注射成形生物可降解Fe-Mn合金的制备及性能

章也; 李东阳; 李益民; 罗丰华; 舒畅; 李松

doi:10.19976/j.cnki.43-1448/TF.2021089

粉末冶金材料科学与工程 >

2022 , Vol. 27 >Issue 1: 102 - 110

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2021089

工艺技术

注射成形生物可降解Fe-Mn合金的制备及性能

章也 ,
李东阳 ,
李益民 ,
罗丰华 ,
舒畅 ,
李松

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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

收稿日期: 2021-10-28

修回日期: 2021-11-10

网络出版日期: 2021-12-10

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)

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Preparation and properties of biodegradable Fe-Mn alloy by injection molding

ZHANG Ye ,
LI Dongyang ,
LI Yimin ,
LUO Fenghua ,
SHU Chang ,
LI Song

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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

Received date: 2021-10-28

Revised date: 2021-11-10

Online published: 2021-12-10

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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。

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

本文引用格式

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 . DOI: 10.19976/j.cnki.43-1448/TF.2021089

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 words： injection molding; biodegradable alloy; Fe-Mn alloy; mechanical properties; degradation properties

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