Novel magnetic architectures for next generation electric vehicles

下一代电动汽车的新型磁性架构

• 批准号: 2276893
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2276893
• 关键词: Novel; magnetic; architectures; next; generation

The project will develop high performance permanent magnet materials based on Nd-Fe-B materials for automotive applications. This research will be guided by computer modelling being performed by another PhD student project. This will include the use of coatings, graded materials and investigation of novel microstructures and grain designs.Thin films will be deposited using a new multi-technique deposition system to develop new materials and microstructures. Novel powders will be fabricated using new powder processing facilities at the Department's Royce Translational Centre (including gas atomisation, powder milling and plasma spheroidisation) and create bulk specimens using spark plasma sintering (SPS) and vacuum sintering with aligned powder grains.We will use a new SQUID/VSM magnetometer (HRI funded; 7T magnetic field) to measure temperature-dependent magnetic properties. Crystal structure, microstructure and element distributions will be characterised using electron microscopy techniques (SEM, EDX, EBSD), glow discharge optical emission spectroscopy, X-ray diffraction and X-ray tomography; the latter will include central facilities beamtime applications to simultaneously characterise grain positions and orientations.The modelling that will guide this project will use finite element and finite difference micromagnetic packages with advanced microstructural generation to simulate magnetic properties. It will explore the effects of grain size, shape and boundaries, and compositional variation, secondary phases, diffusion effects and porosity. Finally, it will use micromagnetic simulation outcomes to inform large-scale FEM simulations for bulk property predictions. Materials properties established through the experimental programme will be fed back into the models.The project is supported by VW and will involve a three-month placement at their Research Centre in Wolfsburg, Germany.

该项目将开发用于汽车应用的基于Nd-Fe-B材料的高性能永磁材料。这项研究将由另一个博士生项目进行的计算机建模指导。这将包括使用涂层、梯度材料和研究新的微观结构和颗粒设计。薄膜将使用一种新的多技术沉积系统沉积，以开发新的材料和微观结构。新的粉末将使用新的粉末加工设施在该部门的罗伊斯转化中心（包括气体雾化，粉末研磨和等离子体球化）制造，并使用放电等离子体烧结（SPS）和真空烧结与对齐的粉末颗粒创建散装样品。我们将使用新的SQUID/VSM磁强计（HRI资助; 7 T磁场）来测量温度依赖的磁特性。晶体结构、微观结构和元素分布将使用电子显微镜技术进行表征（SEM、EDX、EBSD）、辉光放电发射光谱、X射线衍射和X射线层析成像;后者将包括中央设施的束流时间应用程序，以同时确定晶粒的位置和方向。指导这个项目的建模将使用有限元和有限差分微磁软件包，微结构生成以模拟磁性。它将探讨晶粒尺寸，形状和边界，成分变化，第二相，扩散效应和孔隙度的影响。最后，它将使用微磁模拟结果为大规模有限元模拟提供信息，以预测体特性。通过实验项目建立的材料特性将被反馈到模型中。该项目由大众支持，将在其位于德国沃尔夫斯堡的研究中心进行为期三个月的实习。