【作者】 董冰；

【导师】 晁月盛； 王晓伟；

【作者基本信息】 东北大学 ， 材料物理与化学， 2009， 硕士

【摘要】 非晶合金具有高磁导率、高饱和磁通量、低矫顽力、低铁损等优良磁性能,具有广阔的应用前景,是综合性能优异的软磁材料。越来越受到国内外研究人员的广泛关注。本论文主要做了以下几个方面的工作:（1）用真空电弧炉熔炼成分为(Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0、0.3、0.5,y=1及x=0.5,y=0）的母合金。（2）利用单辊法制备了(Fe_1-xCo_x)_89-yZr₇B₄Cu_y非晶薄带,辊速为42m/s,喷嘴口尺寸为2mm×0.3mm,压差为0.04MPa,厚度在30～50μm。通过XRD、MS表征制备态的(Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0、0.3、0.5,y=1及x=0.5,y=0）四种成分的非晶合金薄带。(Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0、0.3,y=1）两种成分非晶合金存在少量晶态相。(Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0.5,y=1及X=0.5,y=0）两种成分的合金为全非晶。（3）用差热分析对Fe₄₄Co₄₄Zr₇B₄Cu₁和Fe_44.5Co_44.5Zr₇B₄非晶合金进行热稳定性分析。Fe₄₄Co₄₄Zr₇B₄Cu₁和Fe_44.5Co_44.5Zr₇B₄非晶合金DTA曲线都有两个放热峰,表明晶化是分为两阶段进行。Fe₄₄Co₄₄Zr₇B₄Cu₁和Fe_44.5Co_44.5Zr₇B₄非晶合金初次晶化起始温度分别为499℃和506℃。对于(Fe_1-xCo_x)_89-yZr)7B₄Cu_y非晶合金,减少1at.%Cu使过冷液相区变宽了11℃,提高了(Fe_1-xCo_x)_89-yZr₇B₄Cu_y非晶合金的热稳定性。（4）对Fe₄₄Co₄₄Zr₇B₄Cu₁和Fe_44.5Co_44.5Zr₇B₄非晶合金进行磁脉冲处理,用MS分析脉冲处理后的微结构变化。MS结果表明经脉冲磁场处理后Fe_44.5Co_44.5Zr₇B₄非晶薄带存在少量的晶态相;晶化量随磁脉冲处理的场强和作用时间的增大而增大;内磁场方向随磁脉冲处理场强和作用时间的增加而逐渐趋向带平面沿带长方向。（5）对磁脉冲处理前后的Fe_44.5Co_44.5Zr₇B₄非晶合金用VSM进行磁性能测量。经磁脉冲处理的Fe_44.5Co_44.5Zr₇B₄非晶薄带（平行处理）,比饱和磁化强度（x方向测量）较淬态的Fe_44.5Co_44.5Zr₇B₄非晶薄带有所增加。更多还原

【Abstract】 Amorphous alloys with low coercivity H_c, large saturation inductions B_s, large resistivityand good thermal stability are the newest generation of soft magnetic materials. Itincreasingly appealed to widespread attention of domestic and foreign researchers. Thepresent paper has mainly done the following several aspect work.（1） Master alloy of (Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0、0.3、0.5, y=land x=0.5, y=0） wasobtained by vacuum arc furnace smelting equipment.（2） (Fe_1-xCo_x)_89-yZr₇B₄Cu_y amorphous alloy ribbons were cast by melt spinning of singleroll casting method. Roller speed is 42m/s. The nozzle size of quartz tube is 2mm×0.3mm.Pressure difference is 0.04MPa. The as-quenched (Fe_1-xCo_x)_89-yZr₇B₄Cu_y ribbons have thethickness in 30μm～50μm. The amorphous alloy ribbons were characterized by XRD andMS. The results indicated that (Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0、0.3, y=1） ribbons have occurredobvious crystallization, and (Fe_1-xCo_x)_89-yZr₇B₄Cu_y（x=0.5, y=1及x=0.5, y=0） ribbons arecompletely amorphous.（3） Using differential thermal analysis （DTA）, the thermal stability of Fe₄₄Co₄₄Zr₇B₄Cu₁and Fe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbons were studied. The results of DTA showed thatFe₄₄Co₄₄Zr₇B₄Cu₁ and Fe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbons both have two exothermicpeaks in the DTA curve respectively. The crystallization is divided into two stages. Initialtemperature of primary crystallization for Fe₄₄Co₄₄Zr₇B₄Cu₁ and Fe_44.5Co_44.5Zr₇B₄ amorphousalloy ribbons is 499℃and 506℃, respectively. For the (Fe_1-xCo_x)_89-yZr₇B₄Cu_y amorphousalloy, the undercooled liquid region broaden 11℃by reducing of 1 at.%Cu that enhanced thethermo-stability of (Fe_1-xCo_x)_89-yZr₇B₄Cu_y amorphous alloy.（4） The Fe₄₄Co₄₄Zr₇B₄Cu₁ and Fe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbons were treatedby low-frequency magnetic pulsing. After magnetic pulse processing, the microstructurechange was analyzed by the MS. The MS results showed that after magnetic pulse processing,Fe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbons exist some crystallizations and the quantity of crystallization increased along with the increasing of magnetic pulse intensity and treatmenttime. With magnetic pulse intensity and treatment time increased, the interior magnetic fielddirection gradually tended to the ribbons plane along the ribbons length direction.（5） The measure of the magnetic property of Fe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbonsbefore and after magnetic pulse processing had be tested by VSM. It indicated that thesaturation magnetization （measured along X-direction） of Fe_44.5Co_44.5Zr₇B₄ amorphous alloyribbons after magnetic pulse processing （parallel processing） is lager than that of as-quenchedFe_44.5Co_44.5Zr₇B₄ amorphous alloy ribbons.更多还原