钛植入合金表面电化学沉积掺镁羟基磷灰石涂层

以Ca(NO3)2、(NH4)2HPO4和Mg(NO3)2为原料,采用电化学沉积法在医用钛合金表面制备了掺镁羟基磷灰石涂层,研究了电沉积工艺条件对掺镁羟基磷灰石涂层表面形貌的影响。结果表明,当电流密度为1.0mA/cm2,温度为65°C,pH为4.5,n(Mg):n(Ca)=1:3,电沉积时间为1300s时,得到了均匀致密的晶须状涂层。X射线衍射分析表明,烧结后的掺镁羟基磷灰石涂层中Mg2+取代了Ca2+,使HA涂层的晶格发生了变化。

Electrodeposition of magnesium-doped hydroxyapatite coating on surface of titanium implant alloy

A magnesium-doped hydroxyapatite(Mg-HA) coating was prepared by electrodeposition on the surface of medical titanium implant alloy with Ca(NO3)2,(NH4)2HPO4,and Mg(NO3)2 as raw materials.The effects of electro-deposition process conditions on the morphology of Mg-HA coating was studied.The results showed that Mg-HA coatings with uniform and dense crystal whiskers can be obtained under the following process conditions:current density 1.0 mA/cm2,electrodeposition temperature 65 °C,pH 4.5,Mg-to-Ca ratio 1:3,and electrodeposition time 1 300 s.X-ray diffraction analysis indicated that Ca2+ is substituted by Mg2+ in the Mg-HA coating after sintering,resulting in a change of the crystal lattice of HA coating.