Milyutin V A, Bures R, Faberova M, Kromka F, Kunca B
Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Sofia Kovalevskaya Str. 18, 620108, Ekaterinburg, Russia.
Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01, Kosice, Slovak Republic.
Heliyon. 2024 Sep 21;10(19):e38244. doi: 10.1016/j.heliyon.2024.e38244. eCollection 2024 Oct 15.
Mechanical alloying allows obtaining nonequilibrium structures in various systems, often possessing unique properties, including magnetic ones. Considering the unusual structural features of the magnetostrictive Fe-Ga alloy, this approach may be promising for this system. In this work, extensive experimental studies were carried out aimed at studying the features of mechanical alloying of Fe-Ga. The object of the study was the system Fe-20 wt% Ga in which disordered solid solution α-Fe(Ga) is formed. It was shown that high-intensity milling is an effective tool for mechanical alloying of solid-liquid binary system Fe-Ga, but a serious problem is a low powder recovery, less than 50 %. To solve this problem, various process control agents were tested. Their influence on powder recovery, process kinetics, particle size, carbon contamination, and magnetic properties was studied using a large set of techniques such as XRD, SEM, EDS, VSM, LIBS, and others. It has been shown that, based on a combination of factors, the optimal process control agent for this system is ethanol in an amount of 1 wt.
机械合金化能够在各种体系中获得非平衡结构，这些结构通常具有独特的性能，包括磁性性能。考虑到磁致伸缩铁镓合金不同寻常的结构特征，这种方法对该体系可能具有前景。在这项工作中，开展了广泛的实验研究，旨在探究铁镓合金机械合金化的特征。研究对象是Fe-20 wt% Ga体系，其中会形成无序固溶体α-Fe(Ga)。结果表明，高强度球磨是固液二元体系铁镓合金机械合金化的有效手段，但一个严重的问题是粉末回收率低，低于50%。为解决这一问题，对各种过程控制剂进行了测试。使用大量技术手段（如XRD、SEM、EDS、VSM、LIBS等）研究了它们对粉末回收率、过程动力学、颗粒尺寸、碳污染和磁性的影响。结果表明，综合考虑各种因素，该体系的最佳过程控制剂是含量为1 wt的乙醇。
