脉冲磁场处理Fe_(52)Co_(34)Hf_7B_6Cu_1非晶的低温真空退火效应

EFFECT OF LOW-TEMPERATURE VACUUM ANNEALING ON THE MAGNETIC PULSED AMORPHOUS Fe_(52)Co_(34)Hf_7B_6Cui ALLOY

对Fe_(52)Co_(34)Hf_7B_6Cu_1非晶合金进行了低频磁脉冲处理,研究低温真空退火对磁脉冲处理Fe_(52)_Co_(34)Hf_7B_6Cu_1非晶软磁性能的影响.结果表明,磁脉冲处理导致非晶合金发生纳米晶化,析出晶态相α-Fe(Co),晶粒尺寸为5-10 nm,形成的纳米晶粒弥散分布于非晶基体的双相纳米合金中.对磁脉冲处理的试样进行低温真空退火,可以进一步优化纳米合金的软磁性能,在100℃退火可以得到最佳的软磁性能.

The nanocrystalline Fe_（52）Co_（34）Hf_7B_6Cu_1 soft magnatic alloys composed of bcc-Fe nanocrystals embedded in a residual amorphous matrix were obtained by the magneto-crystallization of melt-spun ribbons.In order to improve the soft magnetic properties of double-phase Fe（Co）-based nanocrystalline alloy,the nanocrystalline alloy specimens were vacuum annealed for 30 min at 100, 200 and 300℃.The results showed that the treatment of magnetic pulsing on the amorphous alloy resulted in the nanocrystallization,the grain size of precipitatedα-Fe（Co） nanocrystallized phase was 5—10 nm.The low-temperature vacuum annealing of magnetic pulsed specimens further improved the soft magnetic properties of nanocrystalline alloy.The influence of annealing at 100℃for 30 min on the properties is most obvious.