Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (3): 333-339.DOI: 10.12068/j.issn.1005-3026.2021.03.005

• Materials & Metallurgy • Previous Articles     Next Articles

Preparation and Properties of Biodegradable Fe30MnxCa Alloys

ZHANG Ya-jing, WANG Yi-ming, LI Shuai-ping   

  1. School of Material Science & Engineering, Northeastern University, Shenyang 110819,China.
  • Received:2020-09-25 Revised:2020-09-25 Accepted:2020-09-25 Published:2021-03-12
  • Contact: ZHANG Ya-jing
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Abstract: The medical degradable Fe30MnxCa(x=0,1.5,3.0 and 4.5)alloy bars were prepared by mechanical alloying, powder pressing and hot extrusion. The effect of Ca addition on the microstructure and properties of the alloy was studied by optical metallographic microscope, scanning electron microscope (SEM), tensile test, electrochemical test and SBF solution immersion corrosion test. The results show that the Fe30MnxCa alloy is composed by the austenite phase and with the increasing mass fraction of Ca, the hardness increases, and the tensile strength and final elongation decrease.Meanwhile, the degradation performance of the alloy is significantly improved, where the corrosion rate increases from 0.1130mg/(cm2·d)of Fe30Mn to 0.2260mg/(cm2·d)of Fe30Mn4.5Ca in the corrosion tests. The cytotoxicity test indicates that the biocompatibility is 0 ~ 1grade.

Key words: mechanical alloying;biodegradable metal; Fe30MnxCa alloy; corrosion rate; biocompatibility

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