Tailoring crystal orientation and property of Cu−Co immiscible alloy during solidification under high magnetic field

Non-equilibrium solidification experiments were conducted on Cu₅₀Co₅₀ alloys under different magnetic field intensities to investigate the orientation, microstructure evolution, and magnetic properties of the Co-rich phase. The results revealed that the phase-separated rod-like Co-rich phase can realize the alignment morphology and can be oriented with the 〈111〉 crystal direction along the direction of the 5 T high magnetic field (HMF). In contrast, the orientation of the Cu-rich phase, which underwent secondary liquid−liquid phase separation, was not significantly affected by the HMF. The alloy solidified at 0 T showed near-magnetic isotropic behavior, while the alloy solidified at 5 T displayed magnetic anisotropic behavior. The saturation magnetization of the alloy increased slightly, and the coercivity decreased correspondingly, which were strictly dependent on the orientation evolution of the Co-rich crystal.