Microstructure and properties of co-continuous(β-TCP+MgO)/Zn-Mg composite fabricated by suction exsorption for biomedical applications  

真空吸渗法制备生物医用相互连续(β-TCP+MgO)/Zn-Mg复合材料的组织和性能（英文）

作　　者：Xiang WANG Qi-dong NIE Xu-liang MA Jin-long FAN Ting-liang YAN Xin-lin LI 王香;聂其东;马旭梁;范金龙;颜延亮;李新林(哈尔滨工程大学表界面科学与技术研究所教育部超轻材料与表面/界面技术重点实验室,哈尔滨150001;哈尔滨理工大学材料科学与工程学院,哈尔滨150080)

机构地区：[1]Institute of Surface/Interface Science and Technology, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China [2]School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第9期1996-2006,共11页中国有色金属学报（英文版）

基　　金：Project (51101039) supported by the National Natural Science Foundation of China;Project (E201005) supported by the Natural Science Foundation of Heilongjiang Province,China

摘　　要：The biomedical co-continuous(β-TCP+MgO)/Zn-Mg composite was fabricated by infiltrating Zn-Mg alloy into porousβ-TCP+MgO using suction exsorption technique.The microstructure,mechanical properties and corrosion behaviors of the composite were evaluated by means of scanning electron microscopy(SEM),X-ray diffraction(XRD),mechanical testing,electrochemical and immersion test.It was found that the molten Zn-Mg alloy had infiltrated not only into the pores but also into the struts of the porousβ-TCP+MgO scaffold to form a compact composite.The Zn-Mg alloy contacted to theβ-TCP+MgO scaffold closely,and no reaction layer can be found between the alloy and the scaffold.The compressive strength of the composite was as high as244MPa,which was about1000times higher than that of the original porousβ-TCP+MgO scaffold and2/3of the strength of the Zn-Mg bulk alloy.The electrochemical and immersion tests in simulated body fluid(SBF)solution indicated that the corrosion resistance of the composite was better than that of the Zn-Mg bulk alloy.The corrosion products on the composite surface were mainly Zn(OH)2.Appropriate mechanical and corrosion properties indicated that the(β-TCP+MgO)/Zn?Mg composite fabricated by suction exsorption would be a very promising candidate for bone substitute.利用真空吸渗技术通过将Zn-Mg合金渗透到多孔β-TCP+MgO中制备生物医用相互连续(β-TCP+MgO)/Zn-Mg复合材料。采用扫描电镜(SEM)、X射线衍射仪(XRD)、力学性能测试、电化学和浸泡实验研究复合材料的显微组织、力学性能和腐蚀行为。研究结果表明,熔融Zn-Mg合金不仅渗入到多孔β-TCP+MgO骨架的孔隙中,也渗入到筋中,形成致密的复合材料。Zn-Mg合金与β-TCP+MgO骨架接触紧密,在合金与骨架之间没有发现反应层。复合材料的压缩强度达244 MPa,为原始多孔β-TCP+MgO骨架强度的1000倍以上,相当于Zn-Mg大块合金强度的2/3。在模拟体液中的电化学和浸泡测试结果表明,复合材料的耐腐蚀性优于Zn-Mg大块合金的。复合材料表面的腐蚀产物主要是Zn(OH)_2。合适的力学性能和腐蚀性能表明真空吸渗法制备的(β-TCP+MgO)/Zn-Mg复合材料将是潜在的骨替代材料。

关 键 词：(β-TCP+MgO)/Zn-Mg composite microstructure mechanical properties corrosion behavior suction exsorption 

分 类 号：R318.08[医药卫生—生物医学工程] TB333[医药卫生—基础医学]