论文部分内容阅读
本文研究了铁基超微晶软磁合金FeCuNbSiB的微观结构和磁性能的关系,试图揭示超微晶铁基合金取得优异软磁性的机制。用改变热处理条件的办法,在520～700℃之间对淬态非晶合金进行等温热处理后,均获得晶粒大小为10～40nm的主相为α-FeSi固溶体相的超微晶结构。处理温度在520-600℃之间的试样均具有优良的软磁特性,高于600℃样品磁性开始恶化。α-FeSi固溶体的晶粒尺寸在520～620℃之间等温退火后均无明显变化,最佳磁性能对应的退火温度范围与晶粒尺寸对应的温度范围并不相同,表明超微晶合金的磁性虽与晶粒尺寸密切相关,此外晶粒边界相也直接影响其磁性。
In this paper, the relationship between the microstructure and magnetic properties of FeCuNbSiB iron-based ultrafine-grained soft magnetic alloys was studied in order to reveal the mechanism of excellent soft magnetic properties of ultrafine-grained iron-based alloys. By changing the conditions of the heat treatment, the as-received amorphous phase of the as-grown amorphous alloy is heat-treated at 520 to 700 ° C. to obtain the ultrafine-crystalline structure of the α-FeSi solid solution phase having a crystal grain size of 10 to 40 nm . The samples with the temperature between 520-600 ℃ have excellent soft magnetic properties, and the magnetic properties of the samples above 600 ℃ begin to deteriorate. The grain size of the α-FeSi solid solution did not change significantly after the isothermal annealing at 520-620 ℃. The temperature range corresponding to the optimum magnetic properties corresponding to the grain size was not the same, indicating that the micro-crystalline alloy Although the magnetism is closely related to the grain size, in addition, the grain boundary phase also directly affects the magnetism.