Compact nanocrystalline soft magnets using Field-Assisted Sintering

使用场辅助烧结的致密纳米晶软磁体

• 批准号: 500498139
• 负责人: Professor Dr.-Ing. Christoph Broeckmann
• 金额: --
• 依托单位: Standort Dresden
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/500498139?language=en
• 关键词: Compact; nanocrystalline; soft; magnets; using

This applied transfer project is based on a successfully completed DFG project with the Priority Programme SPP 1959, which studied the simulation of temperature distribution and grain growth during field-assisted sintering technology (FAST/SPS). The know-how obtained in the completed project will be transferred to an industrial application in the applied project. This project will start at technology readiness level (TRL) 4. The developed numerical model will be the fundamental basis for further developments in the application-oriented field of manufacturing compact nanocrystalline soft magnets. In this transfer project, FAST/SPS will be used for the processing of compact nanocrystalline soft magnets (Finemet Fe73.5Cu1Nb3Si15.5B7 (at.%)) in order to produce soft magnetic components with geometric diversity, high power density, and low hysteresis and eddy current losses. The compact design makes the typical plastic housing of the commercial wounded cores unnecessary which allows the operation of the components at up to 300°C, instead of 150°C. These improvements are currently of extraordinary interest for the miniaturization and the efficient energy conversion in the field of soft magnets. The compacted materials should be able to be manufactured into different inductive components depending on their magnetic permeabilities, so that a wide range of applications is possible. Preliminary investigations showed that the processing of amorphous flakes made from melt spun ribbons could help to achieve promising properties of the products, as the soft magnetic properties can be directly adjusted by selecting suitable flake sizes for manufacturing. However, the flakes with different size distributions could lead to completely different temperature distributions in the compaction process, which results in inhomogeneous microstructures. Therefore, to assure a homogenous temperature distribution within the required temperature window, the numerical simulation is necessary. The gained knowledge and the developed methods from the completed DFG project provide a solid basis for the processing of compact nanocrystalline soft magnetic components and the industrial application in this transfer project. With the further developed models, the conceptual ideas for the homogenization of the temperature distribution and the compaction of soft magnetic material during FAST/SPS will be tested in virtual, iterative simulation loops, and subsequently applied in the manufacture of the demonstrator. In this way, the currently well-employed trial and error methodology can be replaced by a straightforward procedure which saves time, recourses and cost.

这一应用转移项目是基于一个成功完成的DFG项目，优先计划SPP1959，该项目研究了现场辅助烧结技术(FAST/SPS)中的温度分布和晶粒生长的模拟。在完成的项目中获得的技术诀窍将在应用项目中转移到工业应用中。该项目将从技术准备水平(TRL)4开始。所开发的数值模型将为面向应用的致密纳米晶软磁体制造领域的进一步发展奠定基础。在这一转让项目中，FAST/SPS将用于加工紧凑的纳米晶软磁体(Finemet Fe73.5Cu1Nb3Si15.5B7(at.%))，以生产具有几何多样性、高功率密度、低磁滞和涡流损耗的软磁元件。紧凑的设计使商业受伤磁芯的典型塑料外壳变得不必要，允许部件在高达300°C而不是150°C的条件下运行。这些改进目前对软磁体领域的小型化和高效能量转换非常感兴趣。压实材料应该能够根据其磁导率制造成不同的电感元件，从而有可能得到广泛的应用。初步研究表明，由于可以通过选择合适的薄片尺寸来直接调整软磁性能，因此对由熔体快淬薄带制成的无定形薄片的加工可以帮助获得良好的产品性能。然而，不同尺寸分布的鳞片在压制过程中会导致完全不同的温度分布，从而导致组织的不均匀。因此，为了保证在所要求的温度窗口内得到均匀的温度分布，数值模拟是必要的。完成的DFG项目所获得的知识和开发的方法为紧凑型纳米晶软磁元件的加工和该转移项目的工业应用奠定了坚实的基础。随着进一步开发的模型，FAST/SPS过程中软磁材料温度分布的均化和压实的概念想法将在虚拟的迭代模拟循环中进行测试，并随后应用于演示器的制造。通过这种方式，可以用一种节省时间、资源和成本的简单程序来取代目前广泛使用的试错法。