以高Fe浓度（＞80 at.%）的Fe-Si-B-P-Cu合金为对象，研究微量过渡金属（Mo、Nb、Zr、V等）、少量相似强磁性（Co、Ni、Mn）及非金属C元素的添加对其非晶合金的热稳定性、非晶形成能力以及磁性能的影响，建立合金成分、非晶形成临界尺寸及磁性能间的关联，揭示添加元素对合金非晶形成能力影响规律与内在机制，获得高非晶形成能力的合金成分。利用组织结构表征与相变动力学分析等手段，研究添加元素对Fe-Si-B-P-Cu非晶合金晶化行为的影响，阐明添加元素影响非晶合金晶化行为的机理，建立相应的纳米晶化模型。通过系统研究热处理工艺参数对非晶合金的晶化组织结构及磁性能影响规律，澄清其软磁性能、组成和组织结构间的相关性，阐明合金元素影响合金晶化组织结构与软磁性能的机理。为发展具有工业实用性的高饱和磁感应强度纳米软磁合金提供理论依据和工艺技术支撑。

The present proposal is devoted to a comprehensive study of the alloying effects of a minor amount of transition metals (Mo, Nb, Zr, V, etc.), a small amount of ferromagnetic like-elements (Co, Ni or Mn) and metalloid C on the thermal stability, amorphous-forming ability (AFA) as well as the soft magnetic properties of the Fe-Si-B-P-Cu alloys with high Fe concentrations (>80 at.%). The correlation between the composition, critical thickness for amorphous formation, and magnetic properties is to be established first for the amorphous alloys, and the optimal amorphous alloy compositions are proposed. The roles of alloying elements on the AFA will be clarified. The crystallization behaviors of these precursor amorphous alloys are then examined to reveal the underlying mechanism of minor alloying on the nano decomposition, and the nanocrystallization models will be put forth. Finally, the influence of the various control parameters of heat treatment on changing the crystallization kinetics as well as the crystallization products, and hence the magnetic properties of the nanocrystalline alloys with different grain sizes will be systematically investigated, from which the correlation of composition - microstructure - soft magnetic properties is to be established for these soft magnetic nanocrystalline alloys. The present study would provide theoretical and technical guidelines for the development of industrially applicable soft magnetic nanocrystalline alloys with high saturation magnetization.