钛合金表面声电沉积/碱热处理法制备HA涂层研究  

Improved HA Coating on NaOH Pretreated Ti6-Al-4V Prepared by Sonoelectrodeposition

作　　者：熊信柏[1] 邹春莉[1] 曾燮榕[1] 黎晓华[1] 谢盛辉[1] 

机构地区：[1]深圳大学深圳特种功能材料重点实验室,广东深圳518060

出　　处：《稀有金属材料与工程》2007年第A02期742-744,共3页Rare Metal Materials and Engineering

基　　金：深圳大学科研启动基金(200629-4XXB)

摘　　要：为了使钛合金(Ti-6Al-4V)具有生物活性,可在其表面施加生物活性羟基磷灰石(HA)涂层。对比了声电沉积法和碱热处理法实验结果,采用扫描电镜(SEM)、X射线衍射仪(XRD)、电子能谱(EDS)、傅立叶红外透射光谱(FTIR)以及划痕测试等进行了分析。结果表明,直接采用声电沉积法在钛合金表面制备的羟基磷灰石涂层,经热处理后存在龟裂剥落现象;通过碱热处理法,对钛合金基体表面进行预处理,然后,借助声电沉积法,在钛金属表面沉积了透钙磷石涂层,经热碱液处理转变成的羟基磷灰石涂层,涂层完整,未出现剥落。经进一步高温烧结处理,所制涂层仍呈片状形貌,其由部分含钠的羟基磷灰石组成,而且HA涂层破坏的临界载荷未烧结前的4.365 N提高至烧结后的8.175N。In order to endow Ti6-Al-4V with bioactivity, hydroxyapatite （HA） was coated by sonoelectrodeposition method. However, rimous cracks occured in the HA coating after heat treatment. So, NaOH treatment was firstly made to reduce the difference of thermal expansion coefficient between titanium and HA. Secondly, brushite coating was deposited on NaOH treated titanium alloy and then convert to HA coating by IM NaOH solution at 40℃ .finally, the obtained HA coating was sintered at 600℃. Scanning electron microscopy （SEM）, X-ray diffraction （XRD）, were used to characterize the coatings and the mechanical properties of the layer was measured by the scratch test, the results showed improved HA coating which the critical load was increased from 4.365N to 8.175N before and after sintering.

关 键 词：TI6AL4V 羟基磷灰石 涂层 声电沉积 碱热处理 

分 类 号：TG174.4[金属学及工艺—金属表面处理]