Co基非晶软磁合金薄带的制备和磁学性能

Preparation and Magnetic Property of Co-based Amorphous Soft Magnetic Alloy Ribbon

研究钴基非晶态软磁合金薄带的制备工艺,采用X射线衍射、透射电子显微镜分析非晶态合金条带的显微结构及非晶化程度,用差热分析法测量合金的玻璃转变温度和晶化温度,并研究其晶化行为,用振动样品磁强计(VSM)测量合金的静态磁学性能。结果表明,非晶态合金DTA曲线上有一个明显的吸热峰和两个明显的放热峰,合金的初始晶化温度为773K,第二个晶化温度为853K,说明该体系具有较强的热稳定性和非晶形成能力。在条带晶化过程的不同阶段,相组成不同,773K时是Co3B相和Co2Si相,823K和853K除了前面的两相外,又出现了Co2B相。非晶态Co73Si10B17合金在室温下呈现优异的软磁性能,不同退火工艺对磁性能有显著的影响。

The preparation technology of the soft magnetic Co-base alloy strip is investigated. The microstructure and amorphous extent are analyzed by X-ray diffraction and transmission electron microscopy. The glass forming temperature, crystallization temperature and crystallization behavior of the alloy are studied by differential thermal analysis. The static magnetic performance of the alloy is described by the vibration sample magnetism. The results indicate that there are one obvious heat absorption peak and two obvious exothermic peaks in the DTA curve of the alloy, and the initial crystalline temperature of the alloy is 773K, the second crystalline temperature is 853K. The alloy is with excellent hot stability and high glass forming ability. The different phases appear in different stages of the crystallization process. The dominant phases in the alloy are Co2Si and Co3B at 773K, furthermore, the new phase Co2B appears besides the formers at 823K and 853K. The Co73Si10B17 alloy presents the excellent soft magnetic characteristics under room temperature, and the annealed parameters have remarkable effects on the magnetic performance of the alloy.