摘要
以纳米TiO_2粉末为喷涂原料,采用大气等离子体喷涂技术在医用钛合金上制备氧化钛涂层.利用酸和碱溶液对氧化钛涂层表面进行生物活化处理,体外模拟体液浸泡实验考察涂层的生物活性.采用XRD、SEM、FTIR、EDS等测试技术对改性前后氧化钛涂层的生物活性进行表征.结果表明:氧化钛涂层和钛合金基体的结合强度较高,其值高达40MPa,涂层的耐模拟体液腐蚀性优于钛合金.酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石(类骨磷灰石),显示良好的生物活性.
Titania coatings were deposited on titanium alloy substrates by atmospheric plasma spraying using nano .TiO2 powder as feedstock. Acid and alkali solutions were implied to modify the surface of the as-sprayed titania coatings. The bioactivity of titania coatings before and after modification were investigated by simulated body fluid （SBF） tests in vitro. X-ray diffraction, Scanning electron microscope, Fourier transform infrared spectroscope and Energy diffraction spectroscope were used to investigate the microstructure and composition of titania coatings. The bonding strength and anticorrosion of titania coatings were also studied. The results indicate that the bonding strength between titania coating and Ti alloy substrate is 40MPa. The corrosion resistance performance of titania coating in SBF is better than that of Ti-6Al-4V alloy. The SBF tests show that the carbonate-containing hydroxyapatite is formed on the titania coating surfaces which is treated by H2SO4 and NaOH. However, no bone-like apatite is formed on the surface of as-sprayed titania coating. It is concluded that the bioactivity of titania coating is improved greatly by chemical treatment.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第5期1021-1026,共6页
Journal of Inorganic Materials
基金
国家重点基础研究发展规划项目(973)(2005CB623901)
上海市基础研究重点项目(07JC14057)
国家自然科学基金面上项目(30700170)
常州市工业攻关项目(CE2006013)
