Formation, structure and properties of magnetic bulk metallic glasses

磁性大块金属玻璃的形成、结构与性能

• 批准号: 5397301
• 负责人: Professor Dr.-Ing. Jürgen Eckert
• 金额: --
• 依托单位: Lehrstuhl für Materialphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5397301?language=en
• 关键词: Formation; structure; properties; magnetic; bulk

The interesting soft magnetic properties of multicomponent (Fe, Co) based bulk metallic glasses (BMGs) have been a great stimulus for research regarding their synthesis and physical properties. The purpose of the project is to develop new (Fe, Co)-based BMGs with improved glass-forming ability and good soft magnetic properties, and to understand the effect of preparation and processing conditions such as quenching rate, degree of overheating the melt prior to casting, melt purification by fluxing treatment, relaxation, nanocrystallization and stoichiometry variations/additions (e.g. P) on the phase formation and the resulting magnetic properties including domain structures. In addition, it is of interest to study the influence of external conditions like high pressure, low temperature, and external magnetic field on structure formation and the magnetic properties of the material. An additional motivation for the study is to determine how the soft magnetic properties of multicomponent BMGs compare to other conventional metallic glasses which require higher critical cooling rate for glass formation. Therefore, samples with different size and geometry will be prepared at different quenching rates in order to determine the correlation between phase formation, microstructure and soft magnetic properties.

多元(Fe，Co)基块体金属玻璃(BMG)所具有的有趣的软磁性质极大地刺激了人们对其合成和物理性质的研究。本项目的目的是开发具有更好的玻璃形成能力和良好软磁性能的新型(Fe，Co)基BMG，并了解制备和加工条件对相形成和由此产生的磁性能(包括磁畴结构)的影响，如淬速、铸造前熔体过热程度、熔剂处理净化熔体、松弛、纳米化和化学计量比变化/添加(例如P)。此外，研究高压、低温和外加磁场等外部条件对材料的结构形成和磁性能的影响也是很有意义的。这项研究的另一个动机是确定多组分BMG的软磁性能与其他传统金属玻璃相比如何，其他传统金属玻璃需要更高的临界冷却速度才能形成玻璃。因此，将在不同的淬火速度下制备不同尺寸和几何形状的样品，以确定相形成、微观结构和软磁性能之间的关系。