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Zr对CoFeNbB非晶软磁合金的热稳定性及磁性能的影响

Influence of Zr on the thermal stability and magnetic properties

中文摘要英文摘要

采用单辊法制备了Co45Fe25-xZrxNb10B20 (x=0, 2, 4at%)非晶合金,借助X射线衍射、差热分析以及振动样品磁强计等手段研究元素Zr对制备合金的非晶形成能力、热稳定性、晶化行为以及磁性能的影响。研究结果表明: 添加少量Zr能提高Co45Fe25-xZrxNb10B20合金的非晶形成能力及其热稳定性: 随着Zr含量的增加, 初始晶化温度由853K提高至936K, 过冷液相区间由31K提高到55K。同时研究发现元素Zr细化了母合金铸锭凝固组织, 这有利于非晶的形成。随着Zr含量的增加, 其饱和磁感应强度从0.58T降低至0.53T, 矫顽力从9.5A/m 降低至6.8A/m。此外,采用非等温DSC方法,用Kissinger方程计算了Co45Fe21Zr4Nb10B20非晶合金的玻璃转变和初始晶化的表观激活能,分别为720.3kJ/mol和424.5kJ/mol。

he Co45Fe25-xZrxNb10B20 (x=0, 2, 4at%) amorphous alloy ribbons were prepared by melt spinning. The effect of Zr addition on the glass-forming ability, thermal stability, crystallization kinetics and magnetic properties of Co45Fe25-xZrxNb10B20 amorphous alloys were studies by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and vibration sample magnetometer survey. The results show that the addition of small amount of Zr improves the GFA and thermal stability of the alloys, and with the increase of Zr content, the temperature of the onset crystallization (Tx1) and supercooled liquid region (ΔTx) increase from 853 K to 936 K and from 31 K to 55 K, respectively. It is found that the master ingot microstuctures become finer by the addition of Zr, which makes the formation of glassy phase easier. With the increase of Zr content, saturation magnetic induction intensity decreases from 0.58T to 0.53T and coercive force decreases from 9.5 A/m up to 6.8 A/m. Based on the data measured from continuous heating DSC, the glass transition and onset crystallization activation energies of Co45Fe21Zr4Nb10B20 amorphous alloy have also been studied by Kissinger’s method, of which are 720.3kJ/mol and 424.5 kJ/mol, respectively.

何世文、李占涛、刘咏、吴宏、黄伯云

有色金属冶炼金属学、热处理

o基非晶合金非晶形成能力铸锭组织热稳定性磁性能

o-based amorphous alloyglass-forming abilityingot microstructurethermal stabilitymagnetic properties

何世文,李占涛,刘咏,吴宏,黄伯云.Zr对CoFeNbB非晶软磁合金的热稳定性及磁性能的影响[EB/OL].(2007-12-04)[2025-08-25].http://www.paper.edu.cn/releasepaper/content/200712-17.点此复制

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