表面多孔Ti-羟基磷灰石/Ti-Ag生物梯度复合材料的制备与性能  

Fabrication and properties of surface porous Ti-hydroxyapatite/Ti-Ag gradient biocomposites

作　　者：焦美琪 何远怀 邓霞 张玉勤 蒋业华 JIAO Meiqi;HE Yuanhuai;DENG Xia;ZHANG Yuqin;JIANG Yehua(National-Local Joint Engineering Laboratory of Metal Advanced Solidification Forming and Equipment Technology,School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Engineering Technology Research Center of Titanium Products and Application of Yunnan Province,Chuxiong 651209,China)

机构地区：[1]昆明理工大学材料科学与工程学院金属先进凝固成形及装备技术国家地方联合工程实验室,昆明650093 [2]云南省钛材应用产品工程技术研究中心,楚雄651209

出　　处：《复合材料学报》2019年第1期139-146,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(31660262)

摘　　要：采用放电等离子烧结技术制备表面多孔Ti-羟基磷灰石(HA)/Ti-Ag生物梯度复合材料,研究了不同HA含量对复合材料微观结构、界面结合、表面孔隙特征、力学性能及体外生物活性的影响及机制。结果表明,表面多孔Ti-HA/Ti-Ag复合材料中间基体合金主要由α-Ti和Ti2Ag相组成,表面多孔层主要由α-Ti和HA相组成,同时还存在少量CaO、CaTiO3、Ti5P3等反应相;表面多孔Ti-HA/Ti-Ag复合材料中间基体与表面多孔层形成稳定的冶金结合,但随着HA含量增加,反应相增多,界面结合变差,表面孔隙率和平均孔径呈增大趋势,导致平均抗压强度减小且弹性模量降低,因此过高的HA含量会导致材料力学性能下降;体外生物活性实验表明,表面多孔Ti-HA/Ti-Ag复合材料在人工模拟体液中浸泡7天后表面生成大量类骨磷灰石层,并且随着HA含量的增大,磷灰石形成能力明显增强。The surface porous Ti-hydroxyapatite(HA)/Ti-Ag gradient biocomposites were prepared by spark plasma sintering technology.The effects of different HA contents on the microstructure,interface bonding,surface pore characteristics,mechanical properties and in vitro biological activity of the surface porous Ti-HA/Ti-Ag composites were investigated.The results show that the matrix alloys of the composites are mainly consisted ofα-Ti and Ti2 Ag phases.The surface porous layers are mainly consisted ofα-Ti,HA phases and a few reaction phases of CaO,CaTiO3,Ti5 P3.A stable metallurgical bonding on matrix alloys and surface porous layers of the composites could be observed.With increasing of HA contents,the reaction phases of surface porous layers are increased and the bonding degree of interface is deterioration.The average porosity and pore size of surface layers are appeared in a slowly increasing trend.As a result,the average compressive strength and compressive elastic modulus of the surface porous Ti-HA/Ti-Ag composites are decreased.Therefore,the mechanical properties of the composites are reduced at higher HA contents.In vitro bioactivity tests show that lots of bone-like apatite are deposited on thesurface porous Ti-HA/Ti-Ag gradient biocomposites after soaking in SBF for 7 days and the apatite formation ability is significant enhanced with increasing of HA contents.

关 键 词：Ti-Ag 生物梯度复合材料 放电等离子烧结 显微组织 力学性能 磷灰石形成能力 

分 类 号：TB333[一般工业技术—材料科学与工程]