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粉末冶金材料科学与工程  2022, Vol. 27 Issue (1): 102-110    DOI: 10.19976/j.cnki.43-1448/TF.2021089
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
注射成形生物可降解Fe-Mn合金的制备及性能
章也1, 李东阳1, 李益民1, 罗丰华1, 舒畅2, 李松1
1.中南大学 粉末冶金国家重点实验室,长沙 410083;
2.中南大学 湘雅二医院血管外科,长沙 410011
Preparation and properties of biodegradable Fe-Mn alloy by injection molding
ZHANG Ye1, LI Dongyang1, LI Yimin1, LUO Fenghua1, SHU Chang2, LI Song1
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Department of Vascular Surgery of the Second Xiangya Hospital, Central South University, Changsha 410011, China
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摘要 作为生物可降解材料,Fe-Mn合金具备良好的力学性能和生物相容性,受到广泛关注。本文采用注射成形制备Fe-xMn (x=25,30,35,质量分数,下同)合金,研究烧结时间对Fe-Mn合金显微组织、力学性能和体外静态降解性能的影响。研究表明:烧结时间对Fe-Mn合金相组成无明显影响,而Mn含量影响合金的相组成,Fe-35Mn合金主要由奥氏体组成。注射成形Fe-Mn合金平均晶粒尺寸约为10~20 μm,表面Mn损失约为5.8%~10.82%。烧结时间为7 h时,Fe-35Mn合金力学性能最佳,抗拉强度达到358 MPa,伸长率为10.83%,体外静态浸泡降解实验显示,该合金浸泡一天降解速率为1 mm/y,且随腐蚀产物堆积而逐渐降低。
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章也
李东阳
李益民
罗丰华
舒畅
李松
关键词 注射成形生物可降解合金Fe-Mn合金力学性能降解性能    
Abstract:Fe-Mn alloy as a kind of biodegradable material has attracted extensive attention owing to its good mechanical properties and biocompatibility. In this paper, the Fe-xMn (x=25, 30, 35,mass fraction, the same below) alloys were prepared by injection molding. The effect of sintering time on the microstructure, mechanical properties and in vitro static degradation properties of Fe-Mn alloys was studied. The results show that sintering time has few effects on the phase composition of Fe-Mn alloys. However, Mn content affects the phase composition of the alloys. Fe-35Mn alloys are mainly composed of austenite. The average grain size of Fe-Mn alloys prepared by injection molding is about 10-20 μm, and Mn loss is about 5.8%-10.82% on the surface. When the sintering time is 7 h, the Fe-35Mn alloy possesses the optimal mechanical properties involving the tensile breaking strength of 358 MPa and the elongation of 10.83%. The 30-day static immersion degradation tests show that the degradation rate of the alloy is 1 mm/y after soaking for one day, and gradually decreases with the accumulation of corrosion products.
Key wordsinjection molding    biodegradable alloy    Fe-Mn alloy    mechanical properties    degradation properties
收稿日期: 2021-10-28      出版日期: 2022-02-28
ZTFLH:  R318.08  
基金资助:中南大学研究生科研创新项目(1053320210046); 长沙市“揭榜挂帅”重大科技项目(kq2102003); 战略性新兴产业科技攻关与重大科技成果转化项目(2019GK4002)
通讯作者: 李松,副教授,博士。电话:18684980068;E-mail: ls2011sl@csu.edu.cn   
引用本文:   
章也, 李东阳, 李益民, 罗丰华, 舒畅, 李松. 注射成形生物可降解Fe-Mn合金的制备及性能[J]. 粉末冶金材料科学与工程, 2022, 27(1): 102-110.
ZHANG Ye, LI Dongyang, LI Yimin, LUO Fenghua, SHU Chang, LI Song. Preparation and properties of biodegradable Fe-Mn alloy by injection molding. Materials Science and Engineering of Powder Metallurgy, 2022, 27(1): 102-110.
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