Hydroxyapatite coating on Ti-6Al-4V alloy by an electrolytic process and with heat-treatment

摘要

The effect of the heat-treatment on the calcium phosphate deposited on Ti-6Al-4V substrate by an electrolytic process has been investigated. The calcium phosphate were deposited in a 0.04M Ca(H_2PO_4)_2·H_2O (MCPM) solution on Ti-6Al-4V substrate at 60 ℃, 10V and 80 Torr for 1h, and calcined at different temperature for 4h. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterized the deposited samples. The XRD pattern of as-deposited sample contain the phase of dicalcium phosphate (DCPD) and HAP. When calcined at 400 ℃ for 4 h, the DCPD phase is vanished and HAP becomes the major phase. The XRD pattern reveals that the intensity of HAP and Ca_2P_2O_7 (CPP) decreases, but the β-TCP, CaO and rutile TiO_2 also shows up.