软磁性Co基块体非晶合金的研究进展

Research Progress in Soft⁃magnetic Co⁃based Bulk Metallic Glasses

Co基非晶合金不仅具有高热稳定、高强度、硬度,还显示出优异的软磁特性如低矫顽力、高磁导率、低铁损、低磁致伸缩系数等,尤其是高频下的导磁率、铁损性能极佳,有着重要的工业应用价值。但相对于软磁性Fe基非晶合金,Co基的合金体系较少、玻璃形成能力(GFA)和饱磁感应强度较低而影响了它们的广泛应用。近年,材料工作者研发出了一系列Co基块体非晶合金体系,并对它们的非晶形成机理、GFA、过冷液态稳定性、结晶化行为、磁性及力学性能等进行了广泛、深入的研究。本文对软磁性Co基块体非晶合金的研究进展进行了简述,并展望了其今后的发展方向。

Co⁃based metallic glasses possess high thermal stability,high strength and hardness,and excellent soft magnetic properties including low coercivity,high permeability,low core loss,and low saturation magnetostriction.Especially,the remarkably high permeability and low core loss in high frequency make the Co⁃based metallic glasses great values in industrial application.In comparison with Fe⁃based metallic glasses,the alloy systems of the Co⁃based metallic glasses are fewer,and the glass⁃forming ability(GFA)and saturation magnetization are lower,which limit the scope of application.In recent years,materials researchers have developed series of Co⁃based bulk metallic glass(BMG)systems,and conducted extensive and in⁃depth research on the glass⁃forming mechanism,GFA,supercooled liquid stability,crystallization behavior,magnetic and mechanical properties of the Co⁃based BMGs.In this paper,we have reviewed the research progress in the soft⁃magnetic Co⁃based BMGs,and discussed the development orientations of the Co⁃based BMGs in the future.