In this study, the surface morphology of Zn-containing hydroxyapatite (Zn-HA) electrochemically deposited on
Ti–xNb alloys was investigated using various experimental techniques. Ti alloys containing from 10 to 50 wt.%
Nb were manufactured in a vacuum arc-melting furnace. The Zn-HA layers were grown by electrochemical
deposition at 85 °C on the Ti–xNb alloy surface in a solution containing Ca, Zn, and P ions. The microstructures
of the Ti–xNb alloys changed from a needle-like structure to an equiaxed structure with increasing Nb content.
The phases and morphologies for the Zn-HA layers were influenced by the Zn ion content. The HA and Zn-HA
layers formed denser microstructures with increasing Nb content. The nano-scale morphologies of the Zn-HA
layers changed from a rod-like structure to a network-like structure.