多孔ZrO2/HA医用钛合金微弧氧化复合陶瓷膜层生物力学性能研究

为了获得具有生物力学性能的陶瓷膜层材料并满足临床医学上的需要。以Ti6Al4V钛合金为基体材料,通过微弧氧化工艺方法在电解液中制备氧化锆和羟基磷灰石复合陶瓷膜层材料。利用能谱分析仪和扫描电镜分析膜层结构特点。建立并改进了多孔性膜层力学性能数学模型,利用理论计算与实验测试相结合的方法对膜层相关生物力学性能进行了研究。实验结果表明,氧化锆/羟基磷灰石医用钛合金复合陶瓷能够取得比单一的羟基磷灰石陶瓷膜层更好的生物力学性能。生物陶瓷力学性能与孔隙率及生成的新相有关,通过实验与理论模型相结合的方法能够更好的对生物陶瓷膜层力学性能进行研究,所建立数学模型科学合理,具有一定理论意义。

Biomechanical Properties of Porous ZrO2/Hydroxyapatite Coating of Medical Titanium Alloy by Micro-Arc Oxidation

To gain ceramic coatings with biomechanical properties and meet the demand of clinical medicine, a (ZrO2)/hydroxyapatite (HA) composite ceramic coating was prepared by micro-arc oxidation in electrolyte with Ti6Al4V as substrate. The composition and the morphology of the coating were characterized by EDS and SEM, respectively. The mathematical model of biomechanics properties for the porous coatings was established and modified. The biomechanical properties of the coating were investigated by the combination of theoretical calculation and experiments. Results show that the (ZrO2)/HA composite coating of medical titanium alloy has better biomechanical properties than the individual hydroxyapatite ceramic coating. It is concluded that the mechanical properties and porosity of the bioceramic coating are related to the new phases. The mechanical properties of the ceramic coating can be better researched by the combination of theoretical model and experiments, and the established mathematical model is reasonable with certain theoretical meaning.