摘要
为提高钛合金(Ti-6Al-4V)的生物活性及与生物组织的粘附特性,本研究利用CO2激光器修饰钛合金基体的表面特性并制备了梯度磷酸钙复合涂层。利用扫描电镜(SEM)、X射线衍射(XRD)和电子探针(EPMA)等对复合涂层及界面的显微组织、相组成及成分进行了分析,并分别通过7、14、28天的模拟体液浸泡实验(SBF)对激光熔覆磷酸钙复合涂层表面的类骨磷灰石能力进行了研究。结果表明:磷酸钙涂层与钛合金基体紧密结合。涂层表面存在均匀且具生物活性的物相,如羟基磷灰石(HA)、β-磷酸三钙(β-TCP)等。复合涂层的截面形态呈现渐变趋势。此外,SBF浸泡实验表明激光熔覆磷酸钙复合涂层比未经处理钛合金基材具有更有利的类骨磷灰石生成能力。
To improve the bioactivity and adhesion characteristics with biological tissue of titanium alloy(Ti-6Al-4V),CO2 laser treatment was used to modify the surface properties and the gradient calcium phosphate composite coating was fabricated on titanium alloy substrate.The morphology of surface and cross-section was observed by scanning electron microscope(SEM).Phase composition and the elemental distribution of the coating were analyzed by X-ray diffraction(XRD) and electron probe microanalysis(EPMA).The bone-bonding ability of laser-cladded calcium phosphate composite coating was evaluated in vitro by soaking in a simulated body fluid(SBF) for 7,14,28 d.And the characteristics and formation mechanism of laser-cladded calcium phosphate coating were investigated.The results indicate that the calcium phosphate coating is closely bonded to the titanium alloy substrate.The surface of the coating is homogeneous of well phase composition,which contains such bioactive phases as hydroxyapatite(HA) and β-tricalcium phosphate(β-TCP).And the distribution of morphology on the cross-section of composite coating has a gradual variation.Furthermore,SBF test reveals that the laser-cladded composite coating has more favorable formation ability of bone-like apatite compared with the surface of untreated titanium alloy substrate.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第S2期55-58,共4页
Rare Metal Materials and Engineering
关键词
生物材料
显微结构
涂层
激光
biomaterials
microstructure
coating
laser
