Mg-Zn-Ca合金的性能及降解速率控制  

Mechanical Properties and Controlling Degradation Rate of Mg-Zn-Ca Alloy

作　　者：张雅静[1] 左丽静[1] 邢晓乐[1] 王帆[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第7期935-938,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51074049);辽宁省科学技术项目(20082197)

摘　　要：以经过铸造和热挤压的Mg-Zn-Ca合金为研究对象,利用光学显微镜、万能试验机对合金的微观组织以及机械性能进行了分析测试.采用仿生法在该合金表面形成了羟基磷灰石(HA)涂层.利用X射线衍射仪和扫描电子显微镜对涂层结构和形貌进行分析与观察,并对有、无涂层试样进行腐蚀实验研究.结果表明:采用铸造和热挤压技术制备的Mg-Zn-Ca合金抗拉强度和抗压强度与人骨接近,分别为365 MPa和338 MPa;屈服强度为360 MPa,延伸率为10.25%,弹性模量为41.69 GPa.HA涂层能一定程度上降低合金试样的降解速率.The Mg-Zn-Ca alloy formed by casting and hot extrusion was systematically studied.The microstructure and mechanical behaviors of the alloy were analyzed by an optical microscopy and universal testing machine.The hydroxyapatite（HA） coatings on the surface of this magnesium alloy were deposited using a biomimetic technique.The HA coatings were characterized by XRD,and the morphology of the sample surface was observed by SEM.The degradation rates of the samples without and with HA coatings were researched in-vitro corrosion.The results indicated that the tensile strength and compressive strength of Mg-Zn-Ca alloy were close to the human bones,and the values were 365 MPa and 338 MPa,respectively,and the yield strength,elongation and elastic modulus of the alloy were 360 MPa,10.25%,41.69 GPa,respectively.The degradation rates of the samples with HA coatings was slower than that of the samples without HA coatings on the surface.

关 键 词：Mg-Zn-Ca合金 HA涂层 机械性能 仿生涂层法 降解速率 

分 类 号：TB333[一般工业技术—材料科学与工程] TB34