Research on the Latest Nucleation of Electroless Ni-Cu-P Coatings Deposited on NdFeB Permanent Magnet

Aiming at knowing the process of the latest nucleation of electroless Ni-Cu-P alloy on the surface of the NdFeB magnet material, this paper studied the process by the means of designing different time order (10min, 20min, 40min, and 60min). The findings indicated that the morphology of the plating coating gradually changed from irregular shape into regular cellular shape until the mirror-like amorphous alloy coatings were formed with the P content increasing during the later period of plating. The formation mechanism of amorphous coatings prepared by electroless plating could be seemed as continuous transition of structure changing from crystalline structure to mixed crystalline structure and then amorphous structure.