Tailoring magnetism of High Entropy Alloys by high energy ball milling

该方案旨在通过高能球磨(HEBM)制备均匀的微米级高熵合金(MagHEA)颗粒，并从这些具有大磁化强度和高居里温度的烧结块体材料中获得。此外，这项研究将为具有化学和机械稳定性的软磁和硬磁HEA材料的有效、可扩展的加工路线提供指导。在加工的所有阶段，我们将把单个颗粒、粉末和固结材料的形态、微结构、化学成分和均匀性与所获得的磁性相关联。通过透射和扫描电子显微镜和光谱学，将获得最先进的高分辨率结构和化学图谱。最终，我们希望了解如何通过控制工艺参数来优化磁性能(居里温度、磁化强度和矫顽力)。我们将集中在以下基本成分上：a)CrFeCoNi和b)CrMnFeCo，其中我们添加了x=0.5和x=1的Alx、Gax或Inx

The proposal aims at producing homogeneous, micron-sized high entropy alloy (magHEA) particles by high energy ball milling (HEBM)and from these sintered bulk materials with a large magnetization and high Curie temperature. Furthermore, the study will provide a guideline for an effective, up-scalable processing route of soft and hard magnetic HEA materials with chemical and mechanical robustness. At all stages of processing we will correlate morphology, microstructure, chemical composition and homogeneity with magnetic properties which are obtained for single particles, powders and consolidated materials. State-of-the-art high resolution structural and chemical maps will be obtained by transmission and scanning electron microscopy and spectroscopy. Ultimately, we want to achieve an understanding how to optimize the magnetic properties (Curie temperature, magnetization and coercivity) by control of the process parameters We will focus on the following base compositions: a) CrFeCoNi and b) CrMnFeCo to which we add Alx, Gax or Inx with x = 0.5 and x=1