冷却速度对快淬Fe-Si-B-Cu合金结构和磁性能的影响
Effect of Quenching Rate on Microstructure and Magnetic Properties of Melt-spun Fe-Si-B-Cu Alloy Ribbons
李宇明, 余红雅, 刘仲武, 曾德长
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作者单位：华南理工大学 材料科学与工程学院, 广东 广州 510640
中文关键字：冷却速度； 非晶； 微观结构； 磁性能
英文关键字：quenching rate; amorphous; microstructure; magnetic property
中文摘要：采用单辊旋淬法，以不同的轮辊转速(50、40、30和25 m/s)制备高Fe含量Fe82.65Cu1.35Si2B14非晶合金薄带，研究了冷却速度对快淬合金结构和性能的影响。结果表明：随冷却速度的降低，淬态Fe82.65Cu1.35Si2B14合金的条带厚度逐渐增大，合金由完全的非晶态结构转变为非晶与纳米晶的混合结构；同时，随冷却速度的降低，一次晶化温度下降，材料的饱和磁感应强度逐渐增加，在轮辊转速为25 m/s时，淬态合金的饱和磁感应强度达到1.4 T。
英文摘要：Amorphous Fe82.65Cu1.35Si2B14 alloy ribbons were prepared by single-roller melt spinning method using various roller speeds of 50 m/s, 40 m/s, 30 m/s and 25 m/s. The effects of quenching rate on the microstructure and magnetic properties of high Fe content melt-spun ribbons were investigated. The results show that with the decrease of quenching rates the ribbon thickness increases and the ribbon structure completely changes from amorphous phase to a mixed structure of amorphous and nano-crystalline phases. It is also found that the primary crystallization temperature decreases and the saturation magnetization increases with the decrease of quenching rate. The saturation magnetization of the ribbon prepared at 25 m/s is about 1.4 T.