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Title:: Hydrothermal calcification surface modification of biomedical niobium

作者:: 张帆1; 付涛1△; 李纲2△; 王飞3; 1.西安交通大学生命科学与技术学院，西安 710049；2.重庆理工大学化学化工学院，重庆 400054；3.西安电子电力技术研究所，西安 710061

Author(s):: ZHANG Fan1; FU Tao1; LI Gang2; WANG Fei3; 1. School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049，China; 2. School of Chemistry and Chemical Engineering, Chongqing 400054，China; 3. Xi’an Electronic and Power Technologies Research Institute, Xi’an 710061

摘要:: 金属铌具有较低的弹性模量和较好的生物学性能，本研究采用磷酸氢钙溶液对纯铌进行水热钙化表面改性。显微结构和成分分析表明，经过200℃水热处理24 h后，铌表面形成了Nb2O5-磷酸钙的纳米颗粒薄膜。水热处理试样具有较好的亲水性和耐蚀性，在模拟体液中浸泡两周后可诱导生成磷灰石层，表现出生物活性。该方法可用于铌、铌合金及其多孔材料的生物活性表面改性。

Abstract:: The metal niobium has low elasticity modulus and good biological properties. In this paper，CaHPO4 solution was used for hydrothermal calcification surface modification of pure niobium. Microstructural and compositional analyses showed that nanoparticles film composed of Nb2O5-calcium phosphate was formed on niobium surface after hydrothermal treatment at 200℃ for 24 h. The hydrothermally treated sample had good hydrophilicity and corrosion resistance. The treated sample could induce the formation of apatite layer after soaked in the simulated body fluid for two weeks, showing bioactivity. This method can be used for the bioactive surface modification of niobium, niobium alloy and their porous materials.