| Abstract Scope |
The design of high-performance hard magnetic materials is crucial for actuation applications in aerospace systems. In this study, the purpose is to enhance the magnetic performance of metal-based lightweight spinodal topologies (STs) with the motivation of replacing rare-Earth metals. This is achieved by investigating the role of macro-scale geometry and micro-scale features on magnetic hysteresis behavior, with a specific focus on maximizing coercivity. Using a micromagnetic framework, topology optimization is performed to maximize magnetic hardness. Magnetic system is modeled by incorporating energy contributions, including exchange, demagnetizing, magnetocrystalline anisotropy, magnetostriction, and Zeeman interactions. The optimization is conducted at the macro-scale in terms of geometry (e.g., overall shape, void patterns), while the effects of the underlying microstructure (e.g., grain orientation, crystallographic texture) are considered in the systematical exploration of how topological features affect coercive field strength, saturation magnetization, and remanence. The optimization is guided by sensitivity analysis and finite-difference micromagnetic solvers (OOMMF). |