氧杂质对软磁非晶合金的原子团簇和性能的影响规律

Soft magnetic amorphous alloys which are widely used in the field of transformers, inductors, reactors and other products, are the kind of green materials for the country to develop rigorously. However, our industries for mass production of soft magnetic amorphous alloys are currently encountering numerous technical and technological bottleneck problems, such as the variation in the glass-forming ability and magnetic properites caused by the inevitable introduction of oxygen impurities during industrial production of soft magnetic metallic glasses. In view of this, the National Natural Science Foundation of China called for cluster-projects to support research on "development of high performance, large sized soft magnetic amorphous materials" in 2015. Under this background, this project intends to systematically investigate effects of oxygen impurities (i.e., oxygen and oxides) on atomic clusters, glass-forming ability and soft magnetic properties of representative Fe-based metallic glasses, and then reveal the underlying atomistic mechanisms. On the basis of these studies, approaches for alleviating or eliminating the harmful effects of impurities on the glass-forming abilities and soft magnetic properties will be pursued. By initiating this project, on one hand, the relationship between atomic structure and glass-forming ability as well as soft magnetic performance will be deepened. On the other hand, alloy design principles for impurities control will be established for mass production of Fe-based amorphous alloys with low cost, high glass-forming ability and better performance. Completion of our project is of critical importance for extending the industrial application range of Fe-based amorphous alloys.

软磁非晶合金广泛应用于变压器、互感器、电抗器等电力电子领域，是国家大力发展的绿色节能材料。但目前我国软磁非晶合金工业化生产中面临众多技术和工艺的瓶颈问题，譬如生产过程中不可避免的引入氧杂质造成非晶形成能力和软磁性能的波动。鉴于此，金属材料处2015年设立了面上基金集团项目群支持“高性能、大尺寸非晶软磁材料的关键科学问题”研究。在此背景下，本项目拟系统研究氧杂质 （氧及氧化物）对软磁非晶合金原子团簇、非晶形成能力和软磁性能的影响规律，在原子层次下理解作用机理。在此基础上,研究改善或者消除杂质对非晶形成能力和软磁性能影响的调控机制。项目的开展一方面可以加深对非晶合金原子结构、非晶形成能力以及性能之间关联的理解，丰富有关非晶研究的理论成果，另一方面也可以为制备低成本、高性能的软磁非晶合金的工业生产提供理论指导，对扩大软磁非晶合金的工业应用具有重要意义。

软磁非晶合金广泛应用于变压器、互感器、电抗器等电力电子领域，是国家大力发展的绿色节能材料。但目前我国软磁非晶合金工业化生产中面临众多技术和工艺的瓶颈问题，譬如生产过程中不可避免的引入氧杂质造成非晶形成能力和软磁性能的波动。在此背景下，本项目系统研究了氧杂质 （氧及氧化物）对软磁非晶合金原子团簇、非晶形成能力和软磁性能的影响规律，在原子层次下理解作用机理。在此基础上,研究了改善或者消除杂质对非晶形成能力和软磁性能影响的调控机制。项目的开展一方面加深了对非晶合金原子结构、非晶形成能力以及性能之间关联的理解，丰富了有关非晶研究的理论成果，另一方面也为制备低成本、高性能的软磁非晶合金的工业生产提供理论指导，对扩大软磁非晶合金的工业应用具有重要意义。本项目按照研究计划完成了预定研究目标，并发表论文56篇，申请专利7项，培养博士生3名，硕士生6名。