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
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.
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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2022, Vol. 27 
