钛合金表面电泳沉积氟羟基磷灰石涂层

Fluorohydroxyapatite Coating on Titanium Alloy Surface by Electrophoretic Deposition

采用沉淀法制备了氟掺杂的氟羟基磷灰石（FHA,Ca10（PO4）6OH2–xFx（x=0～2））粉体,并采用电泳沉积在钛合金（Ti6Al4V）表面制备了FHA涂层。通过改变沉积电压、时间及电极间距获得不同沉积量的涂层,采用X射线衍射、扫描电子显微镜研究了电压、时间、电极间距以及热处理对涂层形貌、物相组成和涂基结合强度的影响,确定制备FHA涂层的最佳沉积工艺和热处理制度。结果表明：控制沉积电压15 V、沉积时间1 min、电极间距1 cm的条件下沉积涂层并在N2气氛下900℃保温1 h热处理可制得涂层质量好,涂基结合强度高的FHA生物陶瓷涂层。

Fluorhydroxyapatite （FHA, Ca10（PO4）6OH2-xFx（x=0-2）） powder was synthesized by a precipitation method. The FHA coating was prepared on the surface of the titanium alloy （i.e., Ti6AlaV） via electrophoreticdeposition. The coatings with different deposition contents were obtained by changing the deposition voltage, time and electrode spacing. The influences of deposition voltage, time, electrode spacing and thermal treatment on the surface morphology, phase composition and bonding strength of coating were investigated by X-ray diffraction and scanning electron microscopy. The FHA coatings can be obtained under the optimized deposition process and thermal treatment （i.e., voltage of 15 V, deposition time of 1 min and electrode spacing of 1 cm）. The FHA bioceramic coating with a good quality and a high bonding strength can be prepared after thermal treatment in N2 gas at 900 ℃ for 1 h.