Magnetic Properties, Microstructure and Corrosion Resistance of Ce doped Sm1 xCex(CobalFe0.14Cu0.07Zr0.05)7.5 Magnets
The influence of the Ce content and the relation among the magnetic properties, corrosion resistance and microstructure of the Sm1 xCex(CobalFe0.14Cu0.07Zr0.05)7.5 magnets are systemically studied. The enhanced magnetic properties (Br 11.01 kG, Hcj 15.5 kOe, and (BH)max 30.1 MGOe) have been obtained with the slight Ce doped (x 0.1) The lower values of the corrosion potential Ecorr and corrosion current density icorr for the Ce doped magnet indicate that electrochemical corrosion rate of the Ce doped magnet slows down and the corrosion resistance of the magnet is stronger. The microstructure results show that the Ce doped magnet obtains a more uniform cellular structure with the smaller cell size and the homogeneous cell boundary phase, while the content of the Ce shows no observable difference between the cell and cell boundary.