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电弧熔炼、机械合金化和放电等离子烧结制备的FeNiMn合金的结构、压缩和软磁性能研究

Study of Structural, Compression, and Soft Magnetic Properties of FeNiMn Alloy Prepared by Arc Melting, Mechanical Alloying, and Spark Plasma Sintering.

作者信息

Zaara Kaouther, Optasanu Virgil, Le Gallet Sophie, Escoda Lluisa, Saurina Joan, Bernard Frédéric, Khitouni Mohamed, Suñol Joan-Josep, Chemingui Mahmoud

机构信息

Department of Physics, University of Girona, Campus Montilivi, 17071 Girona, Spain.

Laboratoire Interdisciplinaire Carnot de Bourgogne-ICB UMR 6303 CNRS, Université de Bourgogne, BP 47870, CEDEX, 21078 Dijon, France.

出版信息

Materials (Basel). 2023 Nov 20;16(22):7244. doi: 10.3390/ma16227244.

DOI:10.3390/ma16227244
PMID:38005172
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10672919/
Abstract

Soft magnetic FeNiMn (at. %) alloy was successfully synthesized by mechanical alloying and spark plasma sintering (SPS) and, in parallel, the same composition was prepared by arc melting (AM) for comparison. Several SPS conditions were tested. X-ray diffraction and scanning electron microscopy were used to investigate the structure, phase composition, and morphology of the samples. It was found that mechanical alloying produced BCC and FCC supersaturated solid solution after 130 h of milling, with a fine microstructure (i.e., crystallite size of 10 nm). Spark plasma sintering performed at 750 °C and 1000 °C under two pressures of 50 MPa and 75 MPa revealed stable FCC phases. A single FCC phase was observed after the arc melting synthesis. The magnetic properties of milled powders and solids obtained by AM and SPS were investigated. The specimen consolidated by SPS at 1000 °C under the pressure of 50 MPa exhibits soft magnetic behavior (coercivity 0.07 Oe), whereas the mechanically alloyed sample revealed hard magnetic behavior. The specimen consolidated at 750 °C under a pressure of 75 MPa showed a higher compressive strength of 1700 MPa and a Vickers hardness of 425 ± 18 HV. As a result, sintering at 750 °C/75 MPa can be utilized to enhance the mechanical properties, while those sintered at 1000 °C/50 MPa increase magnetic softness.

摘要

通过机械合金化和放电等离子烧结（SPS）成功合成了软磁FeNiMn（原子百分比）合金，同时，采用电弧熔炼（AM）制备了相同成分的合金用于对比。测试了几种SPS条件。利用X射线衍射和扫描电子显微镜研究了样品的结构、相组成和形貌。结果发现，机械合金化在球磨130小时后产生了体心立方（BCC）和面心立方（FCC）过饱和固溶体，具有精细的微观结构（即晶粒尺寸为10纳米）。在50 MPa和75 MPa两种压力下于750℃和1000℃进行的放电等离子烧结显示出稳定的FCC相。电弧熔炼合成后观察到单一的FCC相。研究了通过AM和SPS获得的球磨粉末和固体的磁性能。在50 MPa压力下于1000℃通过SPS固结的试样表现出软磁行为（矫顽力0.07奥斯特），而机械合金化样品显示出硬磁行为。在75 MPa压力下于750℃固结的试样显示出1700 MPa的较高抗压强度和425±18 HV的维氏硬度。因此，在750℃/75 MPa下烧结可用于提高机械性能，而在1000℃/50 MPa下烧结可提高磁软度。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a3e/10672919/82ac5fb15286/materials-16-07244-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a3e/10672919/ca33380dc3b0/materials-16-07244-g013.jpg

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本文引用的文献

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