摘要
采用溶胶凝胶法制备了锶掺杂羟基磷灰石(Sr-HA)粉末,将制备的Sr-HA粉末和Ti粉按质量比2∶8压制成坯,在大气环境下烧结制备Sr-HA/Ti生物复合材料,研究烧结温度对Sr-HA/Ti生物复合材料组织结构及生物活性的影响。结果表明:烧结后Sr-HA/Ti复合材料主要由Sr-HA、Ti、TiO2、CaO等物相组成,当温度达到950℃时,材料表面氧化严重,Sr-HA分解增加。大气条件下烧结制备的Sr-HA/Ti复合材料孔径可以满足骨组织长入基本要求,烧结后复合材料冶金结合良好,随着烧结温度的提高复合材料表面孔隙数量增多,孔隙直径减小,细小的孔隙均匀分布于TiO2及α-Ti形成网格结构之间。模拟体液浸泡14天后,850℃烧结的试样表面陶瓷相沉积效果最好,复合材料表面生成了利于成骨的Ca5(PO4)3-x(CO3)xOH相。
Strontium-doped hydroxyapatite(Sr-HA)powders were prepared by sol-gel method.The Sr-HA powders and Ti powders were compacted into compacts at a mass ratio of 2∶8,then prepared into Sr-HA/Ti biocomposites by sintering under atmospheric environment,and the effect of sintering temperature on the structure and biological activity of the Sr-HA/Ti biocomposites was studied.The results show that:the Sr-HA/Ti composites after sintering are mainly composed of Sr-HA,Ti,TiO2 and CaO phases.When the sintering temperature reaches 950℃,the surface oxidation of the composites is serious and the decomposition of Sr-HA phase increases.The pore size of Sr-HA/Ti composites sintered under atmospheric conditions can meet the basic requirement of bone tissue growth,and the metallurgical bonding of the composites after sintering is good.With the increase of sintering temperature,the number of pores on the surface of the composites increases,the pore diameter decreases,and the fine pores are evenly distributed between the titanium dioxide andα-Ti grid structure.After immersiing in simulated body fluids for 14 days,the ceramic phases depositing on the surface of the sample sintered at 850℃are the best,and the Ca5(PO4)3-x(CO3)xOH phase beneficial to osteogenesis is formed on the surface of the composites.
作者
李刚
王莹
田宗伟
孟超
Li Gang;Wang Ying;Tian Zongwei;Meng Chao(College of Material Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期135-138,共4页
Heat Treatment of Metals
基金
国家自然科学基金(51805235)。
关键词
烧结温度
生物复合材料
组织结构
体外生物活性
sintering temperature
bio-composites
microstructure
biological activity in vitro
