脉冲电化学沉积制备n-HA/ZrO2复合涂层

Preparation of n-HA/ZrO2 Composite Coating by Pulsed Electrochemical Deposition

摘要:

用脉冲电化学沉积法在生物医用钛金属表面成功制备了纳米HA/ZrO2复合涂层，涂层中的成分均以离子形式沉积到基材上，得到ZrO2均匀分布的HA/ZrO2复合涂层。脉冲电位为–3.5 V时有利于离子的沉积结晶，有利于复合涂层的沉积。复合涂层的成分、结构、形貌及生物活性等的研究结果表明：复合涂层烧结前成分为HA、OCP及碱式硝酸锆，高温烧结后得到均匀致密HA/ZrO2复合涂层。检测表明HA/ZrO2复合涂层能够诱导磷灰石生成，具有较好的生物活性。

Abstract:

Dense and uniform HA/ZrO2 composite coatings were prepared on biomedical titanium surfaces by Pulsed Electrochemical Deposition. The composite coatings were deposited in the form of ions and ZrO2 was uniformly dispersed in the composite coatings. The pulse potential with –3.5 V was beneficial to ion deposition recrystallization, to composite coating deposition. The compositions, structures, morphologies and bioactivity were characterized. The results showed that the coating compositions included hydroxyapatite (HA), octacalcium phosphate (OCP) and alkaline zirconium nitrate after electrodeposition and then they transformed into HA/ZrO2 composite coatings after high temperature sintering. Simulated body fluid immersion test proved that the as-prepared composite coatings had good bioactivity to induce calcium phosphate under simulated physiological environment.