章晓波,薛亚军,王章忠,袁广银,马欣宇

• 1:南京工程学院材料工程学院
• 2:上海交通大学轻合金精密成型国家工程研究中心

摘要(Abstract)：

通过对具有高屈强比的生物镁合金Mg-2.98Nd-0.34Zn-0.46Zr(NZ30K)进行退火与时效处理,研究了退火与时效处理后合金的显微组织、室温力学和腐蚀性能。结果表明,退火与时效处理后粗大的被拉长的晶粒被消除,随退火温度提高,晶粒逐渐粗大,屈服强度降低,而抗拉强度仍保持较高值。试验研究的5种状态合金的屈强比分别为0.98、0.82、0.71、0.60和0.55;在模拟体液中,与挤压时效态合金的腐蚀性能相比,随退火温度升高,退火与时效处理后合金的腐蚀速率先减慢后加快,且为均匀腐蚀。适宜的热处理工艺有效降低合金屈强比,同时稍微提高合金的耐蚀性能。

关键词(KeyWords)： 生物镁合金;显微组织;屈强比;腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金(20100470030);; 南京工程学院创新基金重大项目(CKJA201201);; 南京工程学院国家级大学生实践创新训练计划资助项目(2012JSSPITP1959)

作者(Author): 章晓波,薛亚军,王章忠,袁广银,马欣宇

DOI: 10.13289/j.issn.1009-6264.2013.08.027

参考文献(References)：

• [1]Erne P,Schier M,Resink T J.The road to bioabsorbable stents:reaching clinical reality?[J].Cardiovascular and Interventional Radiology,2006,29(1):11-16.
• [2]Witte F.The history of biodegradable magnesium implants:a review[J].Acta Biomaterialia,2010,6(5):1680-1692.
• [3]Moravej M,Mantovani D.Biodegradable metals for cardiovascular stent application:interests and new opportunities[J].International Journal ofMolecular Sciences,2011,12(7):4250-4270.
• [4]Witte F,Hort N,Vogt C,et al.Degradable biomaterials based on magnesium corrosion[J].Current Opinion in Solid State and Materials Science,2008,12(5-6):63-72.
• [5]曾伟杰,凌友,支晓兴.心血管支架材料生物力学及生物相容性特征[J].中国组织工程研究与临床康复,2008,12(13):2531-2534.ZENG Wei-jie,LING You,ZHI Xiao-xing.Biomechanics and biocompatibility characteristics of cardiovascular stents[J].Journal of ClinicalRehabilitative Tissue Engineering Research,2008,12(13):2531-2534.
• [6]Zhang B,Geng L,Huang L,et al.Enhanced mechanical properties in fine-grained Mg-1.0Zn-0.5Ca alloys prepared by extrusion at differenttemperatures[J].Scripta Materialia,2010,63(10):1024-1027.
• [7]Xu S,Ohishi K,Kamado S,et al.High-strength extruded Mg-Al-Ca-Mn alloy[J].Scripta Materialia,2011,65(3):269-272.
• [8]Zhang X,Yuan G,Niu J,et al.Microstructure,mechanical properties,biocorrosion behavior,and cytotoxicity of as-extruded Mg-Nd-Zn-Zr alloy withdifferent extrusion ratios[J].Journal of the Mechanical Behavior of Biomedical Materials,2012,9:153-162.
• [9]Zhang X,Yuan G,Mao L,et al.Biocorrosion properties of as-extruded Mg-Nd-Zn-Zr alloy compared with commercial AZ31 and WE43 alloys[J].Materials Letters,2012,66(1):209-211.
• [10]Zhang X,Yuan G,Wang Z.Mechanical properties and biocorrosion resistance of Mg-Nd-Zn-Zr alloy improved by cyclic extrusion and compression[J].Materials Letters,2012,74:128-131.
• [11]Wang Y,He Y,Zhu Z,et al.In vitro degradation and biocompatibility of Mg-Nd-Zn-Zr alloy[J].Chinese Science Bullutin,2012,57(17):2163-2170.
• [12]Wang Y,Zhu Z,He Y,et al.In vivo degradation behaviour and biocompatibility of Mg-Nd-Zn-Zr alloy at early stage[J]International Journal ofMolecular Medicine,2012,29(2):178-184.
• [13]章晓波,毛琳,袁广银,等.心血管支架用Mg-Nd-Zn-Zr生物可降解镁合金的性能研究[J].稀有金属材料与工程,2013,42(6):1300-1305.ZHANG Xiao-bo,MAO Lin,YUAN Guang-yin,et al.Study of the properties of biodegradable Mg-Nd-Zn-Zr magnesium alloy for cardiovascular stent[J].Rare Metal and Engineering,2013,42(6):1300-1305.
• [14]Azeem M,Tewari A,Mishra S,et al.Development of novel grain morphology during hot extrusion of magnesium AZ21 alloy[J].Acta Materialia,2010;58(5):1495-1502.
• [15]卢立伟,刘天模,陈勇,等.AZ31镁合金挤压长条晶粒的形成机理与消除方法[J].材料热处理学报,2011,32(12):17-22.LU Li-wei,LIU Tian-mo,CHEN Yong,et al.Formation and elimination of elongated grains in extruded AZ31 magnesium alloy[J].Transactions ofMaterials and Heat Treatment,2011,32(12):17-22.
• [16]Ben-Haroush M,Ben-Hamu G,Eliezer D,et al.The relation between microstructure and corrosion behaviour of AZ80 Mg alloy following differentextrusion temperatures[J].Corrosion Science,2008,50(6):1766-1778.
• [17]Ralston K D,Birbilis N.Effect of grain size on corrosion:a review[J].Corrosion,2010,66(7):1-13.
• [18]Zhang X,Yuan G,Niu J,et al.Effects of extrusion and heat treatment on the mechanical properties and biocorrosion behaviors of a Mg-Nd-Zn-Zr alloy[J].Journal of the Mechanical Behavior of Biomedical Materials,2012,7:77-86.
• [19]Song G,Atrens A,Dargusch M.Influence of microstructure on the corrosion of diecast AZ91D[J].Corrosion Science,1999,41(2):249-273.
• [20]李高林,文九巴,贺俊光,等.稀土Y对AZ80镁合金组织及耐蚀性能的影响[J].材料热处理学报,2012,33(3):52-56.LI Gao-lin,WEN Jiu-ba,HE Jun-guang,et al.Effect of yttrium addition on microstructure and corrosion resistance of AZ80 magnesium alloys[J].Transactions of Materials and Heat Treatment,2012,33(3):52-56.

文章评论(Comment)：