College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, People's Republic of China.
J Mater Sci Mater Med. 2011 Oct;22(10):2261-71. doi: 10.1007/s10856-011-4418-0. Epub 2011 Aug 21.
The sub-micron glass-ceramic powders in CaO-MgO-SiO(2) system with 10 wt% B(2)O(3) additive were synthesized by sol-gel process. Then bioactive porous CaO-MgO-SiO(2) glass-ceramic coatings on Ti-6Al-4V alloy substrates were fabricated using electrophoretic deposition (EPD) technique. After being calcined at 850°C, the above coatings with thickness of 10-150 μm were uniform and crack-free, possessing porous structure with sub-micron and micron size connected pores. Ethanol was employed as the most suitable solvent to prepare the suspension for EPD. The coating porous appearance and porosity distribution could be controlled by adjusting the suspension concentration, applied voltage and deposition time. The heat-treated coatings possessed high crystalline and was mainly composed of diopside, akermanite, merwinite, calcium silicate and calcium borate silicate. Bonelike apatite was formed on the coatings after 7 days of soaking in simulated body fluid (SBF). The bonding strength of the coatings was needed to be further improved.
采用溶胶-凝胶工艺合成了添加 10wt% B2O3 的 CaO-MgO-SiO2 系统亚微米玻璃陶瓷粉末。然后采用电泳沉积（EPD）技术在 Ti-6Al-4V 合金基底上制备了具有生物活性的多孔 CaO-MgO-SiO2 玻璃陶瓷涂层。经 850°C 煅烧后，上述厚度为 10-150μm 的涂层均匀、无裂纹，具有亚微米和微米尺寸连通孔的多孔结构。乙醇被用作 EPD 制备悬浮液的最适宜溶剂。通过调节悬浮液浓度、施加电压和沉积时间，可以控制涂层的多孔外观和孔隙率分布。热处理后的涂层具有高结晶度，主要由透辉石、硅灰石、镁蔷薇辉石、硅酸钙和硼酸钙硅组成。涂层在模拟体液（SBF）中浸泡 7 天后形成了类骨磷灰石。涂层的结合强度有待进一步提高。
