Vizureanu Petrica, Nabiałek Marcin, Sandu Andrei Victor, Jeż Bartłomiej
Faculty of Materials Science and Engineering, GheorgheAsachi Technical University of Iasi, Blvd. D. Mangeron 41, 700050 Iasi, Romania.
Department of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland.
Materials (Basel). 2020 Feb 12;13(4):835. doi: 10.3390/ma13040835.
The paper presents the results of research on the structure and magnetic properties of FeCoWYB alloys (where = 0, 1 or 2). The alloys were produced using two production methods with similar cooling rates: Injection casting and suction casting. The alloy samples produced were subjected to isothermal annealing at 940 K for 10 min. The structure of the materials was examined using X-ray diffraction. Isothermal annealing has led to the formation of various crystallization products depending on the chemical composition of the alloy and the structure of the alloy in a solidified state. In two cases, the product of crystallization was the hard magnetic phase YFeB. However, the mechanism of this phase formation was different in both cases. The magnetic properties of alloys were tested using a vibrating sample magnetometer and a Faraday magnetic balance. It is found that the grain crystallite size of the crystalline phases have a decisive influence on the value of the coercive field (especially in the case of hard magnetic phases). It has been shown that privileged areas can already be created during the production process. Their presence determines the crystallization process.
本文介绍了FeCoWYB合金（其中 = 0、1或2）的结构和磁性能的研究结果。这些合金采用两种冷却速率相似的生产方法制备：注射铸造和吸铸。所制备的合金样品在940 K下进行等温退火10分钟。使用X射线衍射对材料的结构进行了检测。等温退火导致根据合金的化学成分和凝固态合金的结构形成了各种结晶产物。在两种情况下，结晶产物是硬磁相YFeB。然而，在这两种情况下该相的形成机制是不同的。使用振动样品磁强计和法拉第磁天平对合金的磁性能进行了测试。发现晶相的晶粒微晶尺寸对矫顽场的值有决定性影响（特别是在硬磁相的情况下）。结果表明，在生产过程中就已经可以形成优先区域。它们的存在决定了结晶过程。
