization Facility; the University of Minnesota; which receives partial support from NSF through the MRSEC program. We also thank the partial support in VSM measurements from the Institute of Rock Magnetism;

D O I：

10.1063/5.0098628

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An approach by using the gamma'-Fe4N precursor was proposed to prepare a bulk magnet with high alpha''-Fe16N2 content, and the feasibility for high N content alpha'-Fe(N)/alpha'-Fe8N was demonstrated in ribbon samples. gamma'-Fe4N decomposed when it was heated to a high temperature, and then, a supersaturated gamma-Fe(N) phase formed because of N atoms diffusing out from the gamma'-Fe4N lattice. The short-lived supersaturated gamma-Fe(N) had the face-centered cubic lattice, and its nitrogen content is beyond 3.0 wt. %. The supersaturated gamma-Fe(N) acts as a precursor of the martensite transformation for a body-centered tetragonal phase. After the cryo-treatment, which was essential to complete the martensite transformation, a mixture of alpha'-Fe(N) and alpha'-Fe8N was obtained. The N content of more than 2.5 wt.% in the samples was achieved. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：9

共 22 条

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