碱液处理钛合金表面软复合磷酸钙层

Surface Softly Compounding of Calcium Phosphate Layer in Alkali Treated Titanium Alloy

摘要:

钛合金（Ti6Al4V)经过NaOH碱液处理后表面形成了多孔网状、弱结晶的钛酸钠凝胶层；随碱液浓度和处理时间增加，孔的尺寸增加。钛酸钠凝胶层可在快速钙化溶液中诱导沉积出（002）取向的磷酸八钙和／或磷灰石；而在模拟体液中诱导沉积出无取向的骨状磷灰石。碱液处理条件和钙磷溶液的离子种类、浓度和pH值是影响钛合金软复合磷酸钙层成分和沉积速度的两个因素。

Abstract:

Porous network of weakly crystallized sodium titanate gel layer was formed on the surface of titanium alloys (Ti6Al4V) after treated by NaOH alkali solution. The pore size increases with the alkali concentration and treating time. The sodium titanate gel layer can induce the deposition of octacalcium phosphate and /or apatite orientated along (002) plane from the fast calcification solution, and bone like apatite layer from the simulated body fluid without orientation. The two factors responsible for the composition and depositing speed of the softly compounded calcium phosphate layer on alkali treated titanium alloy are the alkali treatment conditions and the ion species, their concentrations and the pH value of the calcium phosphate solution.