Synthesis of core-shell Ti@Ni-P spherical powder by Ni electroless plating

Ni-P plated Ti powders with core-shell structure were prepared by Ni electroless plating. The micromorphology and growth mechanism of core-shell Ti@Ni-P powders were analyzed by field emission scanning electron microscopy (FESEM) with an energy dispersive spectrometer (EDS). The results show the overall uniformity of Ni-P coated Ti powders is improved by two pretreatments, namely NaOH preprocessing and alkaline electroless preplating, compared with a single alkaline electroless pretreatment. The surface morphology of the Ni-P plated powders is a typical spaced spherical nodular structure. Meanwhile, the growth mechanism of the Ni-P coated Ti powder is illuminated in detail.